AMS Meeting Full Program
Current as of Tuesday, April 12, 2005 15:08:47
Program 
Deadlines 
Inquiries: meet@ams.org
1991 Joint Mathematics Meetings
San Francisco, CA, January 1619, 1991
Meeting #863
Associate secretaries:
Andy R Magid, AMS amagid@ou.edu
Kenneth A Ross, MAA ross@math.uoregon.edu
Monday January 14, 1991

Monday January 14, 1991, 9:45 a.m.4:30 p.m.
AMS Short Course

9:45 a.m.
Random graphs.
B\'ela Bollob\'as*, University of Cambridge, England

1:00 p.m.
Constructing randomlike graphs.
Fan R.K. Chung*, Bell Communications Research, Morristown, New Jersey

2:45 p.m.
Discrete isoperimetric inequalities.
Imre Leader*, Trinity College, Cambridge, England

4:00 p.m.
Discussion
Tuesday January 15, 1991

Tuesday January 15, 1991, 7:30 a.m.3:00 p.m.
MAA Board of Governors

Tuesday January 15, 1991, 8:00 a.m.4:30 p.m.
AMS Short Course

8:00 a.m.
Random graphs revisited.
B\'ela Bollob\'as*, University of Cambridge, England

9:45 a.m.
Rapidly mixing Markov chains.
Umesh Vazirani*, University of California, Berkeley

1:00 p.m.
Computing the volume of convex bodies.
Alan Frieze*, Carnegie Mellon University

2:45 p.m.
Fourier analysis.
Persi Diaconis*, Harvard University

4:00 p.m.
Discussion

Tuesday January 15, 1991, 1:00 p.m.6:00 p.m.
AMS Council

Tuesday January 15, 1991, 6:00 p.m.8:00 p.m.
MAA Minicourse \#1: Part A
Calculus as a laboratory science
Organizers:
Marcelle Bessman, Frostburg State University

Tuesday January 15, 1991, 6:00 p.m.8:00 p.m.
MAA Section Officers
Wednesday January 16, 1991

Wednesday January 16, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on C*algebras and Noncommutative Topology, I

7:00 a.m.
Transverse index and KKtheory for Riemannian foliations.
James Heitsch, University of Illinois, Chicago
Steven Hurder*, University of Illinois, Chicago
(8635863)

7:30 a.m.
An excision free Chern character for psumable quasihomomorphisms.
Victor Nistor*, University of California, Berkeley
(86346510)

8:00 a.m.
Representations of dense subalgebras of C*algebras with applications to spectral invariance.
Larry B. Schweitzer*, University of California, Berkeley
(86346107)

8:30 a.m.
Reduction of topological stable rank in inductive limits of C*algebras.
Marius Dadarlat, University of California, Los Angeles
Gabriel Nagy*, University of California, Berkeley
Andras Nemethi, INCREST, Romania
Cornel Pasnicu, INCREST, Romania
(86346503)

9:00 a.m.
C*algebras and Fuchsian groups.
John S. Spielberg*, Arizona State University
(86346872)

9:30 a.m.
C*algebras associated to twostep nilpotent groups.
Judith A. Packer*, University of Colorado, Boulder
(86346509)

Wednesday January 16, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Combinatorial Design Theory, I

7:00 a.m.
On resolvable perfect Mendelsohn designs.
Frank E. Bennett*, Mount Saint Vincent University,
(86305413)

7:30 a.m.
Resolvable balanced incomplete block designs with a block size of 8.
Malcolm Greig*, University of British Columbia
(86305295)

8:00 a.m.
Combinatorial techniques for universal classes of hash function.
Douglas R. Stinson*, University of Nebraska, Lincoln
(86305414)

8:30 a.m.
On generalized balanced tournament designs.
Esther R. Lamken*, Institute for Defense Analyses
(86305650)

9:00 a.m.
On the spectrum of alpharesolvable block designs.
R. C. Mullin*, University of Waterloo
(86305310)

9:30 a.m.
Weakly resolvable designs.
Gustavus J. Simmons*, Sandia National Laboratories, Albuquerque, New Mexico
(86305551)

Wednesday January 16, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Boundary Behavior in Partial Differential Equations, I

7:00 a.m.
Convex symmetrization in the plane.
E. W. Stredulinsky*, University of Wisconsin, Richland Center
P. Laurence, Universidad Degli Studi, Italy
(86335584)

7:30 a.m.
Forced critical freesurface waves in channels.
Samuel S. Shen*, University of Saskatchewan
(8633557)

8:00 a.m.
The multilayer fluid problem.
Andrew F. Acker*, Wichita State University
(86335734)

8:30 a.m.
Largetime behavior of the maximal solution of equation u_t =(u^m1 u_x)_x with 1<=0.
Hongfei Zhang*, University of Texas, Austin
(86335652)

9:00 a.m.
The volume infimum for stable liquid bridges.
Robert Finn, Stanford University
Thomas I. Vogel*, Texas A\thsp\&\thsp M University, College Station
(86353205)

9:30 a.m.
On the Floquet exponents of parabolic problems.
Peter Kuchment*, Wichita State University
(86335393)

Wednesday January 16, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Hopf Algebras, I

7:00 a.m.
A theorem from control theory and a theorem from automata theory are the same theorem.
Richard G. Larson*, University of Illinois, Chicago
(86316654)

7:30 a.m.
Coalgebraic foundations of the method of divided differences.
Philip S. Hirschhorn, Wellesley College
Louise A. Raphael*, Howard University
(86316121)

8:00 a.m.
Hopf algebras in combinatorics.
William R. Schmitt*, Memphis State University
(86305696)

8:30 a.m.
Supersymmetric Hopf algebras.
GianCarlo Rota*, Massachusetts Institute of Technology
(86316848)

9:00 a.m.
Bialgebras of linearly recursive sequences.
William Chin*, DePaul University
Jerry Goldman, DePaul University
(86316741)

9:30 a.m.
Invertibility of linearly recursive sequences under Hadamard product.
Richard G. Larson, University of Illinois, Chicago
Earl J. Taft*, Rutgers University, New Brunswick
(8631643)

Wednesday January 16, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#2: Part A
The use of computing in teaching linear algebra
Organizers:
Eugene A. Herman, Grinnell College
Charles H. Jepsen, Grinnell College

Wednesday January 16, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#3: Part A
The mathematics of computer graphics
Organizers:
Jack Goldfeather, Carleton College

Wednesday January 16, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#4: Part A
Elementary robotics
Organizers:
Walter Meyer, Adelphi University

Wednesday January 16, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#5: Part A
Using pocket computers to enhance the teaching and learning of precalculus and calculus
Organizers:
Bert K. Waits, Ohio State University, Columbus
Franklin Demana, Ohio State University, Columbus

Wednesday January 16, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Complex Analysis and Special Functions

7:00 a.m.
On the IlieffSendov conjecture for roots near the unit circle.
Michael J. Miller*, LeMoyne College
(8633092)

7:15 a.m.
New Fibonacci and Lucas identities.
Samih A. Obaid*, San Jose State University
(8633385)

7:30 a.m.
Discrete orthogonal polynomials.
Ismor Fischer*, Naval Postgraduate School
(86333833)

7:45 a.m.
The nondifferentiable dynamics of the 3x+1 problem.
Mohammad Riazi*, Fort Hays State University
(86333461)

8:00 a.m.
Dirichlet averages of univariate functions.
Edward Neuman*, Southern Illinois University, Carbondale
(86333378)

8:15 a.m.
On some strange summation formulas of W. Gosper.
Mourad E.H. Ismail*, University of South Florida
Ruiming Zhang, University of South Florida
(86333137)

8:30 a.m.
Tangential limits and exceptional sets for holomorphic Besov functions in the unit ball of Cn.
Kari Shaw*, Miami University, Oxford
(86332832)

8:45 a.m.
The Bloch theorem in several complex variables. I.
Carl H. FitzGerald*, University of California at San Diego, La Jolla
Sheng Gong, Southern Illinois University, Edwardsville
(86332681)

9:00 a.m.
Plemelj formulae in R^n and C^n, and plane wave decomposition.
John Ryan*, University of Arkansas, Fayetteville
(86332678)

9:15 a.m.
On biholomorphic starlike mapping.
Sheng Gong*, Southern Illinois University, Edwardsville
(86332666)

9:30 a.m.
Invariant proper holomorphic maps between balls.
Daniel Lichtblau*, University of Illinois, UrbanaChampaign
(86332623)

9:45 a.m.
Geometric function theory in several complex variables.
Carolyn R. Thomas*, University of California at San Diego, La Jolla
Carl H. FitzGerald, University of California at San Diego, La Jolla
(86332562)

Wednesday January 16, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Real Analysis, Measure and Integration

7:00 a.m.
Some topological properties of the density topology.
Udayan Darji, Auburn University, Auburn
Patrick Reardon*, Auburn University, Auburn
(86328761)

7:15 a.m.
Lifting of measurable maps.
Michael Edelstein, Dalhousie University
C. C. A. Sastri*, Dalhousie University
(86328773)

7:30 a.m.
Integration in infinite dimensional spaces: A novel approach.
Michel Lobenberg*, Columbia University
(86328596)

7:45 a.m.
A general covering lemma for the real line.
Jesus Munarriz Aldaz*, University of Illinois, UrbanaChampaign
(86328392)

8:00 a.m.
Pseudospectral operators and the pointwise ergodic theorem.
Robert E. Bradley*, Northwestern University
(86328336)

8:15 a.m.
Partially measurable sets in measure spaces.
Max Shiffman*, California State University, Hayward
(86328302)

8:30 a.m.
On normal lattices and separation and semiseparation of lattices.
Robert W. Schutz*, West Babylon, New York
(86328212)

8:45 a.m.
The Hausdorff dimension of graphs of density continuous functions.
Zoltan Buczolich, Eotvos Lorand University, Hungary
Krzysztof Ostaszewski*, University of Louisville
(8632813)

9:00 a.m.
Bounds on the deviation of a function from its averages.
A. M. Fink*, Iowa State University
(86326101)

9:15 a.m.
Dispersive billiards and Brownian motion are statistically indistinguishable.
Kari Eloranta*, Helsinki University of Technology, Finland
(8632882)

9:30 a.m.
Omegalimit sets of D B*_1 functions.
Paul Keller*, University of California, Santa Barbara
(86326604)

9:45 a.m.
Outer functions in Kolmogorov superpositions.
V. L. N. Sarma*, Columbus, Ohio
(86326670)

Wednesday January 16, 1991, 7:00 a.m.9:40 a.m.
AMS Session on Number Theory, I

7:00 a.m.
Isomorphisms of Witt rings.
Jenna P. Carpenter*, Louisiana Tech University
(86311603)

7:15 a.m.
On Mirimanoff type congruences.
S. Hahn*, Korea Institute of Technology, South Korea
(8631136)

7:30 a.m.
Writing integers as sums of products.
Charles E. Chace*, Williams College
(86311371)

7:45 a.m.
Hilbert's Tenth Problem for intermediate rings of algebraic functions.
Alexandra Shlapentokh*, York College, City University of New York
(86311388)

8:00 a.m.
A strang(e) pair of figures.
Norman Richert*, University of Houston, Clear Lake
(86311428)

8:15 a.m.
On Dirichlet powers of Euler's phi function and generalizations.
Alan Loper*, Lawrence University
(86311478)

8:30 a.m.
A spigot algorithm for Pi.
Stanley Rabinowitz*, Westford, Massachusetts
(86311482)

8:45 a.m.
On class numbers of real quadratic fields.
R. A. Mollin*, University of Calgary
(86311495)

9:00 a.m.
A complete solution to the polynomial 3primes problem.
Gove W. Effinger*, Skidmore College
David R. Hayes, University of Massachusetts, Amherst
(86311286)

9:15 a.m.
Countwheels: A mathematical problem arising in horology.
Steven H. Weintraub*, Louisiana State University, Baton Rouge
(86311355)

9:30 a.m.
Unitary amicable pairs by the BDE method.
Rudolph Najar*, California State University, Fresno
(86311516)

Wednesday January 16, 1991, 7:00 a.m.9:55 a.m.
MAA Session on Professional Development for Teachers of Mathematics, I

7:00 a.m.
Introduction

7:05 a.m.
Faculty preparation for a technologically active curriculum.
Linda H. Boyd, Dekalb College
Linda L. Exley, DeKalb College
Sharon C. Ross*, DeKalb College

7:25 a.m.
Training faculty for a laboratoryand writingbased calculus course.
David A. Smith*, Duke University
Lawrence C. Moore, Duke University

7:45 a.m.
Faculty development programs in the use of computer algebra systems as teaching tools.
Don Small*, Colby College

8:05 a.m.
Programs to update the skills of teachers at the precollege and college level.
David Lovelock*, University of Arizona
Elias Toubassi, University of Arizona

8:20 a.m.
Break

8:30 a.m.
Stimulation of faculty development at a fouryear institution.
Theodore A. Vessey*, Saint Olaf College

8:50 a.m.
A training program for parttime faculty.
Kay Gura*, Ramapo College of New Jersey

9:10 a.m.
Discussion

Wednesday January 16, 1991, 7:00 a.m.9:45 a.m.
MAA Session on Humanistic Mathematics, I

7:00 a.m.
Journey to the human side of mathematics.
Joan Countryman*, Germantown Friends School, Philadelphia

7:15 a.m.
The masquerade of formal mathematics.
David W. Henderson*, Cornell University

7:30 a.m.
Mathematics for life and society.
Miriam LipschutzYevick*, Rutgers University, Newark

7:45 a.m.
Mathematics and poetry.
JoAnne S. Growney*, Bloomsburg University

8:00 a.m.
What is mathematics, and why don't they know that.
Harald M. Ness, Jr.*, University of Wisconsin, Fond Du Lac

8:15 a.m.
Teaching mathematics as a subversive activity.
Emelie Kenney*, Siena College

8:30 a.m.
Social and political dimensions of the ethnomathematics program.
Ubiratan D'Ambrosio*, Universidad Estadual de Campinas, Brazil

8:45 a.m.
Discussion

Wednesday January 16, 1991, 7:00 a.m.9:50 a.m.
MAA Session on Lesser Known Geometrical Gems, I

7:00 a.m.
Introduction

7:05 a.m.
The Simson line without cases.
Robert Bix*, University of Michigan, Flint

7:30 a.m.
Lemoinean geometry.
Robert Bumcrot*, Hofstra University

7:45 a.m.
Using ideas of kinematics in solving problems of geometry.
M. S. Jagadish*, Barry University

8:10 a.m.
An application of cross products.
Parviz KhajehKhalili*, Christopher Newport College

8:25 a.m.
Lesserknown triangle centers.
Clark Kimberling*, University of Evansville

8:50 a.m.
The leftright duality of Fermat triangles.
Edward Kitchen*, Santa Monica, California

9:05 a.m.
Triquetras and porisms, or variations on a circular theme.
Dana N. Mackenzie*, Kenyon College

9:30 a.m.
One thing leads to another: From medians and midpoints to the compleat quad via the theorems of Menelaus and Ceva.
Alvin Swimmer*, Arizona State University

Wednesday January 16, 1991, 7:00 a.m.9:55 a.m.
AWM Symposium: The Future of Women in Mathematics, I

7:00 a.m.
Title to be announced.
Carolyn Dean*, University of Michigan, Ann Arbor

7:30 a.m.
Padic representations and L functions.
Bernadette PerrinRiou*, University of Paris, France

8:00 a.m.
Solvability and regularity for tangential CauchyReimann operators.
MeiChi Shaw*, University of Notre Dame

8:30 a.m.
A symplectic proof of a classical convexity result on complex matrices.
JiangHua Lu*, Massachusetts Institute of Technology

9:00 a.m.
Reflecting Brownian motions in polyhedral domains.
Ruth J. Williams*, University of California at San Diego, La Jolla

9:30 a.m.
Bifucations and symmetrybreaking in computational fluid dynamics.
Laurette Tuckerman*, University of Texas, Austin

Wednesday January 16, 1991, 7:00 a.m.8:20 a.m.
MAA Science Policy Committee Special Presentation
Mathematicians and state governments
Organizers:
John A. Thorpe, SUNY at Buffalo

Wednesday January 16, 1991, 8:00 a.m.8:50 a.m.
AMS Retiring Presidential Address
From Coxeter diagrams to Kummer identies.
George Daniel Mostow*, Yale University

Wednesday January 16, 1991, 8:30 a.m.9:55 a.m.
AMSMAASIAM Panel Discussion
What do future college teachers need? What is feasible in Ph.D. programs?

Wednesday January 16, 1991, 8:30 a.m.9:55 a.m.
MAA CUPM Subcommittee on Service Courses Panel Discussion
Perspectives on service courses for business students
Moderators:
Barbara A. Jur, University of Tennessee at Chattanooga
Panelists:
Joe Fiedler, California State University, Bakersfield
James Minatel, Developmental editor at Richard D. Irwin, Inc.
Barry Scholler, Rhode Island College

Wednesday January 16, 1991, 9:05 a.m.9:55 a.m.
AMS Invited Address

Wednesday January 16, 1991, 10:10 a.m.11:00 a.m.
AMSMAA Invited Address
HarishChandra and his work.
Rebecca A. Herb*, University of Maryland, College Park

Wednesday January 16, 1991, 11:00 a.m.12:00 p.m.
National Science Foundation Informal Discussion Group

Wednesday January 16, 1991, 12:00 p.m.1:00 p.m.
AMS Colloquium Lecture: Lecture I
Title to be announved.
Robert D. MacPherson*, Massachusetts Institute of Technology

Wednesday January 16, 1991, 1:15 p.m.2:05 p.m.
MAA Invited Address
Developing the next generation of mathematicians.
Uri Treisman*, Swarthmore College

Wednesday January 16, 1991, 1:15 p.m.5:05 p.m.
AMSMAA Special Session on Research in Undergraduate Mathematics Education, I

1:15 p.m.
Teaching and learning college mathematics: A review of research.
Joanne Rossi Becker*, San Jose State University
Barbara J. Pence, San Jose State University
(8639820)

1:45 p.m.
Student understanding of calculus through computer graphics.
Charlene E. Beckmann*, Grand Valley State University
(86398270)

2:15 p.m.
Building concept images  supercalculators and students' use of multiple representations.
Dianne Hart*, Oregon State University
(86398269)

2:45 p.m.
The effects of using computer algebra in teaching undergraduate calculus.
Phoebe T. Judson*, Trinity University
(8639815)

3:15 p.m.
Even good calculus students can't solve nonroutine problems.
John Selden, Tennessee Technological University
Annie Selden*, Tennessee Technological University
Alice Mason, Tennessee Technological University
(8639831)

3:45 p.m.
An instructional treatment for functions that seems to help.
Ed Dubinsky*, Purdue University, West Lafayette
(8639866)

4:15 p.m.
Multiple representations for functions.
Albert A. Cuoco*, Woburn High School, Massachusetts
(8639819)

4:45 p.m.
Informal Discussion

Wednesday January 16, 1991, 1:15 p.m.5:05 p.m.
AMS Special Session on C*algebras and Noncommutative Topology, II

1:15 p.m.
Generalizations of the Weylvon Neumann theorem.
Lawrence G. Brown*, Purdue University, West Lafayette
(86346502)

1:45 p.m.
On the classification of C*algebras of real rank zero
George A. Elliott*, University of Toronto, and Mathematics Institute, Copenhagen, Denmark
(86346847)

2:15 p.m.
Certain C*algebras of real rank zero and their multiplier algebras.
Shuang Zhang*, University of Cincinnati
(86346637)

2:45 p.m.
Approximation of unitaries by unitaries with finite spectrum.
N. Christopher Phillips*, University of Oregon
(86346219)

3:15 p.m.
Almost commuting projections.
Alexander Kumjian*, University of Nevada, Reno
(86346785)

3:45 p.m.
Almost commuting unitaries.
ManDuen Choi*, University of Toronto
(8634647)

4:15 p.m.
Reduction of real rank in inductive limits of C*algebras.
Ola Bratteli*, University of Trondheim, Norway
(86346402)

4:45 p.m.
Which C*algebras have *regular coordinates?
K. R. Goodearl*, University of Utah
(86346106)

Wednesday January 16, 1991, 1:15 p.m.3:35 p.m.
AMS Special Session on Oscillation and Dynamics in Delay Equations, I

1:15 p.m.
Oscillation and Lyapunov functions for wave equations.
T. A. Burton*, Southern Illinois University, Carbondale
J. Terjeki, Bolyai Institute, Hungary
Bo Zhang, Southern Illinois University, Carbondale
(8633517)

1:45 p.m.
A uniform estimate for slowly oscillating solutions of singularly perturbed delay equations.
John MalletParet*, Brown University
(86339699)

2:15 p.m.
Periodic solutions of differentialdelay equations with state dependent time lags.
Roger Nussbaum*, Rutgers University, New Brunswick
(86334201)

2:45 p.m.
Some results on the asymptotic behavior of the solutions of a second order nonlinear neutral delay equation.
John R. Graef, Mississippi State University
Paul W. Spikes*, Mississippi State University
Myron K. Grammatikopoulos, University of Ioannina, Greece
(86334856)

3:15 p.m.
Oscillation and stabillity for a statedependent delay equation.
Hal L. Smith*, Arizona State University
(86334223)

Wednesday January 16, 1991, 1:15 p.m.5:00 p.m.
AMS Special Session on History of Mathematics, I

1:15 p.m.
African origins of the mathematical sciences.
Abdulalim A. Shabazz*, Clark Atlanta University
(86301630)

1:50 p.m.
Genesis of the equation.
Barnabas Hughes*, California State University, Northridge
(86301114)

2:25 p.m.
Euler's contributions to the calculus.
V. Frederick Rickey*, Bowling Green State University
(86301661)

2:55 p.m.
Sophus Lie and the geometrical origins of the symplectic groups.
Thomas Hawkins*, Boston University
(86301224)

3:30 p.m.
The contributions of Hausdorff and Sierpinski to Cantor's continuum problem.
Gregory H. Moore*, McMaster University
(86301305)

4:00 p.m.
Abraham Robinson and World War II: The making of a mathematical logician.
Joseph W. Dauben*, Herbert H. Lehman College, City University of New York
(86301854)

4:35 p.m.
Hassler Whitney's lecture on the history of topology, given in Campinas.
Ubiratan D'Ambrosio*, Universidade Estadual de Campinas, Brazil
(86301769)

Wednesday January 16, 1991, 1:15 p.m.5:05 p.m.
AMS Special Session on Combinatorial Design Theory, II

1:15 p.m.
Decomposing Steiner systems into isomorphic partial systems.
Alexander Rosa*, McMaster University
(86305416)

1:45 p.m.
Block designs and relative compromise of statistical databases.
Mirka Miller, Unversity of New England, Australia
Jennifer Seberry*, University of New South Wales, Australia
(86305531)

2:15 p.m.
A mathematical model of competing species and Hadamard designs.
Masakazu Jimbo*, Gifu University, Japan
Yoshiaki Ito, Institute of Statistical Mathematics, Japan
(86305370)

2:45 p.m.
A doubling construction for certain selforthogonal 2sequencings.
Bruce A. Anderson*, Arizona State University
(86305412)

3:15 p.m.
Frames with block size fourconstructions and applications.
Rolf Rees*, Memorial University of Newfoundland
Douglas Stinson, University of Nebraska, Lincoln
(86305411)

3:45 p.m.
Arcs in Latin squares.
V. C. Mavron, University College of Wales, Wales
W. D. Wallis*, Southern Illinois University, Carbondale
(86305148)

4:15 p.m.
Large sets of disjoint tdesigns.
Yeow Meng Chee, University of Waterloo
Charles J. Colbourn, University of Waterloo
Steven C. Furino, University of Waterloo
Donald L. Kreher*, University of Wyoming
(86305289)

4:45 p.m.
Delsarte's inequalities and tdesigns.
Richard M. Wilson*, California Institute of Technology
(86305649)

Wednesday January 16, 1991, 1:15 p.m.5:05 p.m.
AMS Special Session on Boundary Behavior in Partial Differential Equations, II

