AMS Sectional Meeting Full Program
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Inquiries: meet@ams.org
1997 Spring Eastern Sectional Meeting
College Park, MD, April 1213, 1997
Meeting #920
Associate secretaries:
Lesley M Sibner, AMS
lsibner@duke.poly.edu
Saturday April 12, 1997

Saturday April 12, 1997, 7:30 a.m.4:00 p.m.
Registration
Rotunda, Mathematics Building

Saturday April 12, 1997, 7:30 a.m.4:00 p.m.
Exhibit and Book Sale
Rotunda, Mathematics Building

Saturday April 12, 1997, 8:00 a.m.10:50 a.m.
Special Session on Lie Groups and Automorphic Forms, I
Room 0407, Mathematics Building
Organizers:
Jianshu Li, University of Maryland jianshu@uxmail.ust.hk
Gordan Savin, University of Utah savin@math.utah.edu

8:00 a.m.
One K type Representations
Dan M Barbasch*, Cornell University
(92022175)

8:30 a.m.
Character Sheaves and Minimal Representations over Finite Fields
Karl E. Rumelhart*, Stanford University
(92022156)

9:00 a.m.
Periods of Residual Representations
Dihua Jiang*, Yale University
(92022170)

9:30 a.m.
An integral transform and ladder representations of $U(p,q)$
John D Lorch*, Wingate University
(92022104)

10:00 a.m.
Hecke algebras of symplectic groups over padic fields
Julee Kim*, Yale University
(9202234)

10:30 a.m.
An exceptional dual pair correspondence
Gordan Savin*, University of Utah
(9202230)

Saturday April 12, 1997, 8:00 a.m.10:50 a.m.
Special Session on Groupoids and their Applications, I
Room 0106, Mathematics Building
Organizers:
Alan T. Paterson, University of Mississippi mmap@olemiss.edu

8:00 a.m.
The Brauer Group of a Locally Compact Groupoid
Alexander Kumjian, University of Nevada
Paul S. Muhly, University of Iowa
Jean N. Renault,
Dana P. Williams*, Dartmouth College
(9204605)

8:30 a.m.
Crossed products of graph $C^*$algebras
David A Pask*, The University of Newcastle, Australia
Alex Kumjian, University of Nevada
(9204619)

9:00 a.m.
Entropy estimates for some $C^{*}$endomorphisms
Valentin Deaconu*, University of Nevada
(9204691)

9:30 a.m.
Duality for Groupoids, I
Karla J Oty*, SE Okla State Univ
Arlan B Ramsay, University of Colorado
(9202282)

10:00 a.m.
Duality for Groupoids, II
Arlan B Ramsay*, Univ of Colorado
Karla J Oty, SE Okla St University
(9202283)

10:30 a.m.
Automorphisms of Fredholm modules over transformation group C*algebras
Efton Park*, Texas Christian University
(9204622)

Saturday April 12, 1997, 8:00 a.m.10:50 a.m.
Special Session on Knot Theory and 3Manifolds, I
Room B0421, Mathematics Building
Organizers:
Jozef H. Przytycki, George Washington University przytyck@math.gwu.edu
Yongwu Rong, George Washington University rong@math.gwu.edu

8:00 a.m.
The Conway Polynomial, KTheory, and Variations of the Pass Move.
Fred Hickling*, University of Central Arkansas
(9205715)

8:30 a.m.
Finite Index Subgroups and Knots
Daniel S. Silver*, University of South Alabama
Susan G. Williams, University of South Alabama
(92057224)

9:00 a.m.
Lattices and Skein Modules
Charles D. Frohman*,
Doug Bullock,
Joanna KaniaBartoszynska,
(92057132)

9:30 a.m.
Burau Representation and Random Walks on String Links
XiaoSong Lin*, University of California, Riverside
Feng Tian, University of California, San Diego
Zhenghan Wang, Indiana University
(92057251)

10:00 a.m.
New Developments in The Theory of Skein Modules
Adam S. Sikora*, The George Washington University
(92057267)

10:30 a.m.
Skein Homology
Doug Bullock*, Boise State University
(92057275)

