Joint Mathematics Meetings Program by Special Session
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1993 Joint Mathematics Meetings
San Antonio, TX, January 1316, 1993
Meeting #878
Associate secretaries:
W Wistar Comfort, AMS wcomfort@wesleyan.edu
Kenneth A Ross, MAA ross@math.uoregon.edu
AMS Special Session on Differential Geometry

Wednesday January 13, 1993, 2:15 p.m.6:05 p.m.
AMS Special Session on Differential Geometry, I

2:15 p.m.
Length comparisons for closed curves in Alexandrov spaces with curvature bounded above.
Stephanie B. Alexander, University of Illinois, UrbanaChampaign
Richard L. Bishop*, University of Illinois, UrbanaChampaign
(87853894)

2:45 p.m.
Proper conformal symmetries of spacetimes with divergencefree Weyl conformal tensor.
Ramesh Sharma*, University of New Haven
(8785341)

3:15 p.m.
The "total Scalar curvature" as a symplectic invariant.
David E. Blair*, Michigan State University
(8785338)

3:45 p.m.
Curves and surfaces.
Alfred Gray*, University of Maryland, College Park
(87853770)

4:15 p.m.
Lightlike submanifolds of semiRiemannian manifolds.
Aurel Bejancu, Polytechnic Institute of Iasi, Romania
K. L. Duggal*, University of Windsor
(8785397)

4:45 p.m.
Classical geometries arising in feedback equivalence of control systems.
Robert B. Gardner*, University of North Carolina, Chapel Hill
(87849362)

5:15 p.m.
Absolute equivalence of differential systems and applications to control theory.
W. F. Shadwick*, The Fields Institute, Ontario, Canada
(87858469)

5:45 p.m.
Conservation laws for Darbouxintegrable hyperbolic equations in the plane.
N. Kamran*, McGill University,
(87858341)

Thursday January 14, 1993, 8:00 a.m.10:50 a.m.
AMS Special Session on Differential Geometry, II

8:00 a.m.
Astigmatic conjugacy and achronal boundaries.
Paul Ehrlich*, University of Florida
Gerard Emch, University of Florida
(87853109)

8:30 a.m.
Spaces of geodesics.
John K. Beem, University of Missouri, Columbia
Robert J. Low, Coventry Polytechnic, United Kingdom
Phillip E. Parker*, Wichita State University
(87853121)

9:00 a.m.
Casuality and Cauchy horizons.
John K. Beem*, University of Missouri
Andrzej Krolak, Polish Academy of Sciences, Poland
(8785319)

9:30 a.m.
Conformally stationary spacetimes. Hausdorff orbit spaces, and the shape of space.
Steven G. Harris*, Saint Louis University
Robert J. Low, Coventry University, United Kingdom
(8785376)

10:00 a.m.
Aspects of Lorentzian Busemann functions.
Gregory J. Galloway*, University of Miami
Arnaldo Horta, University of Miami
(87883923)

10:30 a.m.
Discussion

Thursday January 14, 1993, 2:15 p.m.4:05 p.m.
AMS Special Session on Differential Geometry, III

2:15 p.m.
Harmonic deformations.
BangYen Chen*, Michigan State University
(8785342)

2:45 p.m.
Some low type submanifolds of projective spaces.
Ivko Dimitric*, Pennsylvania State University, Uniontown
(87853376)

3:15 p.m.
Variational problems on contact manifolds.
Shangrong Deng*, Southern College of Technology
(87853343)

3:45 p.m.
A solution of Ambrose's problem in dimension two.
James J. Hebda*, Saint Louis University
(8785325)
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