1:15 p.m.
Boundary behavior of area minimizing currents, Rado's theorem, and the footprint problem.
Harold R. Parks*, Oregon State University
(86349298)

1:45 p.m.
Radial limits of capillary surfaces.
Kirk E. Lancaster, Wichita State University
David Siegel*, University of Waterloo
(86335505)

2:15 p.m.
Propogation in semilinear transmission problems.
Mark Williams*, University of North Carolina, Chapel Hill
(86335200)

2:45 p.m.
Numerical study of nearly discontinuous behavior of certain capillary surfaces.
Randolph E. Bank, University of California at San Diego, La Jolla
Paul Concus, Lawrence Berkeley Laboratory and University of California, Berkeley
Robert Finn*, Stanford University
(86368204)

3:15 p.m.
Second microlocal ellipticity and propagation of singularities for semilinear wave equations.
Ant\^onio S\'a Barreto*, Purdue University, West Lafayette
(86335581)

3:45 p.m.
Qualitative behavior solutions of elliptic free boundary problems.
Kirk E. Lancaster*, Wichita State University
(86335583)

4:15 p.m.
LaplaceBelktrami operators for manifolds degenerating along a hypersurface.
Patrick McDonald*, Ohio State University, Columbus
(86335113)

4:45 p.m.
Regularity and asymptotic behavior of mixed initialboundary value problems.
Joseph Bennish*, California State University, Long Beach
(86335602)

Wednesday January 16, 1991, 1:15 p.m.5:05 p.m.
AMS Special Session on Hopf Algebras, II

1:15 p.m.
Hopf freeness and consequences.
Warren D. Nichols*, Florida State University
M. Bettina Zoeller Richmond, Western Kentucky University
(86316763)

1:45 p.m.
Freeness of Hopf algebras over coideal subalgebras.
Akira Masuoka*, Nippon Institute of Technology, Japan
(86316547)

2:15 p.m.
On cosemisimple Hopf algebras with exactly one grouplike.
Warren D. Nichols, Florida State University
M. Bettina Zoeller Richmond*, Western Kentucky University
(86316512)

2:45 p.m.
A new oneparameter family of 2 x 2 matrix bialgebras.
Mitsuhiro Takeuchi*, University of Tsukuba, Japan
Daisuke Tambara, Hirosaki University, Japan
(86316164)

3:15 p.m.
The quantum YangBaxter equation in a modulecomodule context.
David E. Radford*, University of Illinois, Chicago
(86316682)

3:45 p.m.
Hopf algebras in braided categories.
Shahn Majid*, University of Cambridge, England
(86316123)

4:15 p.m.
A class of infinite dimensional Lie bialgebras containing the Virasoro algebra.
Walter J. Michaelis*, University of New Orleans
(8631732)

4:45 p.m.
Parametrizations by coalgebras and deformations.
Luzius Grunenfelder*, Dalhousie University
(86316122)

Wednesday January 16, 1991, 1:15 p.m.3:05 p.m.
AMS Special Session on Entire Function Theory, I

1:15 p.m.
Zeta regularized products.
J. R. Quine*, Florida State University
(8633078)

1:45 p.m.
The growth of solutions of linear differential equations with entire coefficients.
Simon Hellerstein*, University of Wisconsin, Madison
Joseph B. Miles, University of Illinois, UrbanaChampaign
John Rossi, Virginia Polytechnic Institute and State University
(86330262)

2:15 p.m.
Some special differential polynomials of entire functions.
Linda Sons*, Northern Illinois University
(86330217)

2:45 p.m.
New lower bounds for the de BruijnNewman constant cap lambda.
Richard S. Varga*, Kent State University, Kent
(86330294)

Wednesday January 16, 1991, 1:15 p.m.5:05 p.m.
AMS Special Session on Real Algebraic Geometry, I

1:15 p.m.
Lower bounds for computing with integer inputs.
Michael D. Hirsch*, University of California, Berkeley
(86314312)

1:45 p.m.
Witt group of curves over global fields.
R. Parimala*, Tata Institute of Fundamental Research, India and University of California, Berkeley
R. Sridharan, Tata Institute of Fundamental Research, India and University of California, Berkeley
(86314276)

2:15 p.m.
Reduced norm square of Pfaffian.
R. Sridharan*, Tata Institute of Fundamental Research, India
(86316277)

2:45 p.m.
Semirigid functions.
Manfred Knebusch*, University of Regensburg, Federal Republic of Germany
(86314853)

3:15 p.m.
The PierceBirkhoff conjecture for curves.
Murray Marshall*, University of Saskatchewan
(8631234)

3:45 p.m.
Topological equivalence of real binary forms.
David Weinberg*, Texas Tech University
Dave Witte, Williams College
(86357511)

4:15 p.m.
Order of contact of points in the real spectrum.
James J. Madden*, Louisiana State University, Baton Rouge
(86314407)

4:45 p.m.
On analytically varying solutions to Hilbert's 17th problem.
Charles N. Delzell*, University of California, Berkeley
(86314743)

Wednesday January 16, 1991, 1:15 p.m.3:15 p.m.
MAA Minicourse \#1: Part B
Calculus as a laboratory science
Organizers:
Marcelle Bessman, Frostburg State University

Wednesday January 16, 1991, 1:15 p.m.3:15 p.m.
MAA Minicourse \#3: Part B
The mathematics of computer graphics
Organizers:
Jack Goldfeather, Carleton College

Wednesday January 16, 1991, 1:15 p.m.4:55 p.m.
AMS Session on Geometry

1:15 p.m.
An infinite number of infinite chains of Morley triangles.
James Smart*, San Jose State University
(8635107)

1:30 p.m.
Inversion transformation with regard to any curve.
Krishnanand Verma*, University of Wisconsin, Whitewater
(86351100)

1:45 p.m.
On moving a sofa around a corner.
Joseph L. Gerver*, Rutgers University, Camden
(86351255)

2:00 p.m.
Circular sets.
George Baloglou*, State University of New York, College at Oswego
Phil Tracy, State University of New York, College at Oswego
(86351271)

2:15 p.m.
Two approaches for classification of certain translation planes.
Dale R. Oliver*, Colorado State University
(86351535)

2:30 p.m.
An application of discrete Fourier transform to a problem in geometry.
ChungWu Ho*, Southern Illinois University, Edwardsville
JauShyong Shiue, University of Nevada, Las Vegas
(86351577)

2:45 p.m.
Old and new Euclidean theorems from Lie geometry, I.
Jay P. Fillmore*, University of California at San Diego, La Jolla
Arthur Springer, San Diego State University
(86351706)

3:00 p.m.
Old and new Euclidean theorems from Lie geometry, II.
Jay P. Fillmore, University of California at San Diego, La Jolla
Arthur Springer*, San Diego State University
(86351707)

3:15 p.m.
A short proof of the dconnectedness of dpolytopes.
D. W. Barnette*, University of California, Davis
(86352162)

3:30 p.m.
Hidden variable fractal interpolation surfaces.
Douglas Hardin, Vanderbilt University
Peter R. Massopust*, Vanderbilt University
(8632653)

3:45 p.m.
Finite fractals.
Steve Gibert*, West Georgia College
(86328599)

4:00 p.m.
Tillings via branched covering spaces and colorings.
Jonathan Sondow*, Yeshiva University
(86399768)

4:15 p.m.
The complete classification of the space group orbits in E^3.
Steven L. Farris*, University of Southern Maine
(86351128)

4:30 p.m.
Properties of sets related to the farthest point problem.
Jack M. Robertson*, Washington State University
(86352195)

4:45 p.m.
Computing approximations of convex sets by polytopes.
Dan Butnariu*, University of Haifa, Israel and University of Texas, Arlington
Yair Censor, University of Haifa, Israel
(86352282)

Wednesday January 16, 1991, 1:15 p.m.4:55 p.m.
AMS Session on Operator Theory, I

1:15 p.m.
The Haunsdorff mean of a FourierStieltjes transform.
Constantine Georgakis*, DePaul University
(86342799)

1:30 p.m.
A class of operators on L^2_h.
Nazih S. Faour*, Kuwait University, Kuwait
(8634706)

1:45 p.m.
Antiautomorphisms of UHF algebras.
Joseph F. Conrad*, Pennsylvania State University, Altoona
(8634728)

2:00 p.m.
Interpolation of operators and spectra of integral operators.
Karen Saxe*, Saint Olaf College
(86347333)

2:15 p.m.
Purely nonpointwise Markov operators.
Tomasz Downarowicz*, University of North Texas
(86347399)

2:30 p.m.
An extension of Burnside's theorem to reflexive Banach spaces.
Victor Lomonosov*, Kent State University, Kent
(86347418)

2:45 p.m.
Cyclic cohomology associated with almost commuting C*algebras.
Daoxing Xia*, Vanderbilt University
(8634742)

3:00 p.m.
Local spectral properties of multipliers on Banach algebras and applications to convolution operators.
Michael M. Neumann*, Mississippi State University
(86347447)

3:15 p.m.
Locally compact semialgebras generated by a commuting operator family.
Nagaiah Nandakumar*, Deleware State College
Cornelis Vandermee, University of Delaware
(86347477)

3:30 p.m.
Some remarks on the range of sums of accretive and continuous operators in Banach spaces.
Claudio Morales*, University of Alabama, Huntsville
(86347530)

3:45 p.m.
On the ideal structure of positive, eventually compact linear operators on Banach lattices.
RueyJen Jang Lewis*, Texas Tech University
Harold Dean Victory, Jr., Texas Tech University
(86347571)

4:00 p.m.
Essentially commuting Toeplitz operators with harmonic symbols.
Karel Stroethoff*, University of Montana
(86347620)

4:15 p.m.
An operator equation of SturmLiouville type.
Dan D. Pascali*, National Science Foundation
(86347629)

4:30 p.m.
Dual algebras generated by a weighted shift.
George R. Exner*, Bucknell University
(86347657)

4:45 p.m.
On the density of the range of some nonlinear operators.
P. S. Milojevi\'c*, New Jersey Institute of Technology
(86347669)

Wednesday January 16, 1991, 1:15 p.m.4:55 p.m.
AMS Session on Analysis, I

1:15 p.m.
Asymptotic behavior of solutions of EmdenFowler difference equations with oscillating coefficients.
William F. Trench*, Trinity University
(86339460)

1:30 p.m.
Role of numerical range in approximationsolvability of nonlinear functional equations.
Ram Verma*, University of Central Florida
(8633975)

1:45 p.m.
Global asymptotic stability in a discrete delay logistic model.
Saber Elaydi*, Trinity University
(86339489)

2:00 p.m.
Inner product spaces and functional equations.
B. R. Ebanks, University of Louisville
P. L. Kannappan, University of Waterloo
P. K. Sahoo*, University of Louisville
(86339441)

2:15 p.m.
Periodic families of solutions for difference equations with a first integral.
William Rivera*, West Georgia College
(8633918)

2:30 p.m.
A matrix characterization of statistical convergence.
J. A. Fridy*, Kent State University, Kent
H. I. Miller, University of Sarajevo, Yugoslavia
(86340377)

2:45 p.m.
On the strong stability of the solutions to Krein's invariant subspace problem.
Miguel LaCruz*, Kent State University, Kent
(86340420)

3:00 p.m.
Strong integral summability, measures, and subsets of betaH.
J. Connor*, Ohio University, Athens
M. A. Swardson, Ohio University, Athens
(86340675)

3:15 p.m.
Existence of bounded solutions of system of discrete equations.
Mohammad H. Moadab*, Virginia State University
(86340720)

3:30 p.m.
Global smoothness of approximating functions.
George Anastassiou*, Memphis State University
Claudia Cottin, University of Duisburg, Federal Republic of Germany
Heinz H. Gonska, European Business School, Federal Republic of Germany
(86341102)

3:45 p.m.
The Cauchy interpolation formula and sampling theorem.
Nasser Dastrange*, Buena Vista College
(86341351)

4:00 p.m.
Asymptotics of a class of multidimensional oscillatory integrals with degenerate phase.
David O. Kaminski*, University of Lethbridge, Canada
(8634138)

4:15 p.m.
On the nonexistence of a basis of translates and a basis of pseudo translates.
Tim Olson*, Auburn University, Auburn
Richard A. Zalik, Auburn University, Auburn
(86341471)

4:30 p.m.
Signals reproduction.
Robert Kreczner*, University of Wisconsin, Stevens Point
(86341559)

4:45 p.m.
Functions with very rapidly decaying Fourier coefficients.
John E. McCarthy*, Indiana University, Bloomington
(8634214)

Wednesday January 16, 1991, 1:15 p.m.4:55 p.m.
AMS Session on Number Theory, II

1:15 p.m.
An existence theorem for local Artin root numbers.
Robert Perlis*, Louisiana State University, Baton Rouge
(86311527)

1:30 p.m.
Apery numbers, Jacobi sums, and padic hypergeometric functions.
Paul Thomas Young*, Tennessee Technological University
(86311288)

1:45 p.m.
Results concerning the ErdosStrauss conjecture.
Roger H. Moritz*, Alfred University
(86311176)

2:00 p.m.
On dynamics of certain Cantor sets.
Saad I. ElZanati*, Auburn University, Auburn
William R. R. Transue, Auburn University, Auburn
(86311536)

2:15 p.m.
Small zeros of quadratic Lfunctions.
Ali E. \"Ozl\"uk*, University of Maine, Orono
C. Snyder, University of Maine, Orono
(86311592)

2:30 p.m.
On the conjecture of ErdosStrauss.
Mohammad H. Ahmadi*, University of Wisconsin, Whitewater
(86311594)

2:45 p.m.
Digital sum sums.
Curtis Cooper*, Central Missouri State University
Robert E. Kennedy, Central Missouri State University
(86311598)

3:00 p.m.
On digital sums of powers of primes. Part II.
Robert E. Kennedy*, Central Missouri State University
Curtis Cooper, Central Missouri State University
(86311611)

3:15 p.m.
Constructing unramified abelian extensions.
Stella Roberson Ashford*, Southern University, Baton Rouge
(86311605)

3:30 p.m.
Discrete logarithms over GF(p^2).
Renet Lovorn*, University of Georgia
(86311625)

3:45 p.m.
On the coefficients of cyclotomic polynomials.
Gennady Bachman*, University of Illinois, UrbanaChampaign
(86311680)

4:00 p.m.
On Dirichlet's class number formula.
Harold M. Stark*, University of California at San Diego, La Jolla
(86311704)

4:15 p.m.
Special functions on finite analogues of upper half planes.
Audrey Terras*, University of California at San Diego, La Jolla
(86311705)

4:30 p.m.
Some properties of Cayley graphs attached to Aff (2,p).
Steven Poulos*, University of California at San Diego, La Jolla
(86311729)

Wednesday January 16, 1991, 1:15 p.m.4:10 p.m.
AMS Session on Logic and Set Theory

1:15 p.m.
Extending reasonable ideals to countably saturated ideals in small algebras of sets.
Andrzej Rusewicz*, University of Minnesota, Minneapolis
(86304391)

1:30 p.m.
Ramsey cardinals, alphErdos cardinals, and the core model.
Dirk Schlingmann*, Bethany College
(86304484)

1:45 p.m.
Application of Sierpinski sets.
Kandasamy Muthuvel*, University of Wisconsin, Oshkosh
(86304517)

2:00 p.m.
Using model theory to determine Wadge strategies.
Tom Linton*, University of Wisconsin, Madison
(86304528)

2:15 p.m.
A generalization of Baire category in a continuous set.
Brian King*, Augusta College
(86304843)

2:30 p.m.
Some recursiontheoretic approach to problems in complexity theory.
Hisao Tanaka*, University of California, Santa Barbara and Hosei University, Japan
(86303159)

2:45 p.m.
Axioms for natural numbers.
D. H. Potts*, California State University, Northridge
(86303248)

3:00 p.m.
Bounded MartinLof type theory.
Joseph L. Pe*, University of Illinois, UrbanaChampaign
(86303345)

3:15 p.m.
Every sequence of positive upper density contains and SIM seta nonstandard tool in combinatorial number theory.
Steven C. Leth*, University of Northern Colorado
(86303368)

3:30 p.m.
Syllogistics defined in relation algebras.
Marcin Schroeder*, Southern Illinois University, Carbondale
(86303659)

3:45 p.m.
On the algebraic closure lattices of algebraically closed fields.
Kitty L. Holland*, University of Illinois, Chicago
(86303829)

4:00 p.m.
The finite elements and the spline functions.
Tian Xiao He*, Texas A\thsp\&\thsp M University, College Station
(86365514)

Wednesday January 16, 1991, 1:15 p.m.5:05 p.m.
MAA Session on Professional Development for Teachers of Mathematics, II

1:15 p.m.
Introduction

1:20 p.m.
Ideas for faculty enhancement in mathematics and the teaching of mathematics.
Sherralyn D. Craven*, Central Missouri State University

1:40 p.m.
Preparing teachers for general studies: The Ball State model.
Kay I. Meeks*, Ball State University
Charles V. Jones, Ball State University

2:00 p.m.
The role of the computer in the transformation of undergraduate mathematics instruction.
Chris Avery*, De Anza College

2:20 p.m.
Bitnet/Internet: A resource for professional development.
Ronald W. DeGray*, Saint Joseph's College

2:35 p.m.
Break

2:45 p.m.
Teacher as a role model II.
Arnold E. Ross*, Ohio State University, Columbus

3:05 p.m.
THAMASTER for retraining teachers.
Madeleine J. Long*, Long Island University, Brooklyn Center

3:25 p.m.
Discussion

Wednesday January 16, 1991, 1:15 p.m.4:45 p.m.
MAA Session on Humanistic Mathematics, II

1:15 p.m.
Intrinsic political aspects of mathematics in education.
Marcelo C. Borba*, Cornell University

1:30 p.m.
Using mathematics courses in support of humanities in a liberal arts curriculum.
M. S. Jagadish*, Barry University

1:45 p.m.
Special problems: An alternative to journals in mathematics courses.
Kathleen Shannon*, Salisbury State University
Elizabeth Curtin, Salisbury State University

2:00 p.m.
Mathematics in Western civilization.
Dorothy Nelms*, Centre College

2:15 p.m.
Humanizing basic skills requirements.
Martin Hoffman*, Queens College, City University of New York

2:30 p.m.
Teaching geometry humanistically to humanists.
Thomas W. Rishel*, Cornell University

2:45 p.m.
Thinking about mathematics teaching and learning: A case for multiple perspectives.
Frank Davis*, Lesley College Graduate School

3:00 p.m.
Mathematics as human activity: What is this notion that we call mathematics?
Erick Smith*, Cornell University

3:15 p.m.
Clustering mathematics: An approach to humanistic mathematics.
John W. Emert*, Ball State University
Charles V. Jones, Ball State University

3:30 p.m.
Content, process, instructor, system: Some issues in humanizing college mathematics.
Julian Weissglass*, University of California, Santa Barbara

3:45 p.m.
Discussion

Wednesday January 16, 1991, 1:15 p.m.4:40 p.m.
MAA Session on Lesser Known Geometrical Gems, II

1:15 p.m.
Introduction

1:20 p.m.
Lesserknown integer polygons.
James H. Jordan*, Washington State University

1:45 p.m.
The triangles with one angle twice the difference between the others.
Mogens Esrom Larsen*, Kobenhavns University, Denmark

2:00 p.m.
Relating angles to their intercepted arcs.
Seymour Schuster*, Carleton College

2:15 p.m.
Sterographic projection: Geological applications.
Ernest J. Manfred*, United States Coast Guard Academy

2:40 p.m.
Extending the Pythagorean theorem.
Paul Fjelstad*, Northfield, Minnesota

2:50 p.m.
Break

3:10 p.m.
Stewart's theorem: More power than meets the eye.
Franklin Steen*, Wallingford, Connecticut

3:35 p.m.
Geometry via half turns and reflections.
Subhash C. Saxena*, University of South Carolina, Costal Carolina College, Conway

3:50 p.m.
How does Fagnano's problem relate to glide reflections?
Dorothy J. Williams*, Portland State University

4:15 p.m.
Introduction to plane hyperbolic geometry.
John I. Nassar*, Muhlenberg College

4:30 p.m.
Circular planes.
M. A. Kishta*, United Arab Emirates University, United Arab Emirates

Wednesday January 16, 1991, 2:20 p.m.3:10 p.m.
MAA Invited Address
An analogue of Huber's formula for Riemann's zeta function.
Floyd L. Williams*, University of Massachusetts, Amherst

Wednesday January 16, 1991, 2:20 p.m.4:20 p.m.
AWM Symposium: The Future of Women in Mathematics, II

2:20 p.m.
Combinatorics and topology of subgroup complexes.
Lynne M. Butler*, Princeton University

2:50 p.m.
The search for provably secure codes.
Shafi Goldwasser*, Massachusetts Institute of Technology

3:20 p.m.
Gibbs measures and deformations of toral diffeomorphisms.
Elise E. Cawley*, State University of New York, Stony Brook

3:50 p.m.
Higher order elliptic partial differential operators in nonsmooth domains.
Jill Pipher*, Brown University

Wednesday January 16, 1991, 3:25 p.m.4:15 p.m.
AMS Invited Address
Twodimensional modular representations of the Galois group of Q.
Kenneth A. Ribet*, University of California, Berkeley
(86311300)

Wednesday January 16, 1991, 3:30 p.m.5:30 p.m.
MAA Minicourse \#4: Part B
Elementary robotics
Organizers:
Walter Meyer, Adelphi University

Wednesday January 16, 1991, 3:30 p.m.5:30 p.m.
MAA Minicourse \#6: Part A
Pedagogical uses of Derive and GyroGraphics
Organizers:
Jerry Johnson, Oklahoma State University
Benny Evans, Oklahoma State University

Wednesday January 16, 1991, 5:00 p.m.7:00 p.m.
AMSMAA Discussion
Estate planning for the mathematical community
Organizers:
Richard Witter, MAA
Timothy J. Goggins, AMS

Wednesday January 16, 1991, 5:30 p.m.7:00 p.m.
MAA CAS Workshop Reunion
Computer Algebra Systems workshop reunion

Wednesday January 16, 1991, 6:00 p.m.7:00 p.m.
MAA Committee on the Mathematical Education of Teachers Open Discussion
A call for change
Organizers:
James R.C. Leitzel, Ohio State University

Wednesday January 16, 1991, 6:00 p.m.7:00 p.m.
MAA Video Presentation
Archimedean and Archimedean dual polyhedra
Organizers:
Lorraine L. Foster, California State University, Northridge

Wednesday January 16, 1991, 6:15 p.m.7:15 p.m.
Interagency Commission for Extramural Mathematics Programs Session

Wednesday January 16, 1991, 7:30 p.m.8:30 p.m.
AMS Josiah Willard Gibbs Lecture
The mysteries of space.
Sir Michael F. Atiyah*, Master of Trinity College, England
Thursday January 17, 1991

Thursday January 17, 1991, 7:00 a.m.9:50 a.m.
AMSMAA Special Session on Research in Undergraduate Mathematics Education, II

7:00 a.m.
On the construction of knowledge in mathematics: Formation of entities, abstraction, and generalization.
Guershon Harel*, Purdue University, West Lafayette
(86398104)

7:30 a.m.
A framework for understanding the learning and use of mathematical notations.
James J. Kaput*, Southeastern Massachusetts University
(86398395)

8:00 a.m.
Symbiotic effects of collaboration, verbalization, and cognition in elementary statistics.
Martin V. Bonsangue*, Mount San Antonio Community College
(86398157)

8:30 a.m.
Exploratory study of the proofwriting performance of college students in elementary group theory.
Eric W. Hart*, Maharishi International University
(86398296)

9:00 a.m.
Learning abstract algebra via programming in ISETL.
Uri Leron*, TechnionIsrael Institute of Technology, Israel
(8639880)

9:30 a.m.
A unified approach to developing intuition in mathematics.
Anne Dow*, Maharishi International University
(86398175)

Thursday January 17, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on C*algebras and Noncommutative Topology, III

7:00 a.m.
Topological invariants associated with the spectrum of crossed products.
Iain Raeburn, University of New South Wales, Australia
Dana P. Williams*, Dartmouth College
(86346245)