Saturday April 12, 1997, 8:30 a.m.10:50 a.m.
Special Session on Numerical Solution of Differential Equations, I
Room B0425, Mathematics Building
Organizers:
Ricardo H. Nochetto, University of Maryland rhn@math.umd.edu
John E. Osborn, University of Maryland jeo@math.umd.edu

8:30 a.m.
Adaptive finite elements in 3D and the binary black hole initial data problem
Douglas N Arnold*, Penn State
(92065166)

9:00 a.m.
Naive a posteriori estimates for nonlinear parabolic equations
Bernardo Cockburn*,
(92065254)

9:30 a.m.
Preconditioning for the SteadyState NavierStokes Equations withLow Viscosity
Howard C. Elman*, University of Maryland
(9206566)

10:00 a.m.
Estimating the error of numerical solutions of nonlinearreactiondiffusion equations
Donald J. Estep*, Georgia Institute of Technology
(92065191)

10:30 a.m.
Preconditioning Mixed and Least Squares Finite Element Methods
Douglas N Arnold, Penn State University
Richard S Falk*, Rutgers University
Ragnar Winther, University of Oslo, Norway
(92065195)

Saturday April 12, 1997, 8:30 a.m.10:50 a.m.
Special Session on Harmonic Analysis and Applications, I
Room 0303, Mathematics Building
Organizers:
Stephen D. Casey, American University scasey@american.edu
David F. Walnut, George Mason University dwalnut@gmu.edu

8:30 a.m.
Solution of boundary value problems via sampling theory
P. A. McCoy*, U.S. Naval Academy
(9204256)

9:00 a.m.
Pseudodifferential operators with homogeneous symbols
Loukas Grafakos, University of Missouri
Rodolfo H. Torres*, University of Kansas
(9204246)

9:30 a.m.
Spectral criteria, SLLNS and a.s. convergence of singular averagesfor unitary groups.
C. Houdr\'e*, Georgia Institute of Technology
(9204247)

10:00 a.m.
Exacte iterative reconstruction algorithm for multivariate irregularly sampled functions in splinelike spaces: The $L_p$Theory
Akram Aldroubi*, NIH
Hans Feichtinger, NUHAG, Vienna, Austria
(92043211)

10:30 a.m.
Multichannel sampling for nonbandlimited functions: stability andperformance
Michael Unser*, National Institutes of Health, Bethesda, MD
(92041215)

Saturday April 12, 1997, 9:00 a.m.10:50 a.m.
Special Session on Algorithms in Real Algebraic Geometry, I
Room 0101, Mathematics Building
Organizers:
Richard Pollack, Courant Institute of Mathematical Sciences, New York University pollack@geometry.nyu.edu
MarieFrancoise Roy, University of Rennes I, France costeroy@univrennes1.fr

9:00 a.m.
Combinatorial patchworking of real algebraic varieties
Ilia Itenberg*, Institut de Recherche Math\'ematique de Rennes, France
(9201490)

9:30 a.m.
Is regularity of the triangulation necessary in Viro's method?
Jesus Antonio de Loera*, School of Mathematics and The Geometry Center
(92014111)

10:00 a.m.
Combinatorics of smoothing of the singularities of the sequences A. D, and J.
Anatoly Korchagin*, Administrators For the Professions, Inc., NY
(9201465)

10:30 a.m.
Relations between numerical characteristics of dual real varieties
Oleg Y. Viro*, University of California, Riverside
(92014259)

Saturday April 12, 1997, 9:00 a.m.10:50 a.m.
Special Session on Symplectic Geometry, Moduli Spaces and Integrable Systems, I
Room 0306, Mathematics Building
Organizers:
Lisa Claire Jeffrey, McGill University and Institute for Advanced Study jeffrey@math.mcGill.ca
Eyal Markman, University of Massachusetts, Amherst markman@math.umass.edu

9:00 a.m.
Equivariant Holomorphic Morse Theory
Siye Wu*, Institute for Advanced Study
(92053237)

9:30 a.m.
Components of $Hom(\pi_1, PGL(2,R))$
Eugene Z. Xia*, University of Maryland at College Park
(9201407)

10:00 a.m.
A Rigorous Definition of Fiberwise Quantum Cohomology and Equivariant QuantumCohomology.
Peng Lu*, University of Minnesota
(9205863)