7:30 a.m.
Groups, graphs, and operator algebras.
William L. Paschke*, University of Kansas
(86346165)

8:00 a.m.
AFalgebras and dynamical systems.
Richard H. Herman*, University of Maryland, College Park
Ian Putnam, Dalhousie University
Christian Skau, University of Trondheim, Norway
(86346857)

8:30 a.m.
C*algebras generated by stable relations.
Terry A. Loring*, University of New Mexico
(86346193)

9:00 a.m.
Equivariant orderd K_otheory of product actions of compact groups.
David Handelman*, University of Ottawa
(86346776)

9:30 a.m.
A suspension therorem for homogeneous C*algebras.
M. Dadarlat*, University of California, Los Angeles
(86346544)

Thursday January 17, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Oscillation and Dynamics in Delay Equations, II

7:00 a.m.
The discrete Lyapunov function and the oscillation of solutions for differential delay equations.
Yulin Cao*, University of Georgia
(86334136)

7:30 a.m.
A simple model for price fluctuations in a single commodity market.
A. F. Farahani, University of Rhode Island
E. A. Grove*, University of Rhode Island
(86334105)

8:00 a.m.
A slewing beam problem.
Richard K. Miller*, Iowa State University
Wolfgang Desch, Graz University, Austria
Steven B. Skaar, Notre Dame University
(86345506)

8:30 a.m.
Oscillations in equations with piecewise constant delays.
Joseph Wiener*, University of Texas, Pan American
(86334111)

9:00 a.m.
Small solutions for functional differential equations.
Sjoerd M. Verduyn Lunel*, Georgia Institute of Technology and Free University, The Netherlands
(8633489)

9:30 a.m.
Heteroclinic and periodic orbits for a class of singularly perturbed delay systems. I.
ShuiNee Chow*, Georgia Institute of Technology
Wenzhang Huang, Georgia Institute of Technology
(86334697)

Thursday January 17, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on History of Mathematics, II

7:00 a.m.
Women and mathematics at Cambridge in the late nineteenth century.
J. J. Tattersall*, Providence College
(86301130)

7:30 a.m.
The American mathematical community: 18911906.
Karen V. H. Parshall*, University of Virginia
Della Dumbaugh, University of Virginia
(8630137)

8:00 a.m.
Trends and traditions in collegiate mathematics: 19151990.
David E. Kullman*, Miami University, Oxford
(8630121)

8:30 a.m.
The philosophical views of Klein and Hilbert.
David E. Rowe*, Pace University, Westchester
(86301225)

9:00 a.m.
Mathematics and Nazi politics: Three examples.
Sanford L. Segal*, University of Rochester
(86301206)

9:30 a.m.
Bourbaki for physicists? A glance at some unrealized projects (19341954).
Liliane Beaulieu*, University of California, Berkeley and College de Rosemont, Canada
(8630179)

Thursday January 17, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Combinatorial Design Theory, III

7:00 a.m.
A few more Room frames.
J. H. Dinitz*, University of Vermont
D. R. Stinson, University of Nebraska, Lincoln
(86305339)

7:30 a.m.
Faithful enclosings of triple systems: A generalization of a theorem of Stern.
David C. Bigelow, University of Waterloo
Charles J. Colbourn*, University of Waterloo
(86305209)

8:00 a.m.
Designs and root finding.
S. A. Vanstone*, University of Waterloo
(86305335)

8:30 a.m.
Pairwise balanced designs: A block of specified size.
Alan Hartman, IBM, Israel
Katherine Heinrich*, Simon Fraser University
(86305415)

9:00 a.m.
Covering pairs by quintuples.
W. H. Mills*, Institute for Defense Analyses
R. C. Mullin, University of Waterloo
(86305238)

9:30 a.m.
Some new constructions and improved bounds for perfect secret sharing schemes.
Ernest F. Brickell*, Sandia National Laboratories, Albuquerque, New Mexico
Doug R. Stinson, University of Nebraska, Lincoln
(86305434)

Thursday January 17, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Boundary Behavior in Partial Differential Equations, III

7:00 a.m.
An elliptic inequality for nonsmooth domains and its application to the solution of Burger's equation.
Wenzheng Xie*, University of British Columbia
(86335362)

7:30 a.m.
Plane Stokes flow driven by capillarity on a moving free boundary.
Robert W. Hopper*, Lawrence Livermore National Laboratory, Livermore, California
(86376228)

8:00 a.m.
Boundary regularity for degenerate elliptic and parabolic equations.
Gary M. Lieberman*, Iowa State University
(86335582)

8:30 a.m.
Computation of wakes of ships in the presence of nonlinear waves.
Joel Davis, Oregon State University
Ronald Guenther*, Oregon State University
(86376260)

9:00 a.m.
Jet flow from a slot in a channel.
Alan R. Elcrat*, Wichita State University
Frederic Dias, Worcester Polytechnic Institute
(86335438)

9:30 a.m.
Behavior near t=0 of solutions of the Stokes and NavierStokes equations.
John G. Heywood*, University of British Columbia
(86335752)

Thursday January 17, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Hopf Algebras, III

7:00 a.m.
Hopf algebras and formal groups.
Lindsay Childs*, State University of New York, Albany
(86314695)

7:30 a.m.
Semisimple extensions and elements of trace 1.
Miriam Cohen*, BenGurion University of the Negev, Israel
Davida Fischman, Weizmann Institute of Science, Israel
(86316173)

8:00 a.m.
For unifying Hopf modules.
Yukio Doi*, Fukui University, Japan
(86316202)

8:30 a.m.
Biinvertible actions of Hopf algebras.
Susan Montgomery*, University of Southern California
(86316507)

9:00 a.m.
Hopf algebra actions.
Walter Ferrer Santos*, University of the Republic, Uruguay
(8631644)

9:30 a.m.
On inner actions of Hopf algebras and stabilizers of representations.
H.J. Schneider*, University M\"unchen, Federal Republic of Germany
(86316543)

Thursday January 17, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Real Algebraic Geometry, II

7:00 a.m.
Complexity of algorithms in real algebraic geometry.
MarieFrancoise Roy*, University of Rennes I, France
(86314365)

7:30 a.m.
Some computations in robotics from the real algebraic geometry.
Maria J. Gonz\'alez Lop\'ez, University of Cantabria, Spain
Tom\'as Recio*, University of Cantabria, Spain
(86314587)

8:00 a.m.
Orders on not necessarily formally real fields.
Ron Brown*, University of Hawaii, Honolulu
(86312546)

8:30 a.m.
Matrix orderings for noncommutative rings.
Thomas C. Craven*, University of Hawaii, Honolulu
(86314374)

9:00 a.m.
Orderings on noncommutative rings.
Victoria Powers*, Emory University
(86314533)

9:30 a.m.
Signatures of higher level on a commutative ring.
Susan Barton*, Pennsylvania State University, Media
(86313537)

Thursday January 17, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#2: Part B
The use of computing in teaching linear algebra
Organizers:
Eugene A. Herman, Grinnell College
Charles H. Jepsen, Grinnell College

Thursday January 17, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#5: Part B
Using pocket computers to enhance the teaching and learning of precalculus and calculus
Organizers:
Bert K. Waits, Ohio State University
Franklin Demana, Ohio State University

Thursday January 17, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Analysis, II

7:00 a.m.
Convergence of best simultaneous approximants.
Salem M. A. Sahab*, King Abdulaziz University, Saudi Arabia
(8634105)

7:15 a.m.
Piecewise linear approximations of smooth tensors.
John W. Barrett, University of Newcastle, England
Phillip E. Parker*, Wichita State University
(8634198)

7:30 a.m.
Coupled functional equations in distributions.
Elias Deeba*, University of Houston, Downtown
E. L. Koh, University of Regina
(86339568)

7:45 a.m.
Monotone and probabilistic wavelet approximation.
George Anastassiou, Memphis State University
Xiang Ming Yu*, Memphis State University
(86341813)

8:00 a.m.
Kadeclike results for orthonormal wavelet bases.
Grant V. Welland, University of Missouri, St.\ Louis
Bjorn Jawerth, University of South Carolina, Columbia
Kenneth F. Yarnall*, University of South Carolina, Columbia
(86342425)

8:15 a.m.
Entropy norms of random Fourier series.
W. Christopher Lang*, Mississippi State University
(86342465)

8:30 a.m.
On the RoeStrichartz characterization of eigenfunctions by boundedness conditions.
Ralph Howard, University of South Carolina, Columbia
Margaret Reese*, St Olaf College
(86342622)

8:45 a.m.
Geometrical dimension versus smoothness.
Anca Deliu*, Georgia Institute of Technology
Bj\"orn Jawerth, University of South Carolina, Columbia
(86342725)

9:00 a.m.
A generalized CantorLebesgue theorem.
J. Marshall Ash*, DePaul University
(86342742)

9:15 a.m.
Product formulas and convolutions for spheroidal wave functions.
W. C. Connett*, University of Missouri, St.\ Louis
A. L. Schwartz, University of Missouri, St.\ Louis
C. Markett, RheinischWest Technological University, Federal Republic of Germany
(86342855)

9:30 a.m.
Fourier transforms and Clifford algebras.
Tao Qian, Flinders University, Australia
Chun Li, Macquarie University, Australia
Alan McIntosh*, Macquarie University, Australia
(8634288)

9:45 a.m.
L_1(G)modules and multipliers.
Edward Thome*, Kansas State University
(86343440)

Thursday January 17, 1991, 7:00 a.m.8:40 a.m.
AMS Session on Convexity and Geometry

7:00 a.m.
Voronoi diagrams in Boolean algebras.
Robert A. Melter*, Long Island University, Southampton College
Sergiu Rudeanu, University of Bucharest, Romania
(86306358)

7:15 a.m.
Multimodularity and integer extreme points.
Irwin E. Schochetman*, Oakland University
(86352313)

7:30 a.m.
Infinite fully transitive polyhedra.
John M. Eisenlohr*, Ann Arbor, Michigan
(86352327)

7:45 a.m.
Iterated means of convex bodies.
R. J. Gregorac*, Iowa State University
(8635258)

8:00 a.m.
Neighborhoods and neighbors in tilings.
Julie D. Simon*, Middlebury College
(86352648)

8:15 a.m.
Basins of attraction of Newhouse sinks.
Thomas L. Richards*, Washington State University
(86352852)

8:30 a.m.
Applications of B(D, lambda)refinability to sum theorems and sigmaproducts.
J. C. Smith*, Virginia Polytechnic Institute and State University
(8635452)

Thursday January 17, 1991, 7:00 a.m.9:40 a.m.
AMS Session on Differential Geometry

7:00 a.m.
Computer graphics of helicoidal surfaces with constant mean curvature.
L. Richard Hitt, University of South Alabama
Ioannis M. Roussos*, Hamline University
(86353127)

7:15 a.m.
Submanifolds of almost rparacontact manifolds.
Andrzej Bucki*, Lycoming College
(86353133)

7:30 a.m.
Infinitesimal conformal transformations of Sasakian 3manifolds.
Ramesh Sharma*, University of New Haven
(86353247)

7:45 a.m.
The regularity of cut loci in simplyconnected surfaces.
James J. Hebda*, Saint Louis University
(86353491)

8:00 a.m.
Clairaut Lorentzian submersion.
Dean Allison*, Southern Illinois University, Carbondale
(86353341)

8:15 a.m.
Tubes in complex space forms.
Michael H. Vernon*, LewisClark State College
(86353634)

8:30 a.m.
Incidence algebra of polyhedra.
Beifang Chen*, State University of New York, Buffalo
(86353686)

8:45 a.m.
Harmonicity and the Gauss map.
Paul Sinclair*, Wichita State University
(86353816)

9:00 a.m.
Flat pseudoRiemannian manifolds with a nilpotent transitive group of isometries.
D. Duncan*, California State University, Fresno
E. Ihrig, Arizona State University
(8635384)

9:15 a.m.
Extrinsic upper bounds for eigenvalues of Diractype operators.
Nicolae Anghel*, University of North Texas
(8635395)

9:30 a.m.
A limiting eta invariant of sphere bundles and the signature theorem.
Sanjay Tiwari*, University of Wisconsin, Madison
(86353875)

Thursday January 17, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Algebraic Topology

7:00 a.m.
On ideals annihilating the bottom class of BP_*(cap lambda_i=1 ^n BZ/p^k).
George Nakos*, United States Naval Academy
(86355142)

7:15 a.m.
Cohomology classes associated to anomalies.
Gregory Peterson*, East Carolina University
(86355218)

7:30 a.m.
On the algebra structure of K(1)_*SO(2n+1).
Vidhy\=an\=ath K. Rao*, Ohio State University, Newark
(86355379)

7:45 a.m.
Maps from simplicial complexes to manifolds which are homotopic to embeddings.
Craig M. Johnson*, College of the Sequoias
(86355558)

8:00 a.m.
The ptorsion of the FarrellTate cohomology of the mapping class group cap gamma_p1.
Yining Xia*, Ohio State University, Columbus
(86355645)

8:15 a.m.
Links, braids and associated cohomology.
Stefanos P. Gialamas*, Columbia College
(86355713)

8:30 a.m.
Surgery obstructions of fiber bundles.
Justin R. Smith*, Drexel University
(86355748)

8:45 a.m.
Nielson theory of obstruction to deformation.
Robin B. Brooks*, Bates College
(86355788)

9:00 a.m.
A relative generalized Lefachetz number.
Brigitte NortonOdenthal, Bates College
Peter Wong*, Bates College
(86355817)

9:15 a.m.
Pullbacks of generalized Lefschetz numbers.
Brigitte NortonOdenthal*, Bates College
(86355818)

9:30 a.m.
On equivariant maps between oriented Grassmannians.
J. Korba\v s, Slovak Academy of Sciences, Czechoslovakia
P. Sankaran*, SPIC Science Foundation, Madras, India and University of Calgary
(86355394)

9:45 a.m.
Linking and unlinking properties of twobridge links.
Peter Kohn*, University of Texas, Austin
(86355210)

Thursday January 17, 1991, 7:00 a.m.9:40 a.m.
AMS Session on Number Theory and Field Theory

7:00 a.m.
Integral bases for Q(\root 8\alpha) and Q(\root 8 \ of {16\alpha}).
Robert Perlis, Louisiana State University, Baton Rouge
Sheng Chen*, Southwest Texas State University
(86311758)

7:15 a.m.
Predictable patterns in simple continued fractions.
Laura Clemens, Colorado College
Kathy Merrill, Colorado College
David Roeder*, Colorado College
(86311781)

7:30 a.m.
The sextic Gaussian period polynomial.
Andrew J. Lazarus*, University of California, Riverside
(86311791)

7:45 a.m.
Hofstadter's extraction conjecture.
Russell J. Hendel*, Dowling College
Sandra A. Monteferrante, Dowling College
(86311812)

8:00 a.m.
Uniform distribution of sequences in GF.
Peter JauShyong Shiue*, University of Nevada, Las Vegas
(86311826)

8:15 a.m.
Discrepancy and distance between sets.
Gerald Myerson*, Brigham Young University
(8631199)

8:30 a.m.
Spectra of derivations and identification of vector fields with polynomial flows.
Brian Coomes*, University of Miami
(86312430)

8:45 a.m.
Quintic forms over finite and local fields.
David B. Leep, University of Kentucky
Charles C. Yeomans*, University of Kentucky
(86312464)

9:00 a.m.
A Galois theory for transcendental field extensions.
Karin Deck*, University of North Carolina, Wilmington
(86312617)

9:15 a.m.
WittKernels for some function fields of curves.
Jonathan Shick*, Loyola University, New Orleans
(86312683)

9:30 p.m.
Generators for certain cyclic extensions of global function fields.
Robert C. Valentini*, California State University, Long Beach
(86312844)

Thursday January 17, 1991, 7:00 a.m.9:55 a.m.
MAA Session on Professional Development for Teachers of Mathematics, III

7:00 a.m.
Introduction

7:05 a.m.
Accelerated mathematics instruction for junior high students.
Paul Eenigenburg*, Western Michigan University

7:25 a.m.
Pedagogical issues arising from the use of technology in teaching precalculus mathematics at the high school level.
James Kulich*, Elmhurst College

7:45 a.m.
An endorsement program in mathematics: An idea whose time has come.
John L. Stedl*, Chicago State University

8:05 a.m.
A completely function based approach to the use of Mathematica in calculus.
Richard J. Tondra*, Iowa State University

8:25 a.m.
Mathematica with basic matrix applications.
Roosevelt Gentry*, Jackson State University
Jyoti Varma, Jackson State University

8:45 a.m.
Discussion

Thursday January 17, 1991, 7:00 a.m.9:45 a.m.
MAA Session on Humanistic Mathematics, III

7:00 a.m.
An ethnomathematical approach to designing a humanistic curriculum.
Gloria Gilmer*, MathTech, Inc., Milwaukee, Wisconsin

7:15 a.m.
Bridging the two cultures via Godel, Escher and Bach.
John W. Dawson, Jr.*, Pennsylvania State University, York

7:30 a.m.
Mathematics: Contributions by women (A mathematics course for liberal arts students).
Jacqueline M. Dewar*, Loyola Marymount University

7:45 a.m.
Student centered teaching.
Elena Anne Marchisotto*, California State University, Northridge

8:00 a.m.
A humanistic approach to lowerdivision sequences for science and mathematics majors.
Larry Copes*, Augsburg College
Beverly Stratton, Augsburg College

8:15 a.m.
The role of faith in mathematics.
Dick A. Wood*, Seattle Pacific University

8:30 a.m.
Humanistic mathematics pedagogy: Epistemological and mathematical ideas of nonWestern Cultures.
Arthur B. Powell*, Rutgers University, Newark
Marilyn Frankenstein, University of Massachusetts, Boston

8:45 a.m.
Discussion

Thursday January 17, 1991, 7:00 a.m.9:50 a.m.
MAA Session on Lesser Known Geometrical Gems, III

7:00 a.m.
Introduction

7:05 a.m.
Geometry of the ellipse.
Stanley Rabinowitz*, Westford, Massachusetts

7:30 a.m.
Segments of constant areas.
Serge Tabachnikov*, University of Arkansas, Fayetteville

7:45 a.m.
Convex curves in 1844.
James R. Smart*, San Jose State University

8:00 a.m.
Square wheels.
Leon Hall*, University of Missouri, Rolla
Stan Wagon, Macalester College

8:25 a.m.
Sets of constant width.
G. T. Sallee*, University of California, Davis

8:50 a.m.
Differentiability of convex functions.
James W. Petticrew*, University of TexasPan American

9:05 a.m.
Formation of affine hulls.
Victor Klee*, University of Washington

9:30 a.m.
Assorted geometrical gems.
Leon Bankoff*, Los Angeles, California

Thursday January 17, 1991, 7:15 a.m.8:15 a.m.
MAA Committee on Consultants Panel Discussion
Hints for consultants
Organizers:
Richard S. Millman,

Thursday January 17, 1991, 7:50 a.m.9:50 a.m.
AMS Special Session on Entire Function Theory, II

7:50 a.m.
Fourier transforms and the Laguerre inequalities.
George Csordas*, University of Hawaii, Honolulu
(86330190)

8:20 a.m.
A sharp form of the lemma on the logarithmic derivative.
Joseph Miles*, University of Illinois, UrbanaChampaign
(86330410)

8:50 a.m.
On linear differential equations with real zeros.
Franz Brueggemann*, University of Wisconsin, Madison
(86330409)

9:20 a.m.
Cartwright's theorem for harmonic functions.
Antoinette Trembinska*, John Jay College, City University of New York
(86330797)

9:40 a.m.
Informal Discussion

Thursday January 17, 1991, 8:00 a.m.8:50 a.m.
AWM Emmy Noether Lecture
Almost everywhere convergence: The case for the ergodic viewpoint.
Alexandra Bellow*, Northwestern University

Thursday January 17, 1991, 8:00 a.m.9:55 a.m.
MAA Session
Intervention projects for minority students
Organizers:
William Hawkins,

Thursday January 17, 1991, 8:30 a.m.9:55 a.m.
MAA Panel Discussion
Mathematics and the environment
Organizers:
Ben Fusaro, Salisbury State University
Marcia P. Sward, MAA

Thursday January 17, 1991, 9:00 a.m.10:00 a.m.
AWM Business Meeting

Thursday January 17, 1991, 9:05 a.m.9:55 a.m.
MAA Invited Address
What was Abel's theorem?
Harold M. Edwards*, Courant Institute of Mathematical Sciences, New York University

Thursday January 17, 1991, 10:10 a.m.11:00 a.m.
AMSAWMMAA Invited Address
Some nonstandard construction methods for local noetherian rings.
Christel Rotthaus*, Michigan State University

Thursday January 17, 1991, 11:00 a.m.12:00 p.m.
National Science Foundation Informal Discussion Group on Education

Thursday January 17, 1991, 12:00 p.m.1:00 p.m.
AMS Colloquium Lecture: Lecture II
Title to be announced.
Robert D. MacPherson*, Massachusetts Institute of Technology

Thursday January 17, 1991, 1:15 p.m.2:05 p.m.
AMS Invited Address
Recent results and open problems in deterministic nonlinear control theory.
Hector J. Sussmann*, Rutgers University, New Brunswick
(86393135)

Thursday January 17, 1991, 1:15 p.m.3:05 p.m.
AMSMAA Special Session on Research in Undergraduate Mathematics Education, III

1:15 p.m.
Engagement in mathematics problemsolving.
Frances Rosamond*, National University
(86398540)

1:45 p.m.
Mathematical experience and mental models of graphically presented data.
Curtis C. McKnight*, University of Oklahoma
Mark A. Fisher, University of Oklahoma
(86398208)

2:15 p.m.
Understanding how students acquire concepts underlying set formation.
Nancy Baxter*, Dickinson College
(86398103)

2:45 p.m.
Student constructions of mathematical concepts and visualization using computers.
Keith E. Schwingendorf*, Purdue University, West Lafayette
(86398315)

Thursday January 17, 1991, 1:15 p.m.3:15 p.m.
AMSMAA Special Session on Mathematics and Education Reform, I

1:15 p.m.
Varieties of educational experience in mathematics.
Naomi Fisher*, University of Illinois, Chicago
(86398227)

1:40 p.m.
Twenty years of experimentation.
David C. Kelly*, Hampshire College
(86398688)

2:05 p.m.
Teaching students to "think mathematically" in a problem solving course.
Alan H. Schoenfeld*, University of California, Berkeley
(86398338)

2:30 p.m.
Alliances, networks, collaboratives, coalitions: Will they last?
Joan R. Leitzel*, National Science Foundation
(86397316)

2:55 p.m.
Another intervention program.
Carolyn Mahoney*, California State University, San Marcos
(86397691)

Thursday January 17, 1991, 1:15 p.m.3:05 p.m.
AMS Special Session on Oscillation and Dynamics in Delay Equations, III

1:15 p.m.
Heteroclinic and periodic orbits for a class of singularly perturbed delay systems, II.
Wenzhang Huang*, Georgia Institute of Technology
(86334698)

1:45 p.m.
An invariant 2manifold for x'(t) = mu x(t) + f(x(t1)).
HansOtto Walther*, University of Munich, Federal Republic of Germany
(8633423)

2:15 p.m.
Difference differential equations in analytic number theory.
H. G. Diamond*, University of Illinois, UrbanaChampaign
H. Halberstam, University of Illinois, UrbanaChampaign
H.E. Richart, University of Ulm, Federal Republic of Germany
(86311644)

2:45 p.m.
Oscillations of second order neutral differential equations with deviating arguments.
S. J. Bilchev, Technical University, Bulgaria
M. K. Grammatikopoulos*, University of Ioannina, Greece
I. P. Stavroulakis, University of Ioannina, Greece
(86334861)

Thursday January 17, 1991, 1:15 p.m.3:05 p.m.
AMS Special Session on Arithmetical Algebraic Geometry, I

1:15 p.m.
Heights and triple product Lfunctions.
Benedict H. Gross*, Harvard University
(8631141)