10:30 a.m.
Gromov Invariants and Symplectic Dynamics
Eleny Ionel*, MIT and MSRI
Thomas H. Parker, Michigan State University
(92014271)

Saturday April 12, 1997, 9:00 a.m.10:50 a.m.
Special Session on Topological Dynamics, I
Room B0423, Mathematics Building
Organizers:
Joseph Auslander, University of Maryland jna@math.umd.edu
Kenneth R. Berg, University of Maryland krb@math.umd.edu

9:00 a.m.
Simplicial Dynamical Systems
Ethan Akin*, City College of New York
(9205471)

9:30 a.m.
``Continuous Extension of Cocycles to the Universal Pointed Flow''Prelimiary Report
Douglas P Dokken*, University of St Thomas
(92054143)

10:00 a.m.
The Structural Stability of Topological Cocycles
Kathleen Madden*, Lafayette College
Nelson Markley, University of Maryland
(92099134)

10:30 a.m.
Transitivity In Topological Dynamics
Annalisa Crannell*, Franklin & Marshall College
(9205437)

Saturday April 12, 1997, 9:00 a.m.10:50 a.m.
Special Session on Automorphism Groups of Geometric Structures, I
Room 0201, Mathematics Building
Organizers:
Alessandra Iozzi, University of Maryland iozzi@math.umd.edu
Garrett James Stuck, University of Maryland gns@math.umd.edu

9:00 a.m.
Classification of Group Actions on Hyperelliptic Riemann Surfaces of Genus $\geq 2$.
Anthony Weaver*, The Graduate School and University Center, CUNY
(9205139)

9:30 a.m.
Superrigid subgroups of solvable Lie groups
Dave Witte*, Oklahoma State University
(9202258)

10:00 a.m.
The decomposition of real projective $n$manifolds and the classification of radiant affine $3$manifolds.
Suhyoung Choi*, Seoul National University, Korea
(9205162)

10:30 a.m.
The ArithmeticGeometric Invariants of Symmetry
Ravi S. Kulkarni*, City University of New York, Queen's College
(9202264)

Saturday April 12, 1997, 9:00 a.m.10:50 a.m.
Special Session on Partial Differential Equations, I
Room 0302, Mathematics Building
Organizers:
Jonathan Adam Poritz, University of Maryland kaleb@math.umd.edu

9:00 a.m.
Harmonic functions on manifolds
William P. Minicozzi, II*, Johns Hopkins University
Tobias H. Colding, Courant Institute, New York University
(9205874)

9:30 a.m.
Symmetry and Multiple Eigenvalues for Laplacians
Robert B. Lockhart*, USNA
(92035163)

10:00 a.m.
Algebraic treatment of the CauchyFueter and related systems
Daniele Struppa*, George Mason University
(92035286)

10:30 a.m.
Regular functions of biquaternionic variables and applications to mathematical physics
Irene Marie Sabadini*, Dipartimento di Matematica, Milano, Italy
(92035289)

Saturday April 12, 1997, 9:30 a.m.10:50 a.m.
Special Session on Hyperbolic Equations, I
Room 0411, Mathematics Building
Organizers:
Manoussos Grillakis, University of Maryland
Matei Machedon, University of Maryland mxm@math.umd.edu

9:00 a.m.
Supersonic perturbed conic flow
Zhenwen Geng*, West Virginia University
(92035285)

9:30 a.m.
uniqueness of generalized solutions to nonlinear wave equations
Yi Zhou*, Institute for Advanced Study and Fudan University
(92035234)

10:00 a.m.
On Strichartz estimates and semilinear hyperbolic equations
Daniel I. Tataru*, Princeton University
(9203572)

10:30 a.m.
Instability of Symmetric Vortices in GinzburgLandau Theory
L. Almeida,
B. Bethuel,
Y. Guo*, Princeton University and Brown University
(92035204)

Saturday April 12, 1997, 11:00 a.m.11:50 a.m.
Invited Address
Algorithms in real algebraic geometetry
Room 1412, Physics Building
Richard Pollack*, Courant Institute, New York University
(9201479)

Saturday April 12, 1997, 1:30 p.m.2:20 p.m.
Invited Address
Moduli spaces of flat connections on Riemann surfaces
Room 1412, Physics Building
Lisa Claire Jeffrey*, McGill University
(9205843)

Saturday April 12, 1997, 2:30 p.m.4:20 p.m.
Special Session on Algorithms in Real Algebraic Geometry, II
Room 0101, Mathematics Building
Organizers:
Richard Pollack, Courant Institute of Mathematical Sciences, New York University pollack@geometry.nyu.edu
MarieFrancoise Roy, University of Rennes I, France costeroy@univrennes1.fr

2:30 p.m.
Complexity of sign determination of remainder sequences
Thomas Michael Lickteig, Institut fuer Informatik, Bonn, Germany
MarieFrancoise Roy*, Universit\'e de Rennes I, France
(9201469)

3:00 p.m.
Real Root Counting in NearQuadratic Time
J. Maurice Rojas*, MIT
(9201445)

3:30 p.m.
A Numerical Schubert Calculus
Birkett Huber, Department of Mathematics Texas A\&M University
Frank Sottile*, Mathematical Sciences Research Institute and The University of Toronto
Bernd Sturmfels, Department of Mathematics, University of California, Berkeley
(92014202)

4:00 p.m.
Algorithms for expressing forms as a sum of linear powers of forms.
Bruce Reznick*, University of Illinois at UrbanaChampaign
(92014203)

Saturday April 12, 1997, 2:30 p.m.5:50 p.m.
Special Session on Symplectic Geometry, Moduli Spaces and Integrable Systems, II
Room 0306, Mathematics Building
Organizers:
Lisa Claire Jeffrey, McGill University and Institute for Advanced Study jeffrey@math.mcGill.ca
Eyal Markman, University of Massachusetts, Amherst markman@math.umass.edu

2:30 p.m.
Genus zero moduli space as ``difference" of toric varieties
Allen Knutson*, Brandeis University
JeanClaude Hausmann, University of Geneva
(92014197)

3:00 p.m.
Moduli Spaces of Flat Bundles and Matrix pTuples
Philip A Foth*, Penn State University
(9201410)

3:30 p.m.
Rationality of moduli spaces of vector bundles over smooth curves
Hans U. Boden*, Mcmaster University
Koji Yokogawa, Osaka University, Japan
(9201425)

4:00 p.m.
A symplectic approach to Verlinde factorization
Eckhard Meinrenken*, Massachusetts Institute of Technology
(92053145)

4:30 p.m.
Symplectic Geometry and Fusion
Chris Woodward*, Harvard University
(92053169)

5:00 p.m.
The Verlinde algbera of a compact group
Sharad Agnihotri*, University of Texas at Austin
(92014168)

5:30 p.m.
Universal Vassiliev invariants and quantization of the moduli space of flat connections on a Riemann surface
Jorgen Andersen, Aarhus University, Denmark
Josef Mattes*, University of California, Davis
Nicolai Reshetikhin, University of California, Berkeley
(9205814)

Saturday April 12, 1997, 2:30 p.m.4:50 p.m.
Special Session on Lie Groups and Automorphic Forms, II
Room 0407, Mathematics Building
Organizers:
Jianshu Li, University of Maryland jianshu@uxmail.ust.hk
Gordan Savin, University of Utah

2:30 p.m.
Dual pair correspondences of the minimal representations of real exceptional Lie groups of real rank 4.
Hung Yean Loke*, Harvard University
(92022110)

3:00 p.m.
Germs of characters
Fiona Murnaghan*, University of Toronto
(92022146)

3:30 p.m.
Bessel distributions and Waldspurger correspondence
Moshe Baruch, Ohio State University
Zhengyu Mao*, Ohio State University
(9201159)

4:00 p.m.
Linear Cycle Spaces
Joseph A. Wolf*, University of California at Berkeley
(92022107)

4:30 p.m.
Relations between certain power sums of elliptic modular forms in characteristic two
Antonia Wilson Bluher*, National Security Agency, Fort George G. Meade, Maryland
(92011281)