1:45 p.m.
Adelic and local Galois representations attached to points on canonical models.
Alice Silverberg*, Harvard University
(8631486)

2:15 p.m.
Base change and the Birch and SwinnertonDyer conjecture.
M. Ram Murty, McGill University
V. Kumar Murty*, University of Toronto
(86311261)

2:45 p.m.
Complex multiplication by cyclotomic fields.
B. Dodson*, Lehigh University
(86311240)

Thursday January 17, 1991, 1:15 p.m.3:15 p.m.
MAA Minicourse \#7: Part A
Symmetry analysis of repeated patterns
Organizers:
Donald W. Crowe, University of Wisconsin, Madison

Thursday January 17, 1991, 1:15 p.m.3:15 p.m.
MAA Minicourse \#8: Part A
The theory and application of discrete dynamics
Organizers:
James T. Sandefur, Georgetown University

Thursday January 17, 1991, 1:15 p.m.3:15 p.m.
MAA Minicourse \#9: Part A
Combinatorial designs
Organizers:
Walter D. Wallis, Southern Illinois University

Thursday January 17, 1991, 1:15 p.m.3:10 p.m.
AMS Session on Combinatorics, I

1:15 p.m.
Recognition of formal signs by function: Form and rank.
Miriam LipschutzYevick*, Rutgers University, Newark
(86303151)

1:30 p.m.
Sintersection families in semilattices.
D. K. RayChaudhuri, Ohio State University, Columbus
Tianbao Zhu*, Ohio State University, Columbus
(8630504)

1:45 p.m.
Variations on Goulden's proof of JacobiTrudi.
David Bressoud, Pennsylvania State University, University Park
ShiYuan Wei*, Pennsylvania State University
(86305108)

2:00 p.m.
Selfdual embeddings of complete bipartite graphs.
Dan Archdeacon, University of Vermont
Nora Hartsfield*, Western Washington University
(86305138)

2:15 p.m.
The traveling salesman problem for a prime number of cities.
Richard H. Warren*, General Electric Company, King of Prussia, Pennsylvania
(86305149)

2:30 p.m.
On the smallest groupdivisible designs.
GuoHui Zhang*, Sonoma State University
(86305150)

2:45 p.m.
Permutationpartition pairs,III: Embedding distributions of linear families of graphs.
Saul Stahl*, University of Kansas
(86305279)

3:00 p.m.
Local motions in three orthogonal Latin squares.
Raymond Killgrove*, Alhambra, California
Robert Sternfeld, Indiana State University
(86305354)

Thursday January 17, 1991, 1:15 p.m.2:55 p.m.
AMS Session on Algebra, I

1:15 p.m.
Quasihereditary endomorphism algebras.
V. H. Dlab*, Carleton University
C. M. Ringel, Universit\"at Bielefeld, Federal Republic of Germany
(86316866)

1:30 p.m.
Chain conditions for strongly graded rings.
Manuel Saorin Castano*, University of Murcia, Spain
(86316815)

1:45 p.m.
Endomorphism rings of Artinian modules.
Efraim P. Armendariz*, University of Texas, Austin
Jae Keol Park, Busan National University, Korea
(86316751)

2:00 p.m.
Chain conditions for modules over perfect rings.
Ravinder Kumar*, Alcorn State University
S. B. Malik, Delhi University, India
(86316736)

2:15 p.m.
Locally prime rings and the infinite version of the WedderburnArtin theorem.
Hossain Khabazian*, Isfahan University of Technology, Iran
(8631659)

2:30 p.m.
Weakly tame nearrings.
Gary L. Peterson*, James Madison University
(86316353)

2:45 p.m.
Commutativity of rings.
Hal Moore, Brigham Young University
Adil Yaqub*, University of California, Santa Barbara
(86316346)

Thursday January 17, 1991, 1:15 p.m.2:25 p.m.
AMS Session on History and Education

1:15 p.m.
A comparison between Emilie du Chatelet and Sophie Germain.
Una Bray*, Skidmore College
(86301119)

1:30 p.m.
Helge von Koch.
Thomas E. Bengtson*, Augustana College
(86301457)

1:45 p.m.
Bernoulli's method for finding a root of a polynomial.
John Blanton*, Saint John Fisher College
(86301572)

2:00 p.m.
Who invented spinors.
John Synowiec*, Indiana University, Northwest
(8630196)

2:30 p.m.
On mathematical education: Why analogy is so vital to the university's curricular success.
G. Arthur Mihram*, University of Southern California
Danielle Mihram, University of Southern California
(8630329)

Thursday January 17, 1991, 1:15 p.m.3:20 p.m.
MAA Session on Humanistic Mathematics, IV

1:15 p.m.
The Algebra Project: An experientially based curriculum.
Bill Crombie*, The Algebra Project

1:30 p.m.
Revisiting mathematics: A humanistic approach.
G. Joseph Wimbish*, Huntingdon College

1:45 p.m.
How we can make our math classrooms be safe places for adults to learn.
Linda D. Falstein*, University of Massachusetts, Boston

2:00 p.m.
Can problem solving be taught humanely?
Peter Flusser*, Kansas Wesleyan University

2:15 p.m.
Open Forum

Thursday January 17, 1991, 1:15 p.m.2:55 p.m.
MAA Session on Lesser Known Geometrical Gems, IV

1:15 p.m.
Introduction

1:20 p.m.
Exercises on Miquel's theorem.
William E. Fenton*, Bellarmine College

1:45 p.m.
Notched cube tilings in nspace.
Sherman Stein*, University of California, Davis

2:10 p.m.
An area formula for polygons with vertices on the hexlattice.
John R. Reay*, Western Washington University

2:35 p.m.
Jacobi's theorem(?) on space curves.
William J. Firey*, Oregon State University

Thursday January 17, 1991, 1:15 p.m.3:20 p.m.
MAA Committee on Computers in Mathematics Education Panel Discussion
The laboratory approach to teaching calculus
Organizers:
L. Carl Leinbach, Gettysburg College
s:
Donna Beers, Simmons College
Eric Muller, Brock University
Anita Solow, Grinnell College

Thursday January 17, 1991, 1:15 p.m.3:20 p.m.
MAA CUPM Subcommittee on Undergraduate Research in Mathematics Poster Session
Undergraduate student projects
Lester J. Senechal,

Thursday January 17, 1991, 1:15 p.m.3:15 p.m.
MAA Committee on Student Chapters Workshop: Part A
Chaos, fractals, and dynamics\endash Computer experiments in mathematics
Organizers:
Marilyn Durkin, Bentley College

Thursday January 17, 1991, 1:15 p.m.3:20 p.m.
AWM Workshop for Graduate Students

Thursday January 17, 1991, 1:45 p.m.3:20 p.m.
MAA Session on Handson Strategies in Teaching College Mathematics, I

1:45 p.m.
Collaborative learning.
Humberto Canate*, Hostos Community College (CUNY)

2:10 p.m.
Learning and teaching mathematics through touching, talking, and exploring.
Robert Gyles*, Community School District 4, New York, New York

2:35 p.m.
Using Logo to create a Navajo blanket design.
Claudette Bradley*, University of Alaska, Fairbanks

3:00 p.m.
Using computers to build mathematical ideas.
Ed Dubinsky*, Purdue University, West Lafayette

Thursday January 17, 1991, 2:15 p.m.3:05 p.m.
AMS Special Session on Computing Optimal Geometries, I

2:15 p.m.
Crystalline interfacecontrolled crystal growth models: Theory and computation.
Jean E. Taylor*, Rutgers University, New Brunswick
(86373417)

2:45 p.m.
Modeling and simulations of crystal growth.
Ryo Kobayashi*, Ryukoku University, Japan
(86368766)

Thursday January 17, 1991, 2:20 p.m.3:10 p.m.
AMS Invited Address
Matrix searching and its applications.
Maria M. Klawe*, University of British Columbia
(86368810)

Thursday January 17, 1991, 3:35 p.m.5:10 p.m.
AMS Business Meeting

Thursday January 17, 1991, 6:00 p.m.8:00 p.m.
MAA Minicourse \#10: Part A
Chaotic dynamical systems
Organizers:
Robert L. Devaney, Boston University

Thursday January 17, 1991, 6:00 p.m.8:00 p.m.
MAA Minicourse \#6: Part B
Pedagogical uses of Derive and GyroGraphics
Organizers:
Jerry Johnson, Oklahoma State University
Benny Evans, Oklahoma State University

Thursday January 17, 1991, 6:00 p.m.8:25 p.m.
AMS Session on Combinatorics, II

6:00 p.m.
Counting tilings by dominoes.
J. Propp*, Massachusetts Institute of Technology
(86305419)

6:15 p.m.
Combinatorial properties of finite, upper halfplanes.
Nancy Celniker*, University of California at San Diego, La Jolla
(86305429)

6:30 p.m.
Counting of paths and coefficients of Hilbert polynomial.
Devadatta M. Kulkarni*, Oakland University
(86305443)

6:45 p.m.
Lattice paths to hyperplanes.
Richard Grassl*, Muhlenberg College
K. A. Johnson, Lafayette College
(86305451)

7:00 p.m.
Surgical techniques for imbedding graphs.
David L. Craft*, Western Michigan University
(86305467)

7:15 p.m.
The two basic linear time planarity algorithms.
Laura Bloom*, University of California at San Diego, La Jolla
(86305470)

7:30 p.m.
Hamilton circuits in Cayley diagraphs of abelian and dihedral groups.
Stephen Curran*, University of North Texas
(86305475)

7:45 p.m.
Random mappings with specified numbers of loops.
Bernard Harris*, University of Wisconsin, Madison
(86305518)

8:00 p.m.
Double vertex graphs.
Yousef Alavi*, Western Michigan University
Mehdi Behzad, Western Michigan University
Paul Erd\"os, Hungarian Academy of Sciences, Hungary
Don R. Lick, Eastern Michigan University
(86305521)

8:15 p.m.
A 1factorization of the middle level of 2^X.
Hunter S. Snevily*, University of Illinois, UrbanaChampaign
(86305616)

Thursday January 17, 1991, 6:00 p.m.8:55 p.m.
AMS Session on Commutative Algebra, I

6:00 p.m.
Rings with minimal ideals.
Tilak De Alwis*, Southeastern Louisiana University
(86313132)

6:15 p.m.
Coherence of daggercompleted structure sheaf.
Goro Kato*, California Polytechnic State University
(86313207)

6:30 p.m.
A PruferKulikov type theorem on valuation domains.
Laszlo Fuchs*, Tulane University
(86313252)

6:45 p.m.
Triangular derivations of polynomial rings.
Martha K. Smith*, University of Texas, Austin
(86313367)

7:00 p.m.
Torsionfree modules over regular domains of dimension two.
Roger Wiegand*, University of Nebraska, Lincoln
(86313439)

7:15 p.m.
On the power polynomial X^d over Galois rings.
Javier GomezCalderon*, Pennsylvania State University, New Kensington Campus
(86313462)

7:30 p.m.
Some remarks on completion of a quasi local ring.
J. H. Kim*, East Carolina University
(86313487)

7:45 p.m.
Factorization and the cap phifunction on Dedekind domains.
Scott Chapman*, Trinity University
William W. Smith, University of North Carolina, Chapel Hill
(86313490)

8:00 p.m.
Nonfree projective modules.
Joe Yanik*, Emporia State University
(8631355)

8:15 p.m.
Orderings and realvalued preplaces on rings.
Kenneth G. Valente*, Colgate University
(86313585)

8:30 p.m.
On orderings and Vvaluation theory for rings.
Marie A. Vitulli*, University of Oregon
(86313586)

8:45 p.m.
On quasicyclic submodules.
Johnny A. Johnson, University of Houston
Monty B. Taylor*, University of TexasPan American
(86313597)

Thursday January 17, 1991, 6:00 p.m.8:25 p.m.
AMS Session on Linear Algebra

6:00 p.m.
Coprime factorizations with factors having minimal McMillan degree.
Joseph Ball, Virginia Polytechnic Institute and State University
Jeongook Kang*, Virginia Polytechnic Institute and State University
Leiba Rodman, College of William and Mary
Madanpal Verma, McGill University
(86315821)

6:15 p.m.
The group of units of a checkered matrix ring and its application in public key cryptosystem.
Chul Kim*, University of South Dakota
(86320494)

6:30 p.m.
On Hnormal and BlockToeplitz Hnormal operators.
Israel C. Gohberg, Tel Aviv University, Israel
Boris Reichstein*, Catholic University of America
(86315795)

6:45 p.m.
Periods and subperiods of matrices.
William P. Wardlaw*, United States Naval Academy
(86315668)

7:00 p.m.
A determinantal description of GCDclosed sets and ksets.
Zhongshan Li*, North Carolina State University
(86315483)

7:15 p.m.
The Jordan form of certain block triangular matrices.
C. R. Johnson, College of William & Mary
E. A. Schreiner*, Western Michigan University
(86315458)

7:30 p.m.
On GCD and LCM matricies.
Keith Bourque*, University of Southwestern Louisiana
Steve Ligh, University of Southwestern Louisiana
(86315445)

7:45 p.m.
Nonconvexity of permanental numerical range.
ShuAn Hu*, University of Connecticut, Storrs
James F. Hurley, University of Connecticut, Storrs
(86315320)

8:00 p.m.
Equality cases in matrix exponential inequalities.
Wasin So*, University of California, Santa Barbara
(86315280)

8:15 p.m.
Zeroone circulant matrices.
Dale Woods*, Central State University
D. J. Boyce, Central State University
(86315275)

Thursday January 17, 1991, 6:00 p.m.8:55 p.m.
AMS Session on Ordinary Differential Equations, I

6:00 p.m.
Parabolic equations in several space variables.
Peter A. McCoy*, United States Naval Academy
(86335187)

6:15 p.m.
Some second order nonlinear systems arising in natural convection flow and heat transfer.
K. Vajravelu*, University of Central Florida
R. N. Mohapatra, University of Central Florida
E. Soewono, Jurusan Matematika, Bandung, Republic of Indonesia
(86334796)

6:30 p.m.
Boundedness properties and perturbing Lyapunov functions.
Semen Koksal*, Florida Institute of Technology
(86334778)

6:45 p.m.
On the construction of solutions to differential equations in the complex domain.
Enid Steinbart*, University of New Orleans
(86334754)

7:00 p.m.
A technique in perturbation theory.
S. Sivasundaram*, EmbryRiddle Aeronautical University
(8633408)

7:15 p.m.
The periods of a simple mechanical system.
David Hart*, University of Cincinnati
(86334724)

7:30 p.m.
Monotone iterative technique for delay differential systems.
Josaphat A. Uvah*, University of West Florida
(86334721)

7:45 p.m.
Bounded perturbations with multiple delays of forced harmonic oscillators at resonance.
R. Kent Nagle*, University of South Florida
Mary E. Parrott, University of South Florida
(86334712)

8:00 p.m.
Applications of the implicit function theorem in the study of boundary value problems.
Gerhard Metzen*, Memphis State University
(86334679)

8:15 p.m.
On solution of some difference equations.
Prem N. Bajaj*, Wichita State University
(86334664)

8:30 p.m.
Pure imaginary roots of the transcendental equation associated with a certain delay differential equation.
A. J. Tamraz*, Wichita State University
(86334662)

8:45 p.m.
On multitime method for stochastic systems.
J. Golec*, Fordham University
G. Ladde, University of Texas, Arlington
(86334618)

Thursday January 17, 1991, 6:00 p.m.8:55 p.m.
AMS Session on Manifolds and Global Analysis

6:00 p.m.
Higher order Grassmann manifolds.
Gregory A. Fredricks*, Lewis & Clark College
(86357450)

6:15 p.m.
Sections of oriented bundles.
Howard Osborn*, University of Illinois, UrbanaChampaign
(86357613)

6:30 p.m.
An elementary proof of the asphericity of some knot complements.
Ronald J. Knill*, Tulane University
(86357614)

6:45 p.m.
Distinguishing 2complexes with the same homotopy groups.
M. Paul Latiolais, Portland State University
Nancy Waller*, Portland State University
(86357660)

7:00 p.m.
Distinguishing presentations of finite fundamental groups of 3manifolds.
M. Paul Latiolais*, Portland State University
(86357745)

7:15 p.m.
Almost acyclic degree 1 maps of manifolds.
Frederick C. Tinsley*, Colorado College
(86357782)

7:30 p.m.
Pseudoorbit shadowing on the unit interval.
Timothy J. Pennings*, Hope College
Jeffrey A. Van Eeuwen, Hope College
(86358185)

7:45 p.m.
Equivariant multiparameter bifurcation via singularity theory.
Ali LariLavassani*, Ohio State University, Columbus
Yung Chen Lu, Ohio State University, Columbus
(8635839)

8:00 p.m.
Dimensionality of invariant sets for nonautonomous processes.
Tepper L. Gill, Howard University
W. W. Zachary*, Howard University
(86358397)

8:15 p.m.
Multiple solutions and asymptotic behavior on a similarity equation from a boundarylayer flow.
Chunqing Lu*, Southern Illinois University, Edwardsville
(86334496)

8:30 p.m.
Orientation reversing homeomorphisms.
Morton Brown*, University of Michigan, Ann Arbor
(86358524)

8:45 p.m.
Stability and topological entropy.
Romeo F. Thomas*, EmbryRiddle Aeronautical University
(86358608)

Thursday January 17, 1991, 6:00 p.m.8:55 p.m.
AMS Session on Probability Theory

6:00 p.m.
On the law of the iterated logarithm for martingales.
Evan Fisher*, Lafayette College
(86360272)

6:15 p.m.
A pathology in multidimensional quantization.
Eric B. Hall, Southern Methodist University
Gary L. Wise*, University of Texas, Austin
(86360372)

6:30 p.m.
Symmetry groups for random vectors.
Mark M. Meerschaert*, Albion College
(8636049)

6:45 p.m.
White noise and stochastic differentiation.
Mylan Redfern, University of Southern Mississippi
David Betounes*, University of Southern Mississippi
(86360500)

7:00 p.m.
Onesided refinements of the strong law of large numbers and the GlivenkoCantelli theorem.
David Gilat, Tel Aviv University, Israel
Theodore P. Hill*, Georgia Institute of Technology
(86360556)

7:15 p.m.
Rapid approximation of the Erlang loss function.
Thomas F. Potter*, Telco Research Corporation, Nashville, Tennessee
(86360589)

7:30 p.m.
Weak convergence of nonidentical, probability measures on compact semigroups with applications to interated function systems.
Gregory Budzban*, Martin Marietta Aerospace, Orlando, Florida
(86360595)

7:45 p.m.
Autoregressive expansion of linear predicator for stationary stochastic processes.
Jamshid Farshidi*, Michigan State University
(86360667)

8:00 p.m.
Propagation of chaos.
G. Kallianpur, University of North Carolina, Chapel Hill
P. Sundar*, Louisiana State University, Baton Rouge
(86360671)

8:15 p.m.
Random algebraic polynomials.
Henry Gore*, Morehouse College
Masilamani Sambandham, Morehouse College
(86360715)

8:30 p.m.
Random trigonometric polynomials.
Masilamani Sambandham*, Morehouse College
(86360719)

8:45 p.m.
Convergence properties of random variables associated with an infinite urn model.
Michael Dutko*, Pennsylvania State University, Dunmore
(86360814)

Thursday January 17, 1991, 6:00 p.m.8:55 p.m.
AMS Session on Numerical Analysis

6:00 p.m.
On the convergence of algorithmic models.
Ioannis Argyros*, Cameron University
(86365216)

6:15 p.m.
Numerical methods for a class of twopoint boundary value problems and their implementation on MIMD parallel computers.
Chittaranjan Katti*, Texas A\thsp\&\thsp M University, College Station
Sabita Nath, Nehru University, India
(86365257)

6:30 p.m.
Generalized linear multistep methods.
Leon Arriola*, Old Dominion University
(86365321)

6:45 p.m.
The numerical solution of a singularly perturbed hyperbolic problem with nonlocal nonlinearity.
Benjamin F. Esham, Jr., State University of New York, College at Geneseo
Elizabeth G. Yanik*, Emporia State University
(86365448)

7:00 p.m.
Least squares methods to minimize errors in a smooth, strictly convex norm on R^m.
Robert W. Owens*, Lewis & Clark College
V. P. Sreedharan, Michigan State University
(86365449)

7:15 p.m.
Numerical solution of weakly singular Volterra equations.
Bruce V. Riley*, University of Wisconsin, La Crosse
(86365456)

7:30 p.m.
Three parameter SOR method.
Saadat Moussavi*, University of Wisconsin, Oshkosh
(86365590)

7:45 p.m.
The truncation error of the trapezoidal integral formula with function binomial coefficient.
Constant Goutziers*, State University of New York, College at Oneonta
(86365591)

8:00 p.m.
Regularization of an illposed linear operator equation.
C. W. Groetsch*, University of Cincinnati
(86365710)

8:15 p.m.
Discrete optimization using continuous methods.
Ronald Sverdlove*, David Sarnoff Research Center, Inc., Princeton, New Jersey
Roger Crane, David Sarnoff Research Center, Inc., Princeton, New Jersey
(86365711)

8:30 p.m.
Parallel algorythm for 3D inverse problem of wave equation in geophysics.
Ganquan Xie*, Hunan Computer Technology, Inc., ChangSha, People's Republic of China
(86365737)

8:45 p.m.
A numerical method for solving Cauchy singular integral equations.
Jianhua Li*, State University of New York, Stony Brook
(86365749)

Thursday January 17, 1991, 6:00 p.m.9:10 p.m.
AMS Session on Optimization and Applications

6:00 p.m.
A procedure for parameter estimation of a nonlinear model.
G. R. DargahiNoubary*, Bloomsburg University of Pennsylvania
(86370214)

6:15 p.m.
A derivation of degenerate von Karman equations for strongly anisotropic plates.
Robert G. Root*, Vassar College
(86373548)

6:30 p.m.
A geometric formulation of the Higgs mechanism.
Andrew V. Talmadge*, Arkansas State University
(86381515)

6:45 p.m.
On Schodinger initial value problem.
Raghu R. Gompa*, Indiana University, Kokomo
(8638168)

7:00 p.m.
An application of number theory to a class of aperiodic Ising models.
Ramin Vakilian*, California State University, Northridge
(86382631)

7:15 p.m.
Generating solutions of Einstein's equations.
Hernando Quevedo*, University of Cologne, Federal Republic of Germany
(86383401)

7:30 p.m.
Optimization over the set of Paretooptimal solutions.
Jerald P. Dauer, University of Tennessee, Chattanooga
Timothy A. Fosnaugh*, Emporia State University
(86390523)

7:45 p.m.
Search game on an odd number of arcs with immobile hider.
Pavlovi\'c Ljiljana*, Faculty of Natural Sciences and Mathematics, Yugoslavia
(86390574)

8:00 p.m.
Estimating flow values from aggregate data in undetermined systems.
Lala B. Krishna, University of Akron
Richard W. Janson*, Kent State University, Kent
(8639074)

8:15 p.m.
The nonatomic assignment model.
Neil E. Gretsky*, University of California, Riverside
Joseph M. Ostroy, University of California, Los Angeles
William R. Zame, State University of New York, Buffalo and Johns Hopkins University, Baltimore
(86390750)

8:30 p.m.
Modeling the relative frequency of dinucleotides in DNA.
Murk Bottema*, Winona State University
(86392557)

8:45 p.m.
Computer generation of nonconvex generalized numerical ranges.
Christopher Carl Heckman*, University of Nebraska, Lincoln
ChiKwong Li, College of William and Mary
(86315624)

9:00 p.m.
Quantum YangMills on a Riemann surface.
Dana Fine*, Southeastern Massachusetts University
(86381685)

Thursday January 17, 1991, 6:00 p.m.7:00 p.m.
Joint Policy Board for Mathematics Session

Thursday January 17, 1991, 6:00 p.m.9:00 p.m.
AMSMAA Panel Discussion
The undergraduate linear algebra curriculum
Friday January 18, 1991

Friday January 18, 1991, 7:00 a.m.9:50 a.m.
AMSMAA Special Session on Research in Undergraduate Mathematics Education, IV