Saturday April 12, 1997, 2:30 p.m.5:15 p.m.
Special Session on Analysis of Spatial Stochastic Models
Room 0102, Mathematics Building
Organizers:
A. M. Kagan, University of Maryland amk@math.umd.edu
Eric V. Slud, University of Maryland evs@math.umd.edu

2:30 p.m.
Wavelet thresholding for non (necessarily) Gaussian noise.
C. Houdr\'e*, Georgia Institute of Technology
(9206248)

3:10 p.m.
Spatial Statistics and Functional Brain Imaging
Lawrence A Shepp*, Columbia University
(92062255)

3:50 p.m.
Improving Climate Prediction Using Seasonal SpaceTime Models
XuFeng Niu, Florida State University
Ian McKeague*, Florida State University
James Elsner, Florida State University
(92062117)

4:30 p.m.
Prediction in Binary Random Fields
Victor De Oliveira*, University of Maryland
(9206240)

5:00 p.m.
Questions and Discussion

Saturday April 12, 1997, 2:30 p.m.4:50 p.m.
Special Session on Groupoids and their Applications, II
Room 0106, Mathematics Building
Organizers:
Alan T. Paterson, University of Mississippi mmap@olemiss.edu

2:30 p.m.
Differential Geometry ``up to homotopy''
Alan D. Weinstein*, University of California, Berkeley
(9205384)

3:00 p.m.
Pseudodifferential operators on groupoids
Victor Nistor*, Pennsylvania State University
Alan Weinstein, University of California, Berkeley
Ping Xu, Pennsylvania State University
(9205853)

3:30 p.m.
Gerstenhaber algebras and Lie algebroids
Ping Xu*, Penn State University, University Park
(9205833)

4:00 p.m.
Lie algebroids, Lie bialgebroids, and homological fields
Arkady Vaintrob*, New Mexico State University and Brigham Young University
(9205886)

4:30 p.m.
$C^{*}$actions of groupoids and inverse semigroups
John Quigg*, Arizona State University
N\'andor Sieben, Arizona State University
(9204680)

Saturday April 12, 1997, 2:30 p.m.5:50 p.m.
Special Session on Knot Theory and 3Manifolds, II
Room B0421, Mathematics Building
Organizers:
Jozef H. Przytycki, George Washington University przytyck@math.gwu.edu
Yongwu Rong, George Washington University rong@math.gwu.edu

2:30 p.m.
MelvinMorton expansion of the Jones polynomialand universal weight systems
Arkady Vaintrob*, New Mexico State University and Brigham Young University
(9205789)

3:00 p.m.
On Vassiliev invariants coming from cablings of link polynomials.
Michael McDaniel*, The George Washington University
Yongwu Rong, The George Washington University
(92057209)

3:30 p.m.
Regular homotopy and Vassiliev invariants of generic immersions $S^k\to R^{2k1}$, $k\ge 6$
Tobias Ekholm*, Uppsala University, Sweden
(92057239)

4:00 p.m.
Homology Spheres with the same finite type invariants of bounded orders
Efstratia Kalfagianni*, Rutgers University, New Brunswick
(92057199)

4:30 p.m.
Quantum invariants and periodicity of 3manifolds.
Joanna KaniaBartoszynska*, Boise State University
(92057223)

5:00 p.m.
Automorphisms of the Complex of Curves
Feng Luo*, Rutgers University, New Brunswick
(9205793)

5:30 p.m.
Closed Incompressible Surfaces in Knot and Link Complements
Elizabeth Finkelstein*, Hunter College (CUNY)
Yoav Moriah, Technion  Israel Institute of Technology
(92057276)

Saturday April 12, 1997, 2:30 p.m.4:20 p.m.
Special Session on Topological Dynamics, II
Room B0423, Mathematics Building
Organizers:
Joseph Auslander, University of Maryland jna@math.umd.edu
Kenneth R. Berg, University of Maryland krb@math.umd.edu

2:30 p.m.
Graph Substitutions
Joseph P. Previte*, University of Maryland
(9205778)

3:00 p.m.
$T,T^{1}$ is not standard
Deborah W Heicklen*, University of Maryland
(92028122)

3:30 p.m.
A double return times theorem
Idris Assani*, University of North Carolina, Chapel Hill
(92028108)

4:00 p.m.
Finite Precision Representation of Attractors and their InvariantMeasures
Fern Y. Hunt*, National Institute of Standards and Technology
(9205899)

Saturday April 12, 1997, 2:30 p.m.5:20 p.m.
Special Session on Automorphism Groups of Geometric Structures, II
Room 0201, Mathematics Building
Organizers:
Alessandra Iozzi, University of Maryland iozzi@math.umd.edu
Garrett James Stuck, University of Maryland gns@math.umd.edu

2:30 p.m.
On the dynamics of pseudoAnosov homeomorphisms on representation varieties of surface groups
Michael Kapovich*,
(92053116)

3:00 p.m.
Growth rate of trajectories of flows on homogeneous spaces
Dmitry Y Kleinbock*, Institute for Advanced Study
Gregory A Margulis, Yale University
(92058187)

3:30 p.m.
Geodesic foliations and Lorentz dynamics
Abdelghani Zeghib*, Ecole Normale Superieure de Lyo, Lyon, France
(92058133)

4:00 p.m.
Curvature obstructions for compact Hermitian manifolds
Luis HernandezLamoneda*, CIMAT, Guanajuato, Mexico
(92053148)

4:30 p.m.
Topological Superrigidity and Applications
Renato Feres*, Washington University
Francois Labourie, Universite ParisSud, Orsay
(92058158)

5:00 p.m.
Isometry Groups of Compact Hyperlorentz Manifolds
Brett A Sovereign*, University of Maryland College Park
(9205329)

Saturday April 12, 1997, 2:30 p.m.5:20 p.m.
Special Session on Partial Differential Equations, II
Room 0302, Mathematics Building
Organizers:
Jonathan Adam Poritz, University of Maryland kaleb@math.umd.edu

2:30 p.m.
A new framework for studying geometric interface evolution problems.
Sergio A. Alvarez*, Carnegie Mellon University
Robert L. Pego, University of Maryland
(92035127)

3:00 p.m.
Solvability of superdiffusive nonlinear parabolic problems
Panagiota Daskalopoulos*, University of California, Irvine
Manuel del Pino,
(92053283)

3:30 p.m.
Polynomial bound for the $H^s$ norms of solutions for Schrodinger equations
Gigliola Staffilani*, Stanford University
(92035194)

4:00 p.m.
Regularizing Effects for Integrodifferential Equations
Hans P. Engler*, Georgetown University
(92045196)

4:30 p.m.
The existence of discrete shock profiles for a class of monotonicitypreserving schemes for conservation laws
Haitao Fan*, Georgetown University
(92035287)

5:00 p.m.
On the Differential System Governing Flows in Magnetic Field with Data in $L^p$
Fengxin Chen, Brigham Young University
Ping Wang*, Penn State University
(9203520)

Saturday April 12, 1997, 2:30 p.m.4:50 p.m.
Special Session on Numerical Solution of Differential Equations, II
Room B0425, Mathematics Building
Organizers:
Ricardo H. Nochetto, University of Maryland rhn@math.umd.edu
John E. Osborn, University of Maryland jeo@math.umd.edu

2:30 p.m.
Numerical simulation and analysis of shear band formation
Donald A. French*, University of Cincinnati
(92065292)

3:00 p.m.
Godunovlike schemes for general systems of conservation laws
Harland Glaz*, University of Maryland, College Park
(92076250)

3:30 p.m.
Anisotropic Adaptation in Finite Elements
Jonathan B Goodman*, Courant Institute, New York University
(92065210)

4:00 p.m.
Optimal approximability of solutions of singularly perturbed differential equations
R. Bruce Kellogg*, University of Maryland, College Park
Martin Stynes, University College, Cork, Ireland
(92065296)

4:30 p.m.
Quadraturefree Implementation of Discontinuous Galerkin Method
ChiWang Shu*, Division of Applied Mathematics, Brown University
(9206550)

Saturday April 12, 1997, 2:30 p.m.5:50 p.m.
Special Session on Harmonic Analysis and Applications, II
Room 0303, Mathematics Building
Organizers:
Stephen D. Casey, American University scasey@american.edu
David F. Walnut, George Mason University dwalnut@gmu.edu