7:00 a.m.
Students' conceptions of infinity in the calculus.
Gontran Ervynck*, Catholic University, Leuven, Belgium
(86398231)

7:30 a.m.
A Krutetskiian perspective on and cognitive obstacles to the learning of calculus.
F. Alexander Norman*, University of North Carolina, Charlotte
Mary Kim Prichard, University of North Carolina, Charlotte
(86398147)

8:00 a.m.
Calculus courses and their conceptual residue.
Shlomo Vinner*, Hebrew University, Isreael
(86398580)

8:30 a.m.
Research in calculus learning: Understanding of limits, derivatives, and integrals.
Joan FerriniMundy*, University of New Hampshire
Karen Graham, University of New Hampshire
(86398197)

9:00 a.m.
Informal Discussion

Friday January 18, 1991, 7:00 a.m.9:50 a.m.
AMSMAA Special Session on Mathematics and Education Reform, II

7:00 a.m.
Successful mathematics programs at the University of Texas at Austin.
Michael Starbird*, University of Texas, Austin
(86398526)

7:30 a.m.
Mr. Pythagoras goes to Hollywood.
Tom M. Apostol*, California Institute of Technology
(86397226)

8:00 a.m.
Calculus reform: Changing students' perceptions of mathematics from mimicing to thinking.
Deborah Hughes Hallett*, Harvard University
(86398860)

8:30 a.m.
The San Antonio prefreshman engineering program: A mathematics based minority intervention program.
Manuel Berriozabal*, University of Texas, San Antonio
(8639751)

9:00 a.m.
Mathematics education reform: Hard lessons learned well.
Shirley A. Hill*, University of Missouri, Kansas City
(86398834)

9:30 a.m.
Can mathematicians be involved in education and still survive in the profession?
Harvey B. Keynes*, University of Minnesota, Minneapolis
(86398178)

Friday January 18, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Computing Optimal Geometries, II

7:00 a.m.
Generalized motion by mean curvature.
Lawrence Evans*, University of California, Berkeley
Joel Spruck, University of Massachusetts, Amherst
(86349230)

7:30 a.m.
Computing the motion of curves and surfaces via the HamiltonJacobi level set approach: I.
James A. Sethian*, University of California, Berkeley
(86368293)

8:00 a.m.
Computing the motion of curves and interfaces via the HamiltonJacobi level set approach,II.
Stanley Osher*, University of California, Los Angeles
(86365229)

8:30 a.m.
Computation of evolving phase interfaces with GibbsThompson effect.
Robert F. Almgren*, New York UniversityCourant Institute of Mathematical Sciences
(86349332)

9:00 a.m.
The deformation of crystals modeled by nonconvex variational principles.
Mitchell Luskin*, University of Minnesota, Minneapolis
Charles Collins, University of Michigan, Ann Arbor
(86365184)

9:30 a.m.
Soap films and immiscible fluids.
Gary R. Lawlor, Princeton University
Frank Morgan*, Williams College
(86349194)

Friday January 18, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Arithmetical Algebraic Geometry, II

7:00 a.m.
On Euler systems.
Dinakar Ramakrishnan*, California Institute of Technology
(86311301)

7:30 a.m.
Algebraic cycles in families of abelian varieties over HilbertBlumenthal surfaces.
B. Brent Gordon*, University of Oklahoma
(86311538)

8:00 a.m.
Representations of integers by certain quaternary quadratic forms.
Isabelle Pays*, University of Washington
(86311291)

8:30 a.m.
Height pairing of higher dimensional cycles and the heat kernel.
Bruno Harris*, Brown University
(86311873)

9:00 a.m.
Average values of Lfunctions in function fields.
Michael Rosen*, Brown University
(86311180)

9:30 a.m.
A family of cyclic quartic fields arising from modular curves.
Lawrence C. Washington*, University of Maryland, College Park
(86311233)

Friday January 18, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Real Algebraic Geometry, III

7:00 a.m.
Robinson's form and Hilbert's theorem.
Bruce Reznick*, University of Illinois, UrbanaChampaign
(86314874)

7:30 a.m.
Witt rings under odd degree extensions.
Robert W. Fitzgerald*, Southern Illinois University, Carbondale
(86311183)

8:00 a.m.
Quaternion identities.
Joseph Yucas*, Southern Illinois University, Carbondale
(86312373)

8:30 a.m.
Pro2Demuskin groups of rank aleph_0 as Galois groups of maximal 2extensions of fields.
Jan Minac, University of Western Ontario
Roger Ware*, Pennsylvania State University, University Park
(86312281)

9:00 a.m.
Witt rings and Galois groups.
Tara L. Smith*, Ohio State University, Columbus
(86312283)

9:30 a.m.
Stable decompositions of division algebras with involution.
Maurice Chacron, Carleton University
H\'el\`ene Dherte, University Catholique de Louvain, Belgium
JeanPierre Tignol*, University Catholique de Louvain, Belgium
Adrian Wadsworth, University of California at San Diego, La Jolla
(86316381)

Friday January 18, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#12: Part A
Writing in mathematics courses
Organizers:
George D. Gopen, Duke University
David A. Smith, Duke University

Friday January 18, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#7: Part B
Symmetry analysis of repeated patterns
Organizers:
Donald W. Crowe, University of Wisconsin, Madison

Friday January 18, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#8: Part B
The theory and application of discrete dynamics
Organizers:
James T. Sandefur, Georgetown University

Friday January 18, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#9: Part B
Combinatorial designs
Organizers:
Walter D. Wallis, Southern Illinois University

Friday January 18, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Complex Analysis, I

7:00 a.m.
Square iterable univalent functions.
Kent Pearce*, Texas Tech University
(86330169)

7:15 a.m.
Distance decreasing functions.
H. S. Bear*, University of Hawaii, Honolulu
(86330251)

7:30 a.m.
On the valence of some classes of harmonic maps.
Abdallah Lyzzaik*, Kuwait University, Kuwait
(8633011)

7:45 a.m.
On factorization of entire functions satisfying differential equations.
ChungChun Yang*, Hong Kong University of Science and Technology, Hong Kong
H. Urabe, Kyoto University, Japan
(86330140)

8:00 a.m.
Green's function as an interpolating tool.
Ahmed I. Zayed*, University of Central Florida
(86330161)

8:15 a.m.
Inner chordarc domains.
Manouchehr Ghamsari*, University of Cincinnati
(86330186)

8:30 a.m.
Euclidean linear invariance and uniform local convexity.
Wancang Ma*, University of Cincinnati
David Minda, University of Cincinnati
(86330196)

8:45 a.m.
Distortion theorems for euclidean kconvex functions.
Wancang Ma, University of Cincinnati
Diego Mejia, Universidad Nacional de Medellin, Colombia
David Minda*, University of Cincinnati
(86330400)

9:00 a.m.
On uniformly convex functions.
A. W. Goodman*, University of South Florida
(86330198)

9:15 a.m.
A sum over the zeros of partial sums of e^x.
C. Yalcin Yildirim*, Bilkent University, Turkey
(86330244)

9:30 a.m.
Extremal distance and estimates of harmonic measure applied to conformal mapping.
Thomas K. DeLillo*, Wichita State University
John A. Pfaltzgraff, University of North Carolina, Chapel Hill
(86330284)

Friday January 18, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Orders and Lattices

7:00 a.m.
A variety of latticeordered groups containing all representable covers of the abelian variety.
M. Anderson, Colorado College
M. Darnel, Indiana University, South Bend
T. Feil*, Denison University
(86306426)

7:15 a.m.
Knowledge approximation algebras.
Stephen D. Comer*, The Citadel
(86306235)

7:30 a.m.
Tilings with the neighborhood property.
Linda Fosnaugh*, University of Nebraska, Lincoln
(86305453)

7:45 a.m.
Graph product and covering graphs.
Ghidewon Abay Asmerom*, Western Michigan University
(86305468)

8:00 a.m.
The lower half of the partition lattice is Sperner.
Joseph P.S. Kung*, University of North Texas
(86306287)

8:15 a.m.
Order, genus, and diagram invariance.
Kevin Ewacha*, University of Ottawa
Weixuan Li, University of Ottawa
Ivan Rival, University of Ottawa
(86306349)

8:30 a.m.
Sums of semiprime, z and d lideals.
Suzanne Larson*, Loyola Marymount University
(86306405)

8:45 a.m.
On generalized partitions and posets.
ZhuXin Hu*, University of Illinois, UrbanaChampaign
(86306424)

9:00 a.m.
When is every order ideal a ring ideal?
M. Henriksen*, Harvey Mudd College
(86306579)

9:15 a.m.
Sums of lattice homomorphisms.
S. J. Bernau*, University of Texas, El Paso
C. B. Huijsmans, University of Leiden, The Netherlands
B. dePagter, Delft University of Technology, The Netherlands
(86306600)

9:30 a.m.
On epicompletions of Archimedian latticeordered groups.
Ann Kizanis*, Wesleyan University
(86306767)

9:45 a.m.
On generalized perfect graphs: Inverting perfection.
Ann N. Trenk*, Johns Hopkins University, Baltimore
(86305330)

Friday January 18, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Algebra, II

7:00 a.m.
Chains of subgroups in Lie type groups.
Douglas Brozovic*, Ohio State University, Columbus
(86320145)

7:15 a.m.
Automorphisms of skew polynomial rings.
Mary Rosen*, California State University, Northridge
Jerry Rosen, California State University, Northridge
(86316126)

7:30 a.m.
Derivations of differential operator rings.
Jerry Rosen*, California State University, Northridge
Mary Rosen, California State University, Northridge
(86316125)

7:45 a.m.
Global dimensions of rings with Krull dimension.
John Koker*, State University of New York, College at Potsdam
(86317674)

8:00 a.m.
Braiding structure on A(R).
Jacob Towber*, DePaul University
(86320740)

8:15 a.m.
The preservation of the semiprime Goldie property by strong semilattice sums.
YueChan P. Ho*, University of Iowa
(86320498)

8:30 a.m.
Simple algebras, graphs, and projective planes.
Joseph Rotman*, University of Illinois, UrbanaChampaign
(86317522)

8:45 a.m.
Root multiplicities of the hyperbolic KacMoody algebra HA_1^(1).
SeokJin Kang*, North Carolina State University
(86317396)

9:00 a.m.
Results on subspace products in KacMoody algebras.
Phyllis E. Singer*, University of Missouri, Rolla
(86317387)

9:15 a.m.
Rank stability of weight multiplicities in classical affine Lie algebras.
Steven N. Kass*, Drew University
(86317329)

9:30 a.m.
On simple rings with commutators in the left nucleus.
Erwin Kleinfeld*, University of Iowa
Harry F. Smith, University of New England, Australia
(86317116)

9:45 a.m.
Cyclic cocycles on a dilation of a preFredholm module to a Fredholm module.
Jacek Brodzki*, University of Texas, Austin
(86318431)

Friday January 18, 1991, 7:00 a.m.9:55 a.m.
MAA Session on Alternatives to the Lecture Method, I

7:00 a.m.
Statistics, an alternative approach.
Gail Kaplan*, Washington College

7:20 a.m.
Using small group collaborative instruction: Some tips for getting started.
Julian Weissglass*, University of California, Santa Barbara

7:40 a.m.
The use of cooperative learning in upper division geometry.
Dorothy J. Williams*, Portland State University

8:00 a.m.
Alternative methods in teaching geometry.
Martha K. Smith*, University of Texas, Austin

8:20 a.m.
Writing and speaking to learn geometry.
Nadine Myers*, Hamline University

8:40 a.m.
Student writes to a student centered classroom.
Coreen Mett*, Radford University

9:00 a.m.
Small group discussions and manipulatives for college math classes.
Phyllis Chinn*, Humboldt State University

9:20 a.m.
Group problem solving in the calculus classroom.
Susann M. Mathews*, Miami University, Middletown

9:40 a.m.
Getting more from Moore.
G. Edgar Parker*, James Madison University

Friday January 18, 1991, 7:00 a.m.8:20 a.m.
MAA Session
Environmental modeling
Organizers:
Ben Fusaro, Salisbury State University
Speakers:
Roland H. Lamberson, Humboldt State University
Roy B. Leipnik, University of California, Santa Barbara
Robert W. McKelvey, University of Montana

Friday January 18, 1991, 7:00 a.m.9:55 a.m.
MAA Committee on Student Chapters Workshop: Part B
Chaos, fractals, and dynamics\endash Computer experiments in mathematics
Organizers:
Marilyn Durkin, Bentley College

Friday January 18, 1991, 7:00 a.m.8:20 a.m.
MAA Women and Mathematics Session
WAM: Yesterday, today and tomorrowIn commemoration of WAM's 15 years of service
Alice Kelly,

Friday January 18, 1991, 7:00 a.m.9:55 a.m.
NAM Contributed Paper Session
Presentations by recent doctoral recipients

Friday January 18, 1991, 7:05 a.m.9:40 a.m.
MAA Session on Statistics and Probability, I

7:05 a.m.
Using spreadsheets in teaching statistics.
Deane E. Arganbright*, Whitworth College

7:25 a.m.
Statistics in secondary schools: The quantitative literacy project.
Ann E. Watkins*, California State University, Northridge

7:45 a.m.
The role of the computer in teaching probability and statistics.
J. Laurie Snell*, Dartmouth College
William Peterson, Middlebury College

8:05 a.m.
Computer graphics and simulations in teaching statistics.
Henry Krieger, Harvey Mudd College
James PinterLucke*, ClaremontMcKenna College

8:25 a.m.
Getting more data into applied statistics courses.
Robin H. Lock*, St. Lawrence University

8:45 a.m.
Getting more data into theoretical statistics courses.
Thomas L. Moore*, Grinnell College

9:05 a.m.
An introductory statistics course: The nonparametric way.
Gottfried E. Noether*, University of Connecticut, Storrs

9:25 a.m.
Computer graphics simulations in statistics.
Florence S. Gordon, New York Institute of Technology
Sheldon P. Gordon*, Suffolk Community College

Friday January 18, 1991, 7:05 a.m.9:50 a.m.
MAA Session on Using History in the Teaching of Mathematics, I

7:05 a.m.
Great problems of mathematics: A course based on original sources.
Reinhard C. Laubenbacher*, New Mexico State University, Las Cruces
David J. Pengelley, New Mexico State University, Las Cruces

7:30 a.m.
History from three viewpoints.
Gary L. McGrath*, Pittsburg State University

7:45 a.m.
The history of mathematics and philosophy.
James W. Petticrew*, University of TexasPan American

8:00 a.m.
A writing intensive history of mathematics course.
John F. Berglund*, Virginia Commonwealth University

8:15 a.m.
History of mathematics: A timehopping, problemsolving approach with maple flavoring.
David Graves*, Elmira College

8:30 a.m.
A graduate course in the history of mathematics as the cornerstone of a teacher training program.
David Knee*, Hofstra University

8:45 a.m.
History of mathematics: A graduate survey course at Penn State.
John W. Dawson, Jr.*, Pennsylvania State University, York

9:00 a.m.
Hilbert's problems, and a play based on them.
Marjorie Senechal*, Smith College

9:25 a.m.
Using Hilbert's problems to teach history.
Sharon Kunoff*, Long Island University, C.W. Post Campus

9:40 a.m.
The problem of points as a case study in problem solving.
David E. Kullman*, Miami University, Oxford

Friday January 18, 1991, 8:00 a.m.8:50 a.m.
AMS Invited Address

Friday January 18, 1991, 8:30 a.m.9:55 a.m.
MAA Committee on the Undergraduate Program in Mathematics Panel Discussion
Undergraduate curriculum initiatives: From ideas to action
Lynn A. Steen,

Friday January 18, 1991, 8:30 a.m.9:55 a.m.
MAA CUPM Subcommittee on Undergraduate Research in Mathematics Panel Discussion
Models for undergraduate research
Lester J. Senechal,

Friday January 18, 1991, 9:05 a.m.9:55 a.m.
AMS Committee on Science Policy Government Speaker

Friday January 18, 1991, 10:10 a.m.11:00 a.m.
AMSMAA Invited Address
Characteristic forms.
Shiing S. Chern*, University of California, Berkeley

Friday January 18, 1991, 11:00 a.m.12:00 p.m.
National Science Foundation Informal Discussion Group on Research

Friday January 18, 1991, 12:00 p.m.1:00 p.m.
AMS Colloquium Lecture: Lecture III
Title to be announced.
Robert D. MacPherson*, Massachusetts Institute of Technology

Friday January 18, 1991, 12:00 p.m.3:20 p.m.
AMSMAA Special Session on Mathematics and Education Reform, III: Perspectives on the Roles of Research Mathematicians in Education Reform

12:00 p.m.
Introduction

12:15 p.m.
Some observations from 30 years experience in mathematics education.
Andrew Gleason*, Harvard University
(86398859)

12:35 p.m.
A program for high school teachers on mathematics and its applications.
Deborah Tepper Haimo*, University of Missouri, St.\ Louis
(86398290)

12:55 p.m.
Understanding misunderstandings in mathematics.
Leon Henkin*, University of California, Berkeley
(86398508)

1:15 p.m.
Educational reform and the professional societies.
William Jaco*, American Mathematical Society, Providence, Rhode Island
(86398870)

1:35 p.m.
Mathematical education from Kindgergarten through the University.
William P. Thurston*, Princeton University
(86398690)

1:55 p.m.
Education and the research community.
Michael Reed*, Duke University
(86398554)

2:05 p.m.
National goals and agenda
Ray C. Shiflett*, Mathematical Sciences Education Board, Washington, DC
(86398774)

2:15 p.m.
Fostering the involvment of researchers in educationoriented programs.
Judith S. Sunley*, National Science Foundation
(86398839)

2:25 p.m.
Symposium on perspective on the roles of research mathmaticians and education reform.
Marcia P. Sward*, The Mathematical Association of America
(86398798)

2:35 p.m.
Faculty roles in recruiting mathematics majors.
Uri Treisman*, Swarthmore College
(86398555)

2:45 p.m.
Discussion

Friday January 18, 1991, 12:00 p.m.3:20 p.m.
AMSMAA Special Session on Research Papers by Undergraduates, I

12:00 p.m.
Bootstrapping in principal component analysis.
Laura K. Gross*, Yale University
Vivek K. Goyal, State University of Iowa
Marcel R. Grenier, Eastern Connecticut State University
S. Jane Henley, Mount Holyoke College
Janice Gifford, Mount Holyoke College
(86362694)

12:30 p.m.
Exceptional lines and curvature of algebraic surfaces in C^3.
Chrissie Beaber, Mount Holyoke College
Eileen Cheng, Mount Holyoke College
Brendan Hassett*, Yale University
Gwen Lloyd, Bryn Mawr College
Donal O'Shea, Mount Holyoke College
Rebecca Runnels, College of the Holy Cross
(86314692)

1:00 p.m.
Some facts about CWATsets.
Martin Wattenberg*, Brown University
(86320693)

1:30 p.m.
Splitting of the characteristic polynomial of certain structured matrices, and information requirements for the determination of the inverse of an n x n persymmetric matrix.
Samuel Ferguson*, Brigham Young University
Charles R. Johnson, College of William and Mary
Tamir Shalom, Columbia University
(86315361)

2:00 p.m.
Reliability of consecutive systems.
Hope McIlwain*, Furman University
Douglas Shier, College of William and Mary
(86305838)

2:30 p.m.
Pebbling graphs.
David Moews*, University of California, Berkeley
(86305432)

3:00 p.m.
Existence, uniqueness and connectivity of sets generated by finite and infinite iterated function systems.
Stephanie Wukovitz*, Pennsylvania State University, University Park
(86358771)

Friday January 18, 1991, 12:00 p.m.3:20 p.m.
AMS Special Session on Computing Optimal Geometries, III

12:00 p.m.
The opaque cube problem.
Kenneth Brakke*, Susquehanna University
(86349129)

12:30 p.m.
Threedimensional fluid interfaces in a cylindrical container.
James Tegart*, Martin Marietta Astronautics, Denver, Colorado
(86376236)

1:00 p.m.
Energy minimizing capillary surfaces for exotic containers.
Michael Callahan, Harvard University
Paul Concus*, Lawrence Berkeley Laboratory and University of California, Berkeley
Robert Finn, Stanford University
(86368203)

1:30 p.m.
Computing minimal surfaces with and without conformal representation.
David Hoffman*, University of Massachusetts, Amherst
(86353437)

2:00 p.m.
New methods for existence of minimal hypersurfaces.
Jon T. Pitts*, Texas A\thsp\&\thsp M University, College Station
(86349331)

2:30 p.m.
Numerical approximation of areaminimizing hypersurfaces.
Harold R. Parks*, Oregon State University
(86368299)

3:00 p.m.
Crystalline approximation: Computing minimum surfaces with maximum flows.
John M. Sullivan*, Minneapolis, Minnesota
(86351314)

Friday January 18, 1991, 12:00 p.m.3:20 p.m.
AMS Special Session on Geometric Fourier Analysis, I

12:00 p.m.
Comparison theorems for P.D.E.'s on tori.
Albert Baernstein, II*, Washington University
(86335144)

12:30 p.m.
Weakly elliptic systems with obstacle constraints.
David R. Adams*, University of Kentucky
(86335112)

1:00 p.m.
Conformally invariant inequalities and conformally covariant differential operators.
Thomas P. Branson*, University of Iowa
(86353363)

1:30 p.m.
Sobolev inequality of MoserTrudinger type.
SunYung Alice Chang*, University of California, Los Angeles
(86342170)

2:00 p.m.
Kparameter Fourier analysis.
Elias M. Stein*, Princeton University
(86342641)

2:30 p.m.
Sharp constants for the Fourier transform and other Gaussian kernels.
Elliott H. Lieb*, Princeton University
(86342146)

3:00 p.m.
Sobolev inequalities and conformal geometry.
Jose F. Escobar*, Indiana University, Bloomington
(86353628)

Friday January 18, 1991, 12:00 p.m.3:20 p.m.
AMS Special Session on Nonlinear Control Theory and Related Topics, I

12:00 p.m.
Stabilization and control of nonlinear systems with constraints.
Anthony M. Bloch*, Ohio State University, Columbus
(86393364)

12:30 p.m.
Inputoutput differential equations and realizations of nonlinear control systems.
Peter Crouch*, Arizona State University
Francoise LamnabhiLagarrigue, CNRS Laboratoire, GifsurYvette, France
(86393513)

1:00 p.m.
Controllability of the holonomy of a system of two symmetric rigid bodies in 3space.
Michael J. Enos*, Saint Lawrence University
(8634994)

1:30 p.m.
Motion planning and nilpotent Lie algebras of vector fields.
Gerardo Lafferriere*, Portland State University
Hector Sussmann, Rutgers University, New Brunswick
(86393266)

2:00 p.m.
A dynamical systems approach to control.
Wolfgang Kliemann*, Iowa State University
(86393264)

2:30 p.m.
Asymptotic feedback stabilization.
Matthias Kawski*, Arizona State University
(86393633)

3:00 p.m.
Smalltime local controllability and normal selfreachability.
Kevin A. Grasse*, University of Oklahoma
(86393267)

Friday January 18, 1991, 12:00 p.m.3:20 p.m.
AMS Special Session on Analytical Methods in Convexity, I

12:00 p.m.
Asymptotic Banach  Mazur approximation of convex bodies.
Peter M. Gruber*, Vienna Technical University, Austria
(86352152)

12:30 p.m.
Probability and convexity.
R. A. Vitale*, University of Connecticut, Storrs
(86352786)

1:00 p.m.
Relatives of the Petty projection in equality.
Erwin Lutwak*, Polytechnic University of New York
(86352549)

1:30 p.m.
Polarity for nonconvex surfaces and generalized envelopes.
Vladimir Oliker*, Emory University
(86352115)

2:00 p.m.
Constant width in Riemannian spaces.
Boris V. Dekster*, Mount Allison University
(8635265)

2:30 p.m.
Three (probably) identical classes of convex bodies.
G. T. Sallee*, University of California, Davis
(86352760)