2:30 p.m.
A Fundamental Principle for Hyperfunctions Solutions of Systems of Infinite Order Differential Equations
Daniele Struppa*, George Mason University
(92035291)

3:00 p.m.
Perturbations of the ndimensional Haar wavelet.
Richard A. Zalik*, Auburn University
(92042212)

3:30 p.m.
Haar Multiwavelets in $R^n$
Yang Wang*, Georgia Institute of Technology
(92042269)

4:00 p.m.
Timefrequency localization frames
Joseph D. Lakey*, New Mexico State University, Las Cruces
(92042136)

4:30 p.m.
Singular Values of Compact Pseudodifferential Operators
Christopher Heil*, Georgia Institute of Technology
(92042189)

5:00 p.m.
Wiener's lemma and Gabor frames
Karlheinz F Gr\"ochenig*, University of Connecticut
(92042284)

5:30 p.m.
On Pseudo Frames
Shidong Li*, San Francisco State University
Hidemitsu Ogawa, Tokyo Institute of Technology
(92042149)

Saturday April 12, 1997, 3:30 p.m.4:50 p.m.
Special Session on Hyperbolic Equations, II
Room 0411, Mathematics Building
Organizers:
Manoussos Grillakis, University of Maryland
Matei Machedon, University of Maryland mxm@math.umd.edu

3:30 p.m.
Hyperbolic estimates for Schr\"odinger equations
Lev Kapitanski*, Kansas State University
(92035192)

4:00 p.m.
Wellposedness in Sobolev spaces of the full water wave problem in 2D and 3D
Sijue Wu*, University of Iowa
(92035139)

4:30 p.m.
On the motion of the free surface of liquid
Hans Lindblad*, University of California, San Diego
Demetri Christoudoulu, Princeton University
(92035295)

Saturday April 12, 1997, 7:00 p.m.11:00 p.m.
Council
Ballroom A, Holiday Inn College Park
Sunday April 13, 1997

Sunday April 13, 1997, 7:30 a.m.12:00 p.m.
Registration
Rotunda, Mathematics Building

Sunday April 13, 1997, 7:30 a.m.4:00 p.m.
Exhibit and Book Sale
Rotunda, Mathematics Building

Sunday April 13, 1997, 8:00 a.m.10:50 a.m.
Special Session on Lie Groups and Automorphic Forms, III
Room 0407, Mathematics Building
Organizers:
Jianshu Li, University of Maryland jianshu@uxmail.ust.hk
Gordan Savin, University of Utah

8:00 a.m.
On the unitary dual of real semisimple Lie groups and the $A_{\germ q} (\lambda)$ modules. The regular Case.
Susana Alicia SalamancaRiba*, New Mexico State University. Las Cruces, NM 88003
(92022151)

8:30 a.m.
Kazhdan/Patterson Lifting for $GL(n,\Bbb R)$
JingSong Huang*, HKUST
Jeffrey Adams, University of Maryland
(9202242)

9:00 a.m.
A new proof of the duality theorem of Hecht, Mili\v ci\'c, Schmid and Wolf
Dragan Mili\v ci\'c*, University of Utah
Pavle Pand\v zi\'c, Massachusetts Institute of Technology
(92022247)

9:30 a.m.
Classifying unitary representations
David A. Vogan, Jr.*, Massachusetts Institute of Technology
Susana A. SalamancaRiba, New Mexico State University
(92022106)

10:00 a.m.
A theta correspondence between automorphic forms related by aquadratic base change
ZeLi Dou*, Texas Christian University
(92011123)

10:30 a.m.
Buiding sets
Allen Moy*, University of Michigan
(92022167)

Sunday April 13, 1997, 8:00 a.m.10:50 a.m.
Special Session on Groupoids and their Applications, III
Room 0106, Mathematics Building
Organizers:
Alan T. Paterson, University of Mississippi mmap@olemiss.edu

8:00 a.m.
Connes' index theorem for smooth groupoids
Jerome Kaminker*, IUPUI
Alan Paterson, University of Mississippi
(9204654)