3:00 p.m.
On the number of antipodal and strictly antipodal point pairs in finite subsets of R^d.
Horst Martini*, Mathematics Institute, German Democratic Republic
E. Makai, Budapest, Hungary
(86352858)

Friday January 18, 1991, 12:00 p.m.2:20 p.m.
AMS Special Session on Matrix Searching, Monge Arrays and Ackemann's Inverse: Algorithms and Lower Bounds, I

12:00 p.m.
Applications of array searching to economic lotsized models.
Alok Aggarwal*, IBM Research Division, Yorktown Heights, New York
(86368809)

12:30 p.m.
Compact storage of nonadaptive routing tables.
Baruch Schieber*, IBM T. J. Watson Research Center, Yorktown Heights, New York
(86368808)

1:00 p.m.
Two algorithms for selecting the kth smallest entry in each row of a Monge array.
James Park*, Massachusetts Institute of Technology
(86368807)

1:30 p.m.
Seriesparallel graphs, Monge arrays and greedy linear.
Alan Hoffman*, IBM T. J. Watson Research Center, Yorktown Heights, New York
(86368806)

2:00 p.m.
Staircase transportation problems with superadditive rewards and cumulative capacities.
Arthur F. Veinott, Jr.*, IBM Almaden Research Center, San Jose, California and Stanford University
(86368805)

Friday January 18, 1991, 12:00 p.m.1:50 p.m.
AMS Special Session on Hopf Algebras, IV

12:00 p.m.
Some remarks on duality.
Robert J. Blattner*, University of California, Los Angeles
(86316651)

12:30 p.m.
Hopf algebras applied to representation theory.
Davida Fischman*, Weizmann Institute of Science, Israel
(8631661)

1:00 p.m.
A Connes spectrum for Hopf algebras.
James Osterburg*, University of Cincinnati
D. S. Passman, University of Wisconsin, Madison
Declan Quinn, Syracuse University
(8631616)

1:30 p.m.
Hopf algebras and categories.
K.H. Ulbrich*, Universit\'e of ParisNord, France
(86316862)

Friday January 18, 1991, 12:00 p.m.3:20 p.m.
AMS Special Session on Arithmetical Algebraic Geometry, III

12:00 p.m.
Solutions to certain families of Thue forms.
P. Emery Thomas*, University of California, Berkeley
(86311163)

12:30 p.m.
An explicit proof of BrumerStark over F_q(T).
Greg Anderson*, California Institute of Technology
(86311237)

1:00 p.m.
Harmonic analysis and the flow of a Drinfeld module.
David Goss*, Ohio State University, Columbus
(86312120)

1:30 p.m.
Modular symbols for function fields.
Jeremy Teitelbaum*, University of Illinois, Chicago
(86311192)

2:00 p.m.
The arithmetic of the Jacobian of a Fermat curve.
William G. McCallum*, University of Arizona
(86311744)

2:30 p.m.
Heights of projective varieties and an arithmetic Bezout theorem.
Henri Gillet*, University of Illinois at Chicago
(86314171)

3:00 p.m.
The ThueSiegelDysonGel'fondRothWirsing and MordellFaltings theorems, both under the same roof.
Paul Vojta*, University of California, Berkeley
(86314134)

Friday January 18, 1991, 12:00 p.m.3:10 p.m.
AMS Session on Combinatorics, III

12:00 p.m.
Tcolorings of graphs.
Daphne D.F. Liu*, University of South Carolina, Columbia
(86305639)

12:15 p.m.
Determinants among the binomial and trinomial coefficients.
Jerrold R. Griggs, University of South Carolina, Columbia
Christine H. W. Sun*, University of South Carolina, Columbia
(86305640)

12:30 p.m.
Harmonic invariants of graphs.
Jerzy Kocik*, Southern Illinois University, Carbondale
(86305658)

12:45 p.m.
Classifying the onefactorizations of a tensor product graph.
John C. George*, University of Illinois, UrbanaChampaign
(86305663)

1:00 p.m.
The multicolored matrixtree theorem.
Allen J. Schwenk*, Western Michigan University
(86305677)

1:15 p.m.
Edgedisjoint Hamilton cycles in regular line graphs.
Siming Zhan*, Simon Fraser University
(86305687)

1:30 p.m.
The dimension of the set of multinomial coefficients not divisible by n.
John Holte*, Gustavus Adolphus College
(86305726)

1:45 p.m.
Almostouterplanar graphs.
Lawrence Wargo*, Louisiana State University, Baton Rouge
(86305728)

2:00 p.m.
Neighborhood sets in graphs.
S. R. Jayaram, JNN College of Engineering, India
Y. H. Harris Kwong, State University of New York, College at Fredonia
Joseph Straight*, State University of New York, College at Fredonia
(86305755)

2:15 p.m.
Congruence problems involving Stirling numbers of the first kind.
Rhodes Peele*, Auburn University, Montgomery
Herbert Wilf, University of Pennsylvania
(86305811)

2:30 p.m.
Degree sums, neighborhood unions and matching extension in graphs.
M. D. Plummer*, Vanderbilt University
(86305830)

2:45 p.m.
The threshold weight of a graph.
Chi Wang*, Rutgers University, New Brunswick
A. C. Williams, Rutgers University, New Brunswick
(86305869)

3:00 p.m.
The complexity of graphs Hamiltonianconnected from a vertex.
Alice M. Dean*, Skidmore College
(86305285)

Friday January 18, 1991, 12:00 p.m.3:10 p.m.
AMS Session on Complex Analysis, II

12:00 p.m.
Quasiregular mappings and Royden algebras.
Nathan R. Soderborg*, University of Michigan, Ann Arbor
(86330303)

12:15 p.m.
Quasiextremal distance domains.
Shanshuang Yang*, University of Michigan, Ann Arbor
(86330304)

12:30 p.m.
On the coefficient problem for the Schwarzian derivative.
Stephen M. Zemyan*, Pennsylvania State University, Mont Alto Campus
(86330390)

12:45 p.m.
On Korenblum's maximum principle for the Bergman space.
Kendall Richards*, Texas Tech University
(86330469)

1:00 p.m.
Twist points of a simply connected domain.
John Marafino*, James Madison University
(86330519)

1:15 p.m.
The norm of p'(z) in terms of the norm of p(z).
Robert Gardner*, Auburn University, Auburn
(86330529)

1:30 p.m.
Projective structure of Fuchsian groups.
Jharna Sengupta*, Elizabeth City State University
(86330567)

1:45 p.m.
The order of a function and the twin prime conjecture.
Badih Ghusayni*, North Central College
(86330573)

2:00 p.m.
On a subclass of uniformly starlike functions.
Mohammad Salmassi*, College of the Holy Cross
Ed Merkes, University of Cincinnati
(86330576)

2:15 p.m.
Angular limits and infinite asymptotic values of analytic functions of slow growth.
Robert Berman*, Wayne State University
(86330714)

2:30 p.m.
HardyLittlewood theorems for elliptic equations in divergence form.
Craig A. Nolder*, Florida State University
(86330735)

2:45 p.m.
Univalent functions with range of prescribed transfinite diameter.
Robin Cunningham*, University of Michigan, Ann Arbor
(86330787)

3:00 p.m.
Behavior of quasiconformal mappings at a point.
Melkana Brakalova*, Washington University
(86330790)

Friday January 18, 1991, 12:00 p.m.2:55 p.m.
AMS Session on Ordinary Differential Equations, II

12:00 p.m.
Stability of recede trajectories of dynamical systems.
Zhivko S. Athanassov*, Bulgarian Academy of Sciences, Bulgaria
(86334876)

12:15 p.m.
Disconjugacy of a selfadjoint difference equation.
Allan Peterson*, University of Nebraska, Lincoln
(86334486)

12:30 p.m.
Steadystate diffussion in a two patch nonhomogeneous environment.
J. B. Garner*, Mississippi State University
R. Shivaji, Mississippi State University
(86334480)

12:45 p.m.
Spectral analysis of second order difference equations.
Dale T. Smith*, University of North Texas
(86334476)

1:00 p.m.
Existence of solutions to first order ordinary differential equations.
Zachariah Sinkala*, Middle Tennessee State University
(86334459)

1:15 p.m.
Universality of the fine structures of onedimensional unimodal maps in the chaotic regime.
Yuzhen Ge*, Virginia Polytechnic Institute and State University
(86334427)

1:30 p.m.
Boundedness properties and perturbing Lyapunov functions.
Semen Koksal*, Florida Institute of Technology
(86334421)

1:45 p.m.
Nonlinear optimization theory with multiple objectives and dynamical systems.
John Jones, Jr.*, Air Force Institute of Technology
(86334342)

2:00 p.m.
Variation of constants formula for abstract Volterra functional differential equations.
C. Corduneanu*, University of Texas, Arlington
(86334274)

2:15 p.m.
Global behavior of solutions of a certain nth order differential equation.
T. K. Puttaswamy*, Ball State University
(86334253)

2:30 p.m.
Uniqueness of positive solutions for a semipositone problem with concave nonlinearity.
Alfonso Castro, University of North Texas
R. Shivaji*, Mississippi State University
(86335479)

2:45 p.m.
Bloch functions of several complex variables.
Xiangyang Liu*, University of Cincinnati
(8633277)

Friday January 18, 1991, 12:00 p.m.3:10 p.m.
AMS Session on Group Theory

12:00 p.m.
Groups with relatively few centralizers.
Sarah Marie Belcastro*, Haverford College
(86320655)

12:15 p.m.
Closure operations and locally constructed formations.
Mark C. Hofmann*, Skidmore College
(86320609)

12:30 p.m.
Computer examples in modular group rings.
D. B. Coleman*, University of Kentucky
(86320172)

12:45 p.m.
Recent results on the normal embedding problem.
Francis J. Flanigan*, San Jose State University
Brian L. Peterson, San Jose State University
(86320141)

1:00 p.m.
Categoricallycompact groups.
Temple H. Fay, University of Southern Mississippi
Gary L. Walls*, University of Southern Mississippi
(86320188)

1:15 p.m.
On the DenesHermann theorem: A different approach.
Peter Yff*, Ball State University
(86320256)

1:30 p.m.
Closure properties in virtually freebycyclic groups.
Sharon E. Persinger*, State University of New York, College at New Paltz
(86320306)

1:45 p.m.
An E^2 standard for computability in groups.
R. W. Gatterdam*, University of Alaska, Fairbanks
(86320423)

2:00 p.m.
Multiplicityfree permutation representations of the alternating groups.
Jose Maria P. Balmaceda*, University of Illinois, UrbanaChampaign
(86320454)

2:15 p.m.
On the structure of the representation ring of finite classical groups.
Essam A. Abotteen*, Emporia State University
(86320455)

2:30 p.m.
Some problems appearing in the theory of kcharacters of groups.
Kenneth W. Johnson*, Pennsylvania State University, Ogontz Campus
(86320463)

2:45 p.m.
The generation of hyperbolic unitary groups using the unitary analogue of GE_n(R).
Allen Hibbard*, Central College
(86320466)

3:00 p.m.
Autoprojectivities of finite doublygenerated Abelian pgroups.
Charles Holmes*, Miami University, Oxford
(86320730)

Friday January 18, 1991, 12:00 p.m.3:10 p.m.
AMS Session on Operator Theory and Analysis

12:00 p.m.
Seminormal composition operators.
James T. Campbell*, Memphis State University
William E. Hornor, University of Southern Mississippi
(86347673)

12:15 p.m.
The iterative solution of the equation f member x + T x for an accretive operator T in uniformly smooth Banach spaces.
Xinlong Weng*, Marshall University
(86347684)

12:30 p.m.
Toeplitz operators with pc symbols in weighted spaces.
Ilya M. Spitkovskii*, College of William and Mary
(86347727)

12:45 p.m.
An interpolation inequality arising in degenerate elliptic problems.
Gisele Ruiz Rieder*, Louisiana State University, Baton Rouge
J. R. Dorroh, Louisiana State University, Baton Rouge
Jerome A. Goldstein, Tulane University
(86347851)

1:00 p.m.
Representation of sum form information measures with additivity of type (alpha, beta) on open domain.
PL. Kannappan*, University of Waterloo
P. K. Sahoo, University of Louisville
(86339273)

1:15 p.m.
Parseval type theorems on Hankel transforms and their applications.
Osman Yurekli*, Ithaca College
(86344319)

1:30 p.m.
Numerical inversion of two dimensional Laplace transforms using Fourier series representations.
M. Vinayagamoorthy*, Arkansas College
(86344485)

1:45 p.m.
Error estimates and stability of Itotype systems of nonlinear stochastic integrodifferential equations.
G. S. Ladde, University of Texas, Arlington
S. Sathananthan*, Jarvis Christian College
(86345403)

2:00 p.m.
Coupled elastic and viscoelastic rods.
Wolfgang Desch, Graz University, Austria
Ronald Grimmer*, Southern Illinois University, Carbondale
(86345422)

2:15 p.m.
Constructing the Neumann series  an example.
David S. Tselnik*, North Dakota State University, Fargo
(86345871)

2:30 p.m.
Entropy of groups and subfactors.
Dietmar Bisch*, University of California, Los Angeles
(86346317)

2:45 p.m.
Central sequences of matrix units of simple C*algebras.
Bruce E. Blackadar*, University of Nevada, Reno
(86346784)

Friday January 18, 1991, 12:00 p.m.3:30 p.m.
MAA Session on Alternatives to the Lecture Method, II

12:00 p.m.
The research apprenticeship alternative to lecturing.
Kirk A. Mathews*, Air Force Institute of Technology

12:20 p.m.
Collaborative learning in calculus I.
Nancy L. Hagelgans*, Ursinus College

12:40 p.m.
A longterm exploratory project.
Richard Barshinger*, Pennsylvania State University, Dunmore

1:00 p.m.
Teachatopic.
Joanne Kossegi*, State University of New York, College at Oswego
Margaret W. Groman, State University of New York, College at Oswego

1:20 p.m.
Large calculus classes run as workshops.
Al Shenk*, University of California at San Diego, La Jolla

1:40 p.m.
Reinventing the calculus: A group experience.
Michael J. Miller*, LeMoyne College

2:00 p.m.
Engaging in mathematics.
Michael D. Taylor*, University of Central Florida

2:20 p.m.
Teamwork in undergraduate mathematics classes.
William Marion*, Valparaiso University

2:40 p.m.
A studentcentered approach to teaching college algebra.
Philip A. DeMarois*, William Rainey Harper College

3:00 p.m.
Studentcentered instruction at the college level.
Mark Eastman*,

3:20 p.m.
The art of biting your tongue.
William Miller*, LeMoyne College

Friday January 18, 1991, 12:00 p.m.3:20 p.m.
MAA CRAFTY Poster Session
Thomas W. Tucker,

Friday January 18, 1991, 12:00 p.m.1:30 p.m.
MAANAM Panel Discussion
Nurturing minority graduate students in mathematics
Organizers:
Sylvia Bozeman,

Friday January 18, 1991, 12:05 p.m.2:55 p.m.
MAA Session on Statistics and Probability, II

12:05 p.m.
Calculator enhanced probability and statistics.
Iris B. Fetta*, Clemson University

12:25 p.m.
The computer as a tool for helping to solve problems.
Elliot A. Tanis*, Hope College

12:45 p.m.
Freeing statistics courses from prerequisites: The Mount Holyoke model.
Marsha J. Davis*, Mount Holyoke College

1:00 p.m.
Using a MINITABbased lab.
Robert L. Brandon*, Eastern Oregon State College

1:15 p.m.
Statistics in a community college.
Emeric Hornick*, College of the Redwoods

1:30 p.m.
Statistics can make mathematics come alive for the liberal arts student.
Sherralyn D. Craven*, Central Missouri State University

1:45 p.m.
Defensive statistics.
Barry Brunson*, Western Kentucky University

2:00 p.m.
Liberal arts math with probability.
Kay Gura*, Ramapo College of New Jersey

2:15 p.m.
Quantative reasoning skills for liberal arts students.
Mark Bottorff*, Dickenson College
Walter Chromiak, Dickinson College
Jim Hoefler, Dickinson College
Sinan Koont, Dickinson College
Allan Rossman, Dickinson College
J. A. Skelton, Dickinson College

2:30 p.m.
Two combinatorial identities derived from the recurrence relation (n r)=(n1 r1)+(n1 r).
Diane M. Spresser*, James Madison University
Jeffrey S. Fritz, James Madison University

2:45 p.m.
The current status of the scientific calculator in computing summary statistics among grade school, high school, and college students.
John L. Stedl*, Chicago State University

Friday January 18, 1991, 12:30 p.m.1:30 p.m.
MAA Student Presentations
Mathematical contest in modeling
Organizers:
Ben Fusaro, Salisbury State University

Friday January 18, 1991, 1:15 p.m.2:05 p.m.
MAA Invited Address
Algebraic curves and error correcting codes from a modern point of view.
Carlos Moreno*, Bernard M. Baruch College, City University of New York

Friday January 18, 1991, 1:15 p.m.3:15 p.m.
MAA Minicourse \#11: Part A
A survey of educational software
Organizers:
Virginia Knight, Meredith College
Vivian Kraines, Meredith College

Friday January 18, 1991, 1:15 p.m.3:15 p.m.
MAA Minicourse \#13: Part A
Great theorems from mathematical analysis: 16891881
Organizers:
William Dunham, Hanover College

Friday January 18, 1991, 1:15 p.m.3:15 p.m.
MAA Minicourse \#17: Part A
Instituting a mathematics placement program: Creating order out of chaos in freshman mathematics
Organizers:
Mary McCammon, Pennsylvania State University

Friday January 18, 1991, 1:15 p.m.3:10 p.m.
Rocky Mountain Mathematics Consortium Board of Directors' Meeting

Friday January 18, 1991, 1:20 p.m.3:20 p.m.
AMS Special Session on Turbulence, Mathematical Aspects, I

1:20 p.m.
Turbulent relaxation in electrostatic, magnetohydrodynamic, and gravitational systems.
David Montgomery*, Dartmouth College
(8637033)

2:00 p.m.
Informal Discussion

2:20 p.m.
Merger and reconnection: Generic processes in two and threedimensional incompressible turbulence.
Norman J. Zabusky*, Rutgers University, Piscataway
(86376539)

3:00 p.m.
Informal Discussion

Friday January 18, 1991, 2:20 p.m.3:15 p.m.
MAA CUPM Subcommittee on Quantitative Literacy Debate
Resolved\endash All college graduates should know college algebra

Friday January 18, 1991, 3:35 p.m.4:40 p.m.
MAA Business Meeting

Friday January 18, 1991, 5:00 p.m.7:00 p.m.
Association of Research Libraries Session
Delivering information to researchers: Opportunities and impediments
Organizers:
Ann Okerson, Association of Research Libraries

Friday January 18, 1991, 5:00 p.m.6:00 p.m.
Board on Mathematical Sciences Session
Using the DAVID II Report
Organizers:
Lawrence H. Cox, Director, Board on Mathematical Sciences

Friday January 18, 1991, 6:00 p.m.8:00 p.m.
MAA Minicourse \#10: Part B
Chaotic dynamical systems
Organizers:
Robert L. Devaney, Boston University

Friday January 18, 1991, 6:00 p.m.8:00 p.m.
MAA Minicourse \#14: Part A
Actuarial mathematics
Organizers:
Jonathan Kane, University of Wisconsin, Whitewater

Friday January 18, 1991, 6:00 p.m.8:00 p.m.
MAA Minicourse \#15: Part A
Learning abstract algebra by programming in ISETL
Organizers:
Ed Dubinsky, Purdue University
Uri Leron, Technion\endash IIT

Friday January 18, 1991, 6:00 p.m.7:55 p.m.
AMS Session on Semigroups

6:00 p.m.
On embedding quasipregroups.
Seymour Lipschutz*, Temple University, Philadelphia
(8632003)

6:15 p.m.
Retracts and semiretracts of free monoids.
James Anderson*, University of South Carolina, Spartanburg
Wit Fory\'s, Jagiellonian University, Poland
Tom Head, State University of New York, Binghamton
(86320323)

6:30 p.m.
Commutative semigroup cohomology.
P. A. Grillet*, Tulane University
(86320343)

6:45 p.m.
Archimedean components of P(Z).
Reuben Spake, College of Charleston
Bryce Hanlon*, College of Charleston
(86320347)

7:00 p.m.
Preaffine semigroups and convex matrix semigroups.
Donald D. Weddington*, San Jose State University
Jane M. Day, San Jose State University
(86320389)

7:15 p.m.
Right orders in semisimple semigroups.
Eric E. Lund*, Bemidji State University
(86320488)

7:30 p.m.
Free products of inverse monoids with amalgamation.
Steven Haataja*, University of Nebraska, Lincoln
(86320607)

7:45 p.m.
On the lattice of right congruences of a semigroup.
Eun Ho Lee*, University of Iowa
(86320619)

Friday January 18, 1991, 6:00 p.m.8:40 p.m.
AMS Session on Topology, I

6:00 p.m.
Symmetry conditions in terms of open sets.
P. Fletcher, Virginia Polytechnic Institute and State University
W. Hunsaker*, Southern Illinois University, Carbondale
(8635401)

6:15 p.m.
Entourage uniformities for locales.
P. Fletcher*, Virginia Polytechnic Institute and State University
W. Hunsaker, Southern Illinois University, Carbondale
(8635402)

6:30 p.m.
Finite uniform equidistant sets in plane continua.
S. M. Loveland*, Eastern Oregon State College
L. D. Loveland, Utah State University
(86354139)

6:45 p.m.
Suitable spaces and Newman's property.
L. F. McAuley, State University of New York, Binghamton
R. A. Johnson*, Indiana State University
(86354160)

7:00 p.m.
Space filling maps and dimension.
Matthew Brahm*, University of Texas, Austin
(86354181)

7:15 p.m.
An ordertheoretic characterization of Peano continua.
Sarah Holte*, University of Missouri, Rolla
(86354213)

7:30 p.m.
Ultrafilters and topological entropy of a complementary topology.
Rahim G. Karimpour*, Southern Illinois University, Edwardsville
(86354258)

7:45 p.m.
Generating topologies with cozero sets of functions.
Alan Dow, York University
M. Henriksen, Harvey Mudd College
R. D. Kopperman*, City College, City University of New York
R. G. Woods, University of Manitoba
(86354263)

8:00 p.m.
Regularity and extension of functions.
Roman Fri\v c, Washington State University
Darrell Kent*, Washington State University
(86354297)

8:15 p.m.
A strongly hereditarily separable, nonmetrisable manifold.
David Gauld*, University of Auckland, New Zealand
(86354322)

8:30 p.m.
Images of arcs and inverse limits.
J. Nikiel, University of Saskatchewan
H. M. Tuncali*, University of Saskatchewan,
E. D. Tymchatyn, University of Saskatchewan,
(86354356)

Friday January 18, 1991, 6:00 p.m.8:25 p.m.
AMS Session on Global Analysis

6:00 p.m.
Isolated periodic solutions and analysis of degenerate Hopf bifurcation with modal parameter in the HodginHuxley model.
LieJune Shiau*, University of Houston, Clear Lake
D. Hassard, State University of New York, College at Buffalo
(86358638)

6:15 p.m.
Singular set of heatflow problem for harmonic maps.
Xiaoxi Cheng*, Rice University
(86358647)

6:30 p.m.
On the accumulation of singular points in a bifurcation problem associated with a nonlinear ordinary differential equation.
Klaus Hackl*, University of Delaware
(86358700)

6:45 p.m.
An inverse function theorem with application to dynamical systems.
Patrick D. McSwiggen*, University of Cincinnati
(86358708)

7:00 p.m.
Intersections of thick Cantor sets.
Roger Kraft*, University of Cincinnati
(86358709)

7:15 p.m.
Axially symmetric harmonic maps minimizing a relaxed energy.
Robert Hardt, Rice University
Fanghua Lin, Courant Institute of Mathematical Sciences, New York University
Chi Cheung Poon*, Rice University
(86358764)

7:30 p.m.
Degenerate Hopf bifurcation and isolas of periodic solutions of an enzymecatalyzed model.
Brian D. Hassard*, State University of New York, Buffalo
Katie HQ Jiang, General Motors Institute, Flint, Michigan
(86358822)

7:45 p.m.
On bifurcation via lattice theory.
Liang Chen*, Memphis State University
(86358828)

8:00 p.m.
Subdiagonal algebras of AFalgebras.
Yiu Tung Poon*, Iowa State University
Zhongjin Ruan, University of Illinois, UrbanaChampaign
(8634687)

8:15 p.m.
Periodic points on nilmanifolds and solvmanifolds.
Edward C. Keppelmann*, University of Wisconsin, Madison
(86355375)

Friday January 18, 1991, 6:00 p.m.8:10 p.m.
AMS Session on Probability and Statistics

6:00 p.m.
Sample pathvalued conditional YehWiener integrals and a Wiener integral equation.
Chull Park, Miami University, Oxford
David Skoug*, University of Nebraska, Lincoln
(8636076)

6:15 p.m.
On characterizations of Cauchy, normal and uniform distributions.
G. G. Hamedani*, Marquette University
(8636093)

6:30 p.m.
Pathwise exponential stability of stochastic differential equaitons.
JingLin Jiang*, Wayne State University
(86360865)

6:45 p.m.
A Bayesian approach to testing the equality of means when the sample sizes are random.
Mehdi Razzaghi*, Bloomsburg University of Pennsylvania
(86362215)

7:00 p.m.
On rate of convergence of efficient detection criteria in signal processing when the noise covariance matrix is arbitrary.
K. W. Tam*, Portland State University
Yuehua Wu, York University
(86362239)

7:15 p.m.
Modified moment estimation of the parameters of a fourparameter generalized Weibull distribution.
Manmohan S. Arora*, University of Bahrain, Bahrain
(8636245)

7:30 p.m.
Confidence intervals for quantile intervals of finite populations under stratification.
John S. Meyer*, Muhlenberg College
(86362452)

7:45 p.m.
A random numerical method with application in ignition of bunsen burner.
Yu Song*, Tulane University
(8636509)

8:00 p.m.
Nonsmoothness of solutions of Volterra equations with Abeltype kernels.
Javad Abdalkhani*, Ohio State University, Lima
(86365199)

Friday January 18, 1991, 6:00 p.m.8:25 p.m.
AMS Session on Numerical Analysis and Systems

6:00 p.m.
An alternative to the Hilbert Bramble lemma.
Al Shenk*, University of California at San Diego, La Jolla
(86365793)

6:15 p.m.
Discontinuous inverse SturmLiouville problems with symmetric potentials.
Mei Kobayashi*, IBM Japan Limited, Japan
(8636597)

6:30 p.m.
Effectiveness of Galerkin type approximation in finite dimensional compensator design.
M. NouriMoghadam, Pennsylvania State University, Lehman
S. Zhu*, Pennsylvania State University, Lehman
(86393308)

6:45 p.m.
Finite dimensional approximation in gap topology and its application in control design.
M. NouriMoghadam*, Pennsylvania State University, Lehman
S. Zhu, Pennsylvania State University, Lehman
(86393309)

7:00 p.m.
Analysis of linear distributed systems via Fournier series operational matrix.
Mohsen Razzaghi*, Mississippi State University
(86393357)

7:15 p.m.
Application of H_infinity optimization theory to nonlinear distortion reduction.
A. J. Tamraz, Wichita State University
M. E. Sawan*, Wichita State University
(86393534)

7:30 p.m.
Stabilization of hybrid systems in the presence of feedback delays.
Gregg Turner*, Pomona College
(86393575)

7:45 p.m.
On nearoptimum largescale stochastic control systems.
G. S. Ladde, University of Texas, Arlington
O. Sirisaengtaksin*, University of HoustonDowntown
(86393792)

8:00 p.m.
Polynomial control for time delay system.
Ali Ansari*, Pennsylvania State University, Lehman
(86393842)

8:15 p.m.
Numerical range preservingoperators on Banach algebras.
A. K. Gaur*, Duquesne University
(86346560)

Friday January 18, 1991, 6:00 p.m.8:10 p.m.
AMS Session on Education

6:00 p.m.
Introducing a computer lab into the calculus sequence, I.
Arthur G. Sparks*, Georgia Southern University
John W. Davenport, Georgia Southern University
(86398723)

6:15 p.m.
Introducing a computer lab into the calculus sequence,II.
John W. Davenport*, Georgia Southern University
James P. Braselton, Georgia Southern University
(86398722)

6:30 p.m.
Volume and surface area in lakes.
Dan Cass, Saint John Fisher College
Gerald Wildenberg*, Saint John Fisher College
(86398612)

6:45 p.m.
Calculus workshop for everyone.
Thomas M. Zachariah*, Loyola Marymount University
(86398606)

7:00 p.m.
An experiment in teaching prospective elementary teachers.
Thomas W. Hungerford*, Cleveland State University
(86398177)

7:15 p.m.
Intangibles and the importance of model theory in the teaching of functional analysis.
Eric Schechter*, Vanderbilt University
(86398131)

7:30 p.m.
Nonstandard solutions to standard problems.
Joe Thrash*, University of Southern Mississippi
(86397718)

7:45 p.m.
A new approach to nonlinear topics in algebra.
Bella Wiener*, University of TexasPan American
(86397610)

8:00 p.m.
An alternative proof for the mean value theorem.
Morteza ShafiiMousavi*, Indiana University, South Bend
(86397360)

Friday January 18, 1991, 6:00 p.m.7:30 p.m.
MAA Committee on Participation of Women in Mathematics Special Presentation
Changing the climate\endash Skits and discussion
Organizers:
Patricia Kenschaft, Montclair State College

Friday January 18, 1991, 6:30 p.m.7:30 p.m.
MAA Special Lecture

6:30 p.m.
Desirable scientific habits of mind learned from George Polya.
Lester H. Lange*, San Jose State University and Moss Landing Marine Laboratories, Moss Landing, California

Friday January 18, 1991, 7:00 p.m.8:50 p.m.
AMS Special Session on Automatic Theorem Proving, I

7:00 p.m.
Some adventures with automatic theorem proving.
Woodrow W. Bledsoe*, University of Texas, Austin
(86368433)

7:30 p.m.
A theorem prover for a computational logic.
Robert S. Boyer*, University of Texas, Austin
J. Strother Moore, Computational Logic, Inc. Austin, Texas
(86303380)

8:00 p.m.
Mechanical geometry theorem proving using algebraic methods.
ShangChing Chou*, University of Texas, Austin
(86368376)

8:30 p.m.
Is automated theorem proving for you?
Ewing Lusk*, Argonne National Laboratory, Argonne, Illinois
(86368334)

Friday January 18, 1991, 7:00 p.m.8:30 p.m.
MAA National Center for the Teaching of Undergraduate Mathematics Open Discussion
What is it and what should it be?
Moderators:
Robert Bumcrot, Hofstra University
Saturday January 19, 1991

Saturday January 19, 1991, 7:00 a.m.9:50 a.m.
AMSMAA Special Session on Research in Undergraduate Mathematics Education, V

7:00 a.m.
Improving the achievement of minorities in mathematics: A formative evaluation of a community college program.
Susan L. Ganter*, Western Washington University
(86398501)

7:30 a.m.
Formal logic and key concepts as a foundation for calculus and discrete mathematics.
Robert B. Davis*, Rutgers University, New Brunswick
(86398384)

8:00 a.m.
Minimal expanded proofs.
Annie Selden, Tennessee Technical University
John Selden*, Tennessee Technical University
(8639830)

8:30 a.m.
Learning about linear functions.
Alan H. Schoenfeld*, University of California, Berkeley
(86398337)

9:00 a.m.
Informal Discussion

Saturday January 19, 1991, 7:00 a.m.9:50 a.m.
AMSMAA Special Session on Mathematics and Education Reform, IV

7:00 a.m.
Informal Discussion

7:25 a.m.
Launching a young scholars program.
David Fried*, Boston University
(86397689)

7:50 a.m.
Helping teachers teach teachers: The American mathematics project.
Philip A. Daro*, University of California, Oakland
(86397552)

8:15 a.m.
An interim report on the college preparatory mathematics: Major change from within project.
Elaine A. Kasimatis*, California State University, Northridge
Judith Kysh, University of California, Davis
G. Thomas Sallee, University of California, Davis
(86397636)

8:40 a.m.
Supporting the involvement of mathematicians and scientists in education reform.
Philip Wagreich*, University of Illinois, Chicago
(86398553)

9:05 a.m.
Teaching via problemsolving in a semidirected format.
Bert Fristedt*, University of Minnesota, Minneapolis
(86397542)

9:30 a.m.
Calculus based upon student invention of concepts and techniques needed to solve problems.
Robert B. Davis*, Rutgers University, New Brunswick
(86397385)

Saturday January 19, 1991, 7:00 a.m.9:50 a.m.
AMSMAA Special Session on Research Papers by Undergraduates, II

7:00 a.m.
Cusp densities, commensurability, and arithmetic hyperbolic threemanifolds.
Timothy D. Comar*, Brown University
(86357408)

7:30 a.m.
Almost alternating links.
Jeffrey F. Brock*, Yale University
Timothy D. Comar, Brown University
Colin C. Adams, Williams College
John Bugbee, Williams College
Keith A. Faigin, Williams College
Amy M. Huston, Williams College
Anne M. Joseph, Williams College
David Pesikoff, Williams College
(86354545)

8:00 a.m.
An upper bound for rewritability in finite groups.
Jordan Ellenberg*, Harvard University
(86320738)

8:30 a.m.
Maximal order threerewriteable subgroups of symmetric groups.
John T. O'Bryan*, RoseHulman Institute of Technology
(86320232)

9:00 a.m.
Direct complements of invariant Langrangian subspaces.
Jonathan E. Rubin*, College of William and Mary
(86315325)

9:30 a.m.
Certain isometries on Rn.
Stanley S. Chang*, University of California, Berkeley
ChiKwong Li, College of William and Mary
(86315777)

Saturday January 19, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Computing Optimal Geometries, IV

7:00 a.m.
Proving areaminimization by slicing.
Gary R. Lawlor*, Princeton University
(86349762)

7:30 a.m.
Computer animation of photosynthesis.
Nelson Max*, Lawrence Livermore National Laboratory and University of California, Davis
(86392307)

8:00 a.m.
Hyperbolic geometry is often optimal.
William P. Thurston*, Princeton University
(86351435)

8:30 a.m.
Geometric aspects of leftventricular (LV) hemodynamic simulation based on computed tomographic (CT)studies of the beating heart.
Hadil G. Sabbagh*, New York UniversityCourant Institute
Charles S. Peskin, New York UniversityCourant Institute
(86351369)

9:00 a.m.
Variational principles arising from Bayesian image understanding.
David Mumford*, Harvard University
(86368775)

9:30 a.m.
Optimal geometries and crystal growth.
Frederick J. Almgren*, Princeton University
(86349436)

Saturday January 19, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Geometric Fourier Analysis, II

7:00 a.m.
Layer potentials and regularity of solutions to transmission problems with internal Lipschitz boundaries.
Eugene Fabes*, University of Minnesota, Minneapolis
(86335837)

7:30 a.m.
On the solvability of elliptic partial differential equations.
Robert Fefferman*, University of Chicago
(86335642)

8:00 a.m.
Competing symmetries and extremals for geometric functionals.
Eric A. Carlen*, Princeton University
(86342836)

8:30 a.m.
Conformally invariant powers of the Laplacian.
C. Robin Graham*, University of Washington
(86353234)

9:00 a.m.
Groundstate energy of large atoms.
Charles Fefferman*, Princeton University
(86381643)

9:30 a.m.
Analytic nonhypoellipticity of overline partial _b.
Michael Christ*, University of California, Los Angeles
Daryl Geller, State University of New York, Stony Brook
(86342819)

Saturday January 19, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Nonlinear Control Theory and Related Topics, II

7:00 a.m.
Informal Discussion

7:30 a.m.
Nonsmooth asymptotically stabilizing feedback controls.
Henry Hermes*, University of Colorado, Boulder
(86393220)

8:00 a.m.
On sets of attainability for nonlinear control systems.
Boris Kimelfeld*, Rutgers University, New Brunswick
(86393179)

8:30 a.m.
Algebraic differential equations and realizability.
Yuan Wang*, Florida Atlantic University
(86393174)

9:00 a.m.
NonEuclidean elastica.
Velimir Jurdjevic*, University of Toronto
(86349268)

9:30 a.m.
Fuller's phenomena.
Ivan Kupka*, University of Toronto
(86349189)

Saturday January 19, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Analytical Methods in Convexity, II

7:30 a.m.
A generalization of Blaschketype relationships.
G. D. Chakerian*, University of California, Davis
K. Hann, University of California, Davis
(8635264)

8:00 a.m.
A representation for volume involving interior reach.
Jane R. SangwineYager*, Saint Mary's College
(86352765)

8:30 a.m.
Geometric applications of the maximum principle.
Mostafa Ghandehari*, Naval Postgraduate School
(8635283)

9:00 a.m.
A note on an integral of mean curvature.
Y. D. Chai*, University of California, Davis
(86352759)

9:30 a.m.
"Curve shortening" for relative geometries.
Michael E. Gage*, University of Rochester
(86352182)

7:00 p.m.
A functional with broad applications to metric and convex geometry.
Ralph Alexander*, University of Illinois, UrbanaChampaign
(86352166)

Saturday January 19, 1991, 7:00 a.m.9:20 a.m.
AMS Special Session on Matrix Searching, Monge Arrays and Ackemann's Inverse: Algorithms and Lower Bounds, II

7:00 a.m.
Ackermann's inverse and computer circuits.
Nicholas Pippenger*, University of British Columbia
(86368804)

7:30 a.m.
Lower envelopes of line segments.
Peter Shor*, AT&T Bell Laboratories, Murray Hill, New Jersey
(86368801)

8:00 a.m.
Lower bound for the unionfind problem.
Michael L. Fredman*, Rutgers University, New Brunswick
(86368803)

8:30 a.m.
An optimal algorithm with unknown time complexity for convex matrix searching.
Lawrence L. Larmore*, University of California, Riverside
(86368802)

9:00 a.m.
Superlinear lower bounds for matrix searching algorithms.
Maria Klawe*, University of British Columbia,
(86368800)

Saturday January 19, 1991, 7:00 a.m.9:50 a.m.
AMS Special Session on Arithmetical Algebraic Geometry, IV

7:00 a.m.
Congruences of modular forms on Shimura curves.
Fred Diamond*, Columbia University
Richard Taylor, Cambridge University, England
(86311241)

7:30 a.m.
Cap lambdaadic modular symbols and padic periods of modular forms.
Ralph Greenberg, Boston University
Glenn Stevens*, Boston University
(86314243)

8:00 a.m.
The local representation at p corresponding to a modular form mod p.
Bas Edixhoven*, University of California, Berkeley
(86314259)

8:30 a.m.
On certain classes in the cohomology of Siegal modular threefolds.
Neils Nygaard*, University of Chicago
(86314739)

9:00 a.m.
Constraints on Galois representations.
Nigel Boston*, University of Illinois, UrbanaChampaign
(86311366)

9:30 a.m.
An example of nonvanishing Beilinson regulator.
M. V. Nori*, University of Chicago
(86311747)

Saturday January 19, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#11: Part B
A survey of educational software
Organizers:
Virginia Knight, Meredith College
Vivian Kraines, Meredith College

Saturday January 19, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#12: Part B
Writing in mathematics courses
Organizers:
George D. Gopen, Duke University
David A. Smith, Duke University

Saturday January 19, 1991, 7:00 a.m.9:00 a.m.
MAA Minicourse \#16: Part A
A mathematician's introduction to the HP48SX scientific expandable calculator for firsttime users
Organizers:
John Kenelly, Clemson University
Don LaTorre, Clemson University

Saturday January 19, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Group Theory and Algebra

7:00 a.m.
Ergodic extensions.
Edgar Reyes*, Southeastern Louisiana University
(8632050)

7:15 a.m.
Lattice isomorphic Abelian group.
John Poland, Carleton University
Kazem Mahdavi*, State University of New York, College at Potsdam
(8632072)

7:30 a.m.
Covering cyclic groups with sections.
Ali A. DadDel*, University of California, Davis
(86320717)

7:45 a.m.
Convergence to uniform on the finite Heisenberg group.
Maria Zack*, Texas Tech University
(86320565)

8:00 a.m.
A note on Von Dyck groups.
K. S. Wang*, Pennsylvania State University, New Kensington Campus
L. C. Grove, University of Arizona
(86320504)

8:15 a.m.
A density theorem for bicategories.
Robert Gordon*, Temple University, Philadelphia
A. J. Power, University of Edinburgh, Scotland
(86318344)

8:30 a.m.
Purirepresentable functors.
Alexandru Solian*, University of North Carolina, Charlotte
T. M. Viswanathan, University of North Carolina, Wilmington
(86318318)

8:45 a.m.
Nonstandard methods and finiteness conditions in algebra.
Matt Insall*, University of Missouri, Rolla
(86308158)

9:00 a.m.
What is a representation of a universal algebra?
William H. Rowan*, Oakland, California
(8630890)

9:15 a.m.
On the Cartesian closedness of topological algebras.
Vijaya L. Gompa*, Ball State University
(8632267)

9:30 a.m.
Schrodinger operators on coadjoint orbits.
Ziad S. Haddad*, La Jolla Insitute
(8632271)

9:45 a.m.
The Radon transform on finite groups.
Elinor Velasquez*, University of California at San Diego, La Jolla
(86344386)

Saturday January 19, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Partial Differential Equations, I

7:00 a.m.
Breathers and nonlinear wave equations.
Satyanad Kichenassamy*, University of Minnesota, Minneapolis
(86335155)

7:15 a.m.
Antiperiodic boundary value problems for higher order differential equations in Hilbert spaces.
Reza Aftabizadeh, Ohio University, Athens
Sergiu Aizicovici, Ohio University, Athens
Nicolae Pavel*, Ohio University, Athens
(86335473)

7:30 a.m.
Antiperiodic solutions to a class of abstract first and secord order evolution equations.
Reza Aftabizadeh, Ohio University, Athens
Sergiu Aizicovici*, Ohio University, Athens
Nicolae Pavel, Ohio University, Athens
(86335472)

7:45 a.m.
Monotone method for nonlocal problems.
A. S. Vatsala*, University of Southwestern Louisiana
(86335665)

8:00 a.m.
An algebra of generalized functions and solvability of differental equations.
Todor Todorov*, California Polytechnic State University
(86335846)

8:15 a.m.
An L1 equation error method for identifying coefficients of elliptic equations.
Robert Acar*, University of California, Riverside
Semian Gutman, University of Oklahoma
(86335820)

8:30 a.m.
A counterexample concerning the behavior of the pressure at time t=0 in the NavierStokes equations.
Owen Walsh*, University of British Columbia
John G. Heywood, University of British Columbia
(86335756)

8:45 a.m.
On periodic solutions to a nonresonant quasilinear parabolic equation.
Lew Lefton*, University of New Orleans
Victor Shapiro, University of California, Riverside
(86335753)

9:00 a.m.
Nonlinear reactor multigroup neutron transport system: Existence and stability problems.
Anthony W. Leung*, University of Cincinnati
Gen Shun Chen, National Tsing Hua University, Taiwan, People's Republic of China
(86335732)

9:15 a.m.
Localization of dependence for solutions of hyperbolic partial differential equations.
Henry A. Warchall*, University of North Texas
(8633570)

9:30 a.m.
The determination of the surface impedance of an obstacle.
Andrzej W. Kedzierawski*, Delaware State College
(86335656)

Saturday January 19, 1991, 7:00 a.m.9:25 a.m.
AMS Session on Functional Analysis, I

7:00 a.m.
Maximal ideals in local Carleman algebras.
Jamil A. Siddiqi*, Universit\'e Laval
(86346249)

7:15 a.m.
Positive discrete dynamical systems.
Ulrich Krause*, University of Bremen, Federal Republic of Germany
(86346278)

7:30 a.m.
A condition for a quasibarrelled (DF) space to be bornological.
Thomas E. Gilsdorf*, University of North Dakota, Grand Forks
(86346352)

7:45 a.m.
Series representations of integrals.
Ivan Dobrakov*, University of California, Riverside
(86346444)

8:00 a.m.
Holomorphic functions in tubes associated with ultradistributions.
Richard D. Carmichael*, Wake Forest University
R. S. Pathak, Banaras Hindu University, India
S. Pilipovi\'c, University of Novi Sad, Yugoslavia
(8634646)

8:15 a.m.
Directional derivatives of the trace norm.
Russell Bilyeu*, University of North Texas
(86346474)

8:30 a.m.
Noncompact operators on continuous function spaces.
Catherine Abbott, Francis Marion College
Elizabeth Bator, University of North Texas
Paul Lewis*, University of North Texas
(86346492)

8:45 a.m.
Strictly singular and strictly cosingular operators on continuous function spaces.
Catherine Abbott, Francis Marion College
Elizabeth Bator*, University of North Texas
Paul Lewis, University of North Texas
(86346493)

9:00 a.m.
On the Ktheory of analytic crossed products.
Paul Muhly, University of Iowa
Chaoxin Qiu*, University of Iowa
(86346497)

9:15 a.m.
On the KadecKlee property.
BorLuh Lin, University of Iowa
Wenyao Zhang*, University of Iowa
(86346499)

Saturday January 19, 1991, 7:00 a.m.9:40 a.m.
AMS Session on Topology, II

7:00 a.m.
On transversal subwebs of an (n+1)web.
Vladislav V. Goldberg*, New Jersey Institute of Technology
(86353311)

7:15 a.m.
On commutativity of products of the Nachbin compactification.
Margaret A. Gamon*, Carroll College
D. C. Kent, Washington State University
(86354359)

7:30 a.m.
The AttouchWets topology: A modification of the Hausdorff metric topology.
Gerald Beer*, California State University, Los Angeles
(86354398)

7:45 a.m.
On nearly open sets in bitopological spaces.
Jamuna P. Ambasht*, Benedict College
(86354550)

8:00 a.m.
Completeness of lambda+ (X).
Robert A. McCoy, Virginia Polytechnic Institute and State University
Aaron R. Todd*, City College, City University of New York
(86354703)

8:15 a.m.
An approach to extensions of convergence spaces.
Ellen E. Reed*, Trinity School
(86354779)

8:30 a.m.
Finitely cyclic homogeneous continua.
Pawel Krupski, Tulane University
James T. Rogers, Jr.*, Tulane University
(86354789)

8:45 a.m.
Wallman compactifications in fuzzy topological spaces.
Ralph C. Steinlage*, University of Dayton
R. Lowen, RUCA, Antwerp, Belgium
P. Wuyts, RUCA, Antwerp, Belgium
(86354825)

9:00 a.m.
On some problems of K. Morita and H. Tamano.
Norm Howes*, Institute for Defense Analyses
(86354831)

9:15 a.m.
A retraction of the character variety for representations of a free group of rank n in SL_2 for n>=3.
J. Stuart Bratholdt*, University of California, Santa Barbara
(86354841)

9:30 a.m.
A compactification of an arbitrary topological space obtained by the Afilter process.
Hueytzen J. Wu*, Texas A\thsp\&\thsp I University, Kingsville
(86354864)

Saturday January 19, 1991, 7:00 a.m.9:55 a.m.
AMS Session on Analysis and Fluid Mechanics

7:00 a.m.
On some extension of the Pontryagin type maximum principle to the abnormal optimal control problems.
Urszula LedzewiczKowalewska*, Southern Illinois University
(86349731)

7:15 a.m.
Existence of discontinuous solutions in calculus of variation on infinite horizon.
Zengniang Tong*, University of Delaware
(86349143)

7:30 a.m.
Discrete variable methods for nonlinear extremal problems involving PDE.
John Gregory*, Southern Illinois University, Carbondale
Cantian Lin, Southern Illinois University, Carbondale
(86349191)

7:45 a.m.
Singular problems of calculus of variations solved by equivalent problems.
Donald R. Snow*, Brigham Young University
(86349211)

8:00 a.m.
A variational problem governed by Filippov's evolution equation.
Toru Maruyama*, Keio University, Japan
(86349350)