8:30 a.m.
A Lefschetz Trace Formula for Equivariant Cohomology.
Minhyong Kim*, University of Arizona
(9202255)

9:00 a.m.
$Z_k$manifolds, groupoids and index theory
Carla E Farsi*, Univ of Colorado, Boulder
(92046109)

9:30 a.m.
C*algebras and Ordered Bratteli Diagrams
James A Mingo*, Queen's Univ, Canada
(9204694)

10:00 a.m.
Hecke Algebras and semigroup crossed product algebras
Berndt A Brenken*, Univ of Calgary
(92022103)

10:30 a.m.
Fell Bundles over Equivalence Relations.
Igor Fulman*, University of Iowa
(9204752)

Sunday April 13, 1997, 8:00 a.m.10:50 a.m.
Special Session on Knot Theory and 3Manifolds, III
Room B0421, Mathematics Building
Organizers:
Jozef H. Przytycki, George Washington University przytyck@math.gwu.edu
Yongwu Rong, George Washington University rong@math.gwu.edu

8:00 a.m.
The Tabulation of Knots and Links
Charilaos N. Aneziris*, Deutsches Elektronen Synchrotron
(92054183)

8:30 a.m.
Computing the genus of knots via quantum invariants
Razvan Gelca*, University of Iowa
(9205726)

9:00 a.m.
Virtual knot theory
Louis H. Kauffman*, University of Illinois at Chicago
(9205757)

9:30 a.m.
Holomorphic Invariants of 3manifolds and $q$gamma Functions
Ruth Lawrence*, Univeristy of Michigan
(92057231)

10:00 a.m.
Topological quantum $gl(1\vert 1)$invariants
Oleg Y. Viro*, University of California, Riverside
(92057244)

10:30 a.m.
The ReshetikhinTuraev Invariant of NonSimply Connected Groups
Stephen F Sawin*, Fairfield University
(92057245)

Sunday April 13, 1997, 8:00 a.m.10:50 a.m.
Special Session on Harmonic Analysis and Applications, III
Room 0303, Mathematics Building
Organizers:
Stephen D. Casey, American University scasey@american.edu
David F. Walnut, George Mason University dwalnut@gmu.edu

8:00 a.m.
Schiffer Problem and Isoparametric Hypersurfaces.
Carlos A. Berenstein, University of Maryland at College Park
Vladimir E. Shklover*, University of Maryland at College Park
(92035112)

8:30 a.m.
Exponetial Sums and Phased Arrays
George Benke*, Georgetown University
(92042246)

9:00 a.m.
Existence and characterization of nonrecursive inverses for rational filter banks
Christopher M. Brislawn*, Los Alamos National Laboratory
(9209323)

9:30 a.m.
A regularization method with error estimates for bandlimited signalextrapolation.
M. Zuhair Nashed*, University of Delaware
XiangGen Xia, University of Delaware
(92041282)

10:00 a.m.
Spline type summability methods for sampling theory
W. R. Madych*, University of Connecticut
(92042248)

10:30 a.m.
The Application of Local Cosine Transforms to Very High Speed Modems
Peter Niels Heller*, Aware, Inc. Bedford, Massachusetts
(92094236)

Sunday April 13, 1997, 8:30 a.m.10:50 a.m.
Special Session on Symplectic Geometry, Moduli Spaces and Integrable Systems, III
Room 0306, Mathematics Building
Organizers:
Lisa Claire Jeffrey, McGill University and Institute for Advanced Study jeffrey@math.mcGill.ca
Eyal Markman, University of Massachusetts, Amherst markman@math.umass.edu

8:30 a.m.
Langlands conjecture and geometric realization of Whittaker functions
Edward Frenkel*, Harvard University
(92014165)

9:00 a.m.
Integrable systems and algebraic surfaces
Jacques C. Hurtubise*, McGill University
(92058113)

9:30 a.m.
Prym integrable systems
Jacques Hurtubise, McGill University
Eyal Markman*, University of Massachusetts, Amherst
(92014142)

10:00 a.m.
Heisenberg action and the Hitchin system.
Bert van Geemen, Universit\`a di Torino, Italy
Emma Previato*, Boston University
(92014140)

10:30 a.m.
Principal bundles on elliptic