8:15 a.m.
The sensitivity of optimal control problems to time delay.
Frank H. Clarke, University of Montreal
Peter R. Wolenski*, Louisiana State University, Baton Rouge
(86349588)

8:30 a.m.
Holding sets in infinite dimensional control systems.
Emilio O. Roxin*, University of Rhode Island
(86349672)

8:45 a.m.
On permanent capillarheavy waves in infinite channels.
Nabil Moussa*, American University in Cairo, Egypt
(8637660)

9:00 a.m.
1D closure models for slender viscoelastic fluid jets.
Karen D. Bolinger*, Arkansas State University
(86376564)

9:15 a.m.
Symmetry breaking and active deflection in Snell's law.
Mohsen Maesumi*, Tulane University
(86376563)

9:30 a.m.
Integrability of the Lorenz equations via the Painleve property.
Bhimsen K. Shivamoggi, University of Central Florida
Ram N. Mohapatra*, University of Central Florida
(86376383)

9:45 a.m.
On a pulsatile flow of a twophase viscous fluid in a tube of elliptic crosssection.
Lokenath Debnath*, University of Central Florida
(86376250)

Saturday January 19, 1991, 7:00 a.m.9:55 a.m.
MAA Session on Alternatives to the Lecture Method, III

7:00 a.m.
Mathematics by values, or "Why I hate mathematics."
Raymond F. Coughlin*, Temple University

7:20 a.m.
A rapid change of pace and group activities can enliven almost any class.
Carole A. Bauer*, Triton College

7:40 a.m.
Every teaching method I need to know I learned in elementary school.
David E. Boliver*, Trenton State College

8:00 a.m.
Reviving the spirit in a mathematics classroom.
Clement E. Falbo*, Sonoma State University
Thomas P. Falbo, Ohlone College

8:20 a.m.
"Brainstorming" in the classroom.
Ben Goertzel*, University of Nevada, Las Vegas

8:40 a.m.
Fifteen years of PSI at PSU.
Marguerite Gravez*, Pennsylvania State University, Allentown Campus

9:00 a.m.
Small groups in a liberal arts math course.
Robert A. Fontenot*, Whitman College

9:20 a.m.
Group learning in traditional lower division courses.
C. Patrick Collier*, University of Wisconsin, Oshkosh

9:40 a.m.
Cooperative group learning in college algebra.
Elton E. Beougher*, Fort Hays State University

Saturday January 19, 1991, 7:00 a.m.8:20 a.m.
MAA CUPM Subcommmittee on Assessment of Undergraduate Majors Panel Discussion
Assessment: Definitions and examples
Organizers:
Bernard L. Madison, University of Arkansas

Saturday January 19, 1991, 7:05 a.m.9:45 a.m.
MAA Session on Statistics and Probability, III

7:05 a.m.
Statistics and Macintosh computers: Using HyperCard to teach statistics.
Walter Chromiak, Dickinson College
Allan Rossman*, Dickinson College

7:20 a.m.
Elementary integrated statistics via electronic classroom: A course.
Homer Austin, Salisbury State University
Barbara Wainwright*, Salisbury State University

7:35 a.m.
The design and implementation of a statistics microcomputer laboratory classroom.
Richard A. Alo*, University of HoustonDowntown
Carol Jones Vobach, University of HoustonDowntown

7:50 a.m.
Research papers in a business statistics course.
Pat Foard*, South Plains College

8:05 a.m.
A computer component for a probability course.
Joan T. Hallett*, California State University, San Bernardino

8:20 a.m.
Recommendations from industrial experience for college statistics courses.
Raymond N. Greenwell*, Hofstra University

8:35 a.m.
Turning statistics on itself: Data analysis and simple approximation theorems.
Robert Decker*, University of Hartford

8:50 a.m.
Classroom presentations aimed at decreasing the misuse of Pearson's Correlation Coefficient.
Barbara Alvin*, Eastern Washington University

9:05 a.m.
Geometric models for teaching factor analysis.
Sylvia M. Svitak*, Queensborough Community College

9:20 a.m.
An approach to independent sets.
Harris S. Shultz*, California State University, Fullerton
Ray C. Shiflett, Mathematical Sciences Education Board, Washington, DC

9:35 a.m.
Copulas, characterization, correlation, and counterexamples.
Roger B. Nelsen*, Lewis and Clark College and Mount Holyoke College

Saturday January 19, 1991, 7:50 a.m.9:50 a.m.
MAA Session on Using History in the Teaching of Mathematics, II

7:50 a.m.
An alternative approach to the history of mathematics.
Claudia A. Henrion*, Middlebury College and Dartmouth College

8:15 a.m.
Mathematics of the bells.
Angela B. Shiflet*, Wofford College

8:40 a.m.
A history course designed around ideas.
Joseph F. Conrad*, Pennsylvania State University, Altoona

8:55 a.m.
A Women's History Month project: Famous women in mathematics.
Regina Baron Brunner*, Cedar Crest College

9:10 a.m.
Undergraduate history of mathematics: Success from teamteaching.
Stuart Anderson*, East Texas State University

9:25 a.m.
The history of mathematics as taught in a seminar.
Herbert E. Kasube*, Bradley University

9:40 a.m.
The rise and fall of Euclidean geometry.
Mark Huibregtse*, Skidmore College and Texas A & M University

Saturday January 19, 1991, 8:00 a.m.8:50 a.m.
MAA Special Presentation

8:00 a.m.
Symbolic computation in geometry and algebra.
Dana S. Scott*, Carnegie Mellon University

Saturday January 19, 1991, 8:00 a.m.9:55 a.m.
AMS Special Session on Turbulence, Mathematical Aspects, II

8:00 a.m.
A rigorous mathematical approach to decaying selfsimilar homogeneous turbulence.
Ciprian Foias*, Indiana University, Bloomington
(86335406)

8:40 a.m.
Informal Discussion

9:00 a.m.
Deterministic analogues of turbulence.
Peter D. Lax*, Courant Institute of Mathematical Sciences, New York University
(86376117)

9:40 a.m.
Informal Discussion

Saturday January 19, 1991, 9:00 a.m.9:55 a.m.
NAM Business Meeting

Saturday January 19, 1991, 9:05 a.m.9:55 a.m.
MAA Invited Address
The Nbody problem: Where parallel algorithms, graph theory, and fluid dynamics meet.
Jill P. Mesirov*, Thinking Machines Corporation.

Saturday January 19, 1991, 10:10 a.m.11:00 a.m.
AMSMAA Invited Address
Compound soap bubbles, shortest networks, and minimal surfaces.
Frank Morgan*, Williams College and Institute for Advanced Study

Saturday January 19, 1991, 11:00 a.m.12:00 p.m.
National Science Foundation Informal Discussion Group on Education and Research

Saturday January 19, 1991, 12:00 p.m.1:00 p.m.
NAM ClaytorWoodard Lecture

Saturday January 19, 1991, 12:00 p.m.4:20 p.m.
AMSMAA Special Session on Research Papers by Undergraduates, III

12:00 p.m.
Computing Fibonacci numbers rapidly.
Brendan J. Babb*, Oregon State University
(86311823)

12:30 p.m.
Coordinatefree generalizations of the Gershgorin Circle Theorem.
Andrew H. Kresch*, Yale University
Jill R. Kelly, Yale University
Lily Khadjavi, Harvard University
Keith M. Slonski, Gettysburg College
Irene Thomas, Mount Holyoke College
(86315824)

1:00 p.m.
Convergence problems for finite sets of matrices.
Jos\'e Miguel Urbano*, University of Coimbra, Portugal
(86315525)

1:30 p.m.
When the sum of the cubes is the square of the sum.
Jerald Bope, Williams College
Joel Foisy, Williams College
Shea Friedland, Williams College
Maura Gallagher, Williams College
Deidre D. Goodwin*, Willliams College
Jennifer Gyori, Williams College
Thomas Tucker, Williams College
(86305863)

2:00 p.m.
The number of residues in the Fibonacci sequence modulo P.
Heather M. Johnston*, University of Chicago
(86311868)

2:30 p.m.
Critical points of real polynomials in two variables.
Alan Durfee, Mount Holyoke College
Jeff Roy*, Harvard University
Nathan Kronenfeld, Harvard University
Heidi Munson, St. Olaf College
Ina Westby, Saint Olaf College
(86314746)

3:00 p.m.
Distances forbidden by some twocoloring of Q^2.
Dave Witte, Williams College
Michael Reid*, University of California, Berkeley
Douglas S. Jungreis, University of California, Berkeley
(86399877)

3:30 p.m.
Characterization of the ShapleyShubik and Banzhaf power indices with transfer and fairness axioms.
ChengJih Chen*, Columbia University
David Housman, Drew University
(86390878)

4:00 p.m.
The classification of minimal nonprimepower order groups.
David P. Moulton*, University of California, Berkeley
Joseph A. Gallian, University of Minnesota, Duluth
(86320867)

Saturday January 19, 1991, 12:00 p.m.4:20 p.m.
AMS Special Session on Geometric Fourier Analysis, III

12:00 p.m.
Harmonic measure for the exterior of a convex domain.
David Jerison*, Massachusetts Institute of Technology
(86335541)

12:30 p.m.
Some nonlinear problems related to harmonic measure.
Peter Jones*, Yale University
(8634222)

1:00 p.m.
Spectral gaps.
Daniel W. Stroock*, Massachusetts Institute of Technology
(86360850)

1:30 p.m.
Estimates for homogeneous and inhomogeneous boundary value problems.
Carlos E. Kenig*, University of Chicago
(86335770)

2:00 p.m.
On the circular maximal function.
Gerd Mockenhaupt*, University of California, Los Angeles
(86342835)

2:30 p.m.
The Neumann problem for second order divergence form elliptic operator.
Jill Pipher*, Brown University
(86335840)

3:00 p.m.
Averages over convex hypersurfaces.
Andreas Seeger*, Princeton University
Alexander Nagel, University of Wisconsin, Madison
Stephen Wainger, University of Wisconsin, Madison
(8634262)

3:30 p.m.
Problems related to local smoothing of Fourier integral operators.
Christopher D. Sogge*, University of California, Los Angeles
(8633540)

4:00 p.m.
Lewy's harmonic gradient mappings in higher dimensions.
Stewart Gleason, Prudential Reinsurance Company, Newark, New Jersey
Thomas Wolff*, California Institute of Technology
(86335156)

Saturday January 19, 1991, 12:00 p.m.3:50 p.m.
AMS Special Session on Nonlinear Control Theory and Related Topics, III

12:00 p.m.
Semigroup methods in system theory on Lie groups.
Jimmie D. Lawson*, Louisiana State University, Baton Rouge
(86393265)

12:30 p.m.
Optimal control and differential games with measures.
E. N. Barron*, Loyola University of Chicago
R. Jensen, Loyola University of Chicago
J. L. Menaldi, Wayne State University
(86349109)

1:00 p.m.
Deterministic control theory and viscosity solutions of Bellman's equations.
Lawrence C. Evans*, University of California, Berkeley
(86335221)

1:30 p.m.
Dynamic programming for problems with unbounded controls.
James R. Dorroh, Louisiana State University, Baton Rouge
Guillermo Ferreyra*, Louisiana State University, Baton Rouge
(86393110)

2:00 p.m.
Informal Discussion

2:30 p.m.
Saturated outputs for high gain selfexciting networks.
Morris W. Hirsch*, University of California, Berkeley
(8633435)

3:00 p.m.
The free Lie algebra and the symmetric group.
Adriano M. Garsia*, University of California at San Diego, La Jolla
(86305222)

3:30 p.m.
Spectral geometry of Riemannian foliations.
Seiki Nishikawa, Tohoku University, Japan
Philippe Tondeur*, University of Illinois, UrbanaChampaign
Lieven Vanhecke, Catholic University, Leuven, Belgium
(8635812)

Saturday January 19, 1991, 12:00 p.m.2:50 p.m.
AMS Special Session on Analytical Methods in Convexity, III

12:00 p.m.
Averages of planar sections of convex bodies.
Paul Goodey*, University of Oklahoma
Wolfgang Weil, University of Karlsruhe, West Germany
(86352167)

12:30 p.m.
Continuous dependence of eigenvalues on the domain.
Ralph Howard*, University of South Carolina, Columbia
Paul Sisson, University of South Carolina, Columbia
(86352404)

1:00 p.m.
kdimensional and Gstructured aspects of convex bodies.
Eric L. Grinberg*, Temple University, Philadelphia
(86353382)

1:30 p.m.
Convex sets determined by finitely many Xrays.
R. J. Gardner*, University of California, Davis
(86352292)

2:00 p.m.
Overlap problems for convex bodies and inequalities for mixed volumes.
Wolfgang Weil*, University of Karlsruhe, West Germany
(86352168)

2:30 p.m.
Worn stones.
Wm. J. Firey*, Oregon State University
(8635269)

Saturday January 19, 1991, 12:00 p.m.2:00 p.m.
MAA Minicourse \#10: Part C
Chaotic dynamical systems
Organizers:
Robert L. Devaney, Boston University

Saturday January 19, 1991, 12:00 p.m.2:00 p.m.
MAA Minicourse \#13: Part B
Great theorems from mathematical analysis: 16891881
Organizers:
William Dunham, Hanover College

Saturday January 19, 1991, 12:00 p.m.2:00 p.m.
MAA Minicourse \#14: Part B
Actuarial mathematics
Organizers:
Jonathan Kane, University of Wisconsin, Whitewater

Saturday January 19, 1991, 12:00 p.m.2:00 p.m.
MAA Minicourse \#15: Part B
Learning abstract algebra by programming in ISETL
Organizers:
Ed Dubinsky, Purdue University
Uri Leron, Technion\endash IIT

Saturday January 19, 1991, 12:00 p.m.2:40 p.m.
AMS Session on Commutative Algebra and Algebraic Geometry

12:00 p.m.
LCMstability of extensions of formal power series rings characterizes Dedekind domains.
John T. Condo*, University of Tennessee, Knoxville
(86313653)

12:15 p.m.
Matlis reflexive modules.
Richard G. Belshoff*, Southwest Missouri State University
(86313733)

12:30 p.m.
Splitting of prime ideals and valuations.
Bao Ping Jia*, University of Nebraska, Lincoln
(86313757)

12:45 p.m.
The AuslanderReiten quiver of a Dedekind domain.
Jeremy Haefner*, University of Colorado, Colorado Springs
(86313772)

1:00 p.m.
Schemes of glueing dimension zero.
Khomo T. S. Mohapeloa*, Pennsylvania State University, University Park
(86314481)

1:15 p.m.
Surfaces in Gr P^3.
Mark W. Gross*, University of Michigan, Ann Arbor
(86314626)

1:30 p.m.
Classification of rational polynomials with a C*fiber.
Shulim Kaliman*, Wayne State University
(86314340)

1:45 p.m.
On singular Schubert varieties in G/P.
James S. Wolper*, University of Western Ontario and Hamilton College
(86314328)

2:00 p.m.
A conjecture about rational space curves.
Sherwood Washburn*, Seton Hall University
(86314324)

2:15 p.m.
Stable vector bundles on Enriques surfaces.
Hoil Kim*, University of Michigan, Ann Arbor
(86314124)

2:30 p.m.
Axics  a 3D algebra.
Michael F. Smith*, University of Connecticut, Storrs
(86314242)

Saturday January 19, 1991, 12:00 p.m.4:10 p.m.
AMS Session on Partial Differential Equations, II

12:00 p.m.
Maximum principles for weakly coupled parabolic systems.
Chiping Zhou*, University of Hawaii, Honolulu
(86335646)

12:15 p.m.
Scattering from full tensor bianisotropic structuresA class of exact solutions.
D. K. Cohoon*, West Chester University
(86335635)

12:30 p.m.
Formally hypoelliptic operators.
Ralph A. Artino*, City College, City University of New York
Jose BarrosNeto, Rutgers University, New Brunswick
(86335621)

12:45 p.m.
A boundary value problem for twodimensional wave equation.
Nezam Iraniparast*, Western Kentucky University
(86335615)

1:00 p.m.
A symmetry reduction of the equations for a fourlevel solid state laser system.
Martha Abell*, Georgia Southern University
Lila Roberts, Georgia Southern University
(86335578)

1:15 p.m.
Continuous dependence of antiperiodic solutions.
Zhixiong Cai*, Ohio University, Athens
(86335569)

1:30 p.m.
Dead cores of semilinear reactiondiffusion systems.
C. Y. Chan, University of Southwestern Louisiana
TaiWai Fung*, University of Southwestern Louisiana
(86335566)

1:45 p.m.
Approximating the solutions of certain first order partial differential equations.
H. Poorkarimi*, University of TexasPan American
(86335561)

2:00 p.m.
Unique solvability of NavierStokes equations in a half space.
Huakang Chang*, University of British Columbia
(86335532)

2:15 p.m.
Spacially nontemperate pseudodifferential operators and sphere extensions.
Houshang H. Sohrab*, Towson State University
(8633548)

2:30 p.m.
Adsorption in R^n, II.
Seth F. Oppenheimer*, Mississippi State University
(86335446)

2:45 p.m.
Long time classical solutions of a nonlinear wave equation.
John A. Crow*, Oregon State University
(86335442)

3:00 p.m.
Anticrowding population models in several space variables.
Gaston E. Hernandez*, University of Connecticut, Storrs
(86335348)

3:15 p.m.
The approximation approach for overdetermined and underdetermined boundary value problems.
Selim Krein, Institute of Forest Technology, USSR
Serge Lvin*, University of Maine, Orono
(86335246)

3:30 p.m.
Geometrical evolution of the interfaces in the FitzHughNagumo equations.
PeiLi Chen*, Southern Illinois University, Carbondale
(86335154)

3:45 p.m.
On a Stefan problem for quasilinear parabolic equation.
Igor Malyshev*, San Jose State University
(86335153)

4:00 p.m.
Singularities in the YangMills equations.
Thomas Otway*, University of Texas, Austin
(86335118)

Saturday January 19, 1991, 12:00 p.m.3:40 p.m.
AMS Session on Functional Analysis, II

12:00 p.m.
Shift operators on C(K).
M. Rajagopalan*, Tennessee State University
(8634654)

12:15 p.m.
On the origin of weak convergence.
John J. Saccoman*, Seton Hall University
(8634656)

12:30 p.m.
On the asymptoticnorming property of Banach spaces.
Zhibao Hu*, University of Iowa
BorLuh Lin, University of Iowa
(86346570)

12:45 p.m.
Rational moment problems for closed sets.
James D. Chandler, Jr.*, East Carolina University
(86346593)

1:00 p.m.
Khinchine's inequality and Carleson measures.
Daniel H. Luecking*, University of Arkansas
(86346627)

1:15 p.m.
Isometries of function spaces.
J. Jamison*, Memphis State University
A. Kaminska, Memphis State University
(86346676)

1:30 p.m.
Quasitriangular subalgebras of semifinite von Neumann algebras are closed.
Victor Kaftal*, University of Cincinnati
Gary Weiss, University of Cincinnati
David Larson, Texas A\thsp\&\thsp M University, College Station
(86346701)

1:45 p.m.
A Nehari type theorem.
Victor G. Kaftal, University of Cincinnati
Gary Weiss*, University of Cincinnati
David Larson, Texas A\thsp\&\thsp M University, College Station
(86346702)

2:00 p.m.
Isometries of spaces of analytic functions.
Krzysztof Jarosz*, Southern Illinois University, Edwardsville
(86346716)

2:15 p.m.
A remark on geometry of Banach lattices.
K. Sundaresan*, Cleveland State University
(86346783)

2:30 p.m.
Composition of distributions of several variables.
Piotr Antosik*, California Polytechnic State University
(86346794)

2:45 p.m.
Extreme npositive linear maps.
SzeKai Tsui*, Oakland University
(86346827)

3:00 p.m.
On a problem of A. S. Wightman.
Leonid Romanyuk*, San Jose State University
(86346845)

3:15 p.m.
Smoothing integrable functions.
William Margulies*, California State University, Long Beach
(86346849)

Saturday January 19, 1991, 12:00 p.m.4:30 p.m.
MAA Session on Alternatives to the Lecture Method, IV

12:00 p.m.
Enliven finite mathematics: Use cooperative learning, journal writing, and individual projects.
Regina Baron Brunner*, Cedar Crest College

12:20 p.m.
Alternatives to the lecture method: Group problems.
Aaron I. Stucker*, United States Naval Academy

12:40 p.m.
Making students players, not spectators.
Douglas H. Underwood*, Whitman College

1:00 p.m.
Making eye contact over the computers.
Margie Hale*, Ithaca College

1:20 p.m.
Active involvment and shared responsibilities by students.
Marcia Birken*, Rochester Institute of Technology
Sally Fischbeck, Rochester Institute of Technology

1:40 p.m.
Integration of a successful performance enhancement strategy into an instructional delivery format.
Charles H. Roberts*, Michigan State University, East Lansing

2:00 p.m.
Teaching calculus in a laboratory.
Robert Decker*, University of Hartford

2:20 p.m.
Replacing lectures with discussions and computer experiences.
Nancy Baxter*, Dickinson College
Ed Dubinsky, Purdue University, West Lafayette

2:40 p.m.
Intelligent computeraided instruction: An interactive approach to mathematics education.
Richard O'Lander*, St. John's University

3:00 p.m.
Adapting the "learning cycle" to mathematics.
Richard A. Mitchell*, University of Wisconsin, Stevens Point

3:20 p.m.
Proofs and axiom systems for freshmen.
Anthony D. Berard Jr.*, King's College

3:40 p.m.
The enhancement of concept development in calculus through the use of the graphing calculator.
Juan Melin*, University of Iowa

4:00 p.m.
A cooperative learning intervention among mathematicallyatrisk college students in intermediate college algebra.
G. Joseph Wimbish*, Huntingdon College

4:20 p.m.
Using management to teach mathematics.
William E. Fenton*, Bellarmine College

Saturday January 19, 1991, 12:00 p.m.2:00 p.m.
AMSMAA Committee on Employment and Educational Policy Panel Discussion
The employment process: How can we do better?

Saturday January 19, 1991, 12:00 p.m.2:00 p.m.
MAANCTM Panel Discussion
Discrete mathematics: Making the connection between the high school and college curricula
Moderators:
Don S. Balka, Saint Mary's College
s:
Bernadette H. Perham, Ball State University
Stephen B. Maurer, Swarthmore College
Timothy V. Craine, Trinity College

Saturday January 19, 1991, 1:00 p.m.3:00 p.m.
AMS Special Session on Turbulence, Mathematical Aspects, III

1:00 p.m.
Vortex equilibria in turbulence theory and quantum analogues.
Alexandre J. Chorin*, University of California, Berkeley
(8637610)

1:40 p.m.
Informal Discussion

2:00 p.m.
Vorticity and renormalization in turbulence.
Andrew J. Majda*, Princeton University
(8637681)

2:40 p.m.
Informal Discussion

Saturday January 19, 1991, 2:15 p.m.4:15 p.m.
MAA Minicourse \#12: Part C
Writing in mathematics courses
Organizers:
George D. Gopen, Duke University
David A. Smith, Duke University

Saturday January 19, 1991, 2:15 p.m.4:15 p.m.
MAA Minicourse \#15: Part C
Learning abstract algebra by programming in ISETL
Organizers:
Ed Dubinsky, Purdue University
Uri Leron, Technion\endash IIT

Saturday January 19, 1991, 2:15 p.m.4:15 p.m.
MAA Minicourse \#16: Part B
A mathematician's introduction to the HP48SX scientific expandable calculator for firsttime users
Organizers:
John Kenelly, Clemson University
Don LaTorre, Clemson University

Saturday January 19, 1991, 2:15 p.m.4:15 p.m.
MAA Minicourse \#17: Part B
Instituting a mathematics placement program: Creating order out of chaos in freshman mathematics
Organizers:
Mary McCammon, Pennsylvania State University

Saturday January 19, 1991, 2:30 p.m.4:00 p.m.
AMS Committee on Science Policy Panel Discussion
How can the AMS help the international mathematics community
Inquiries: meet@ams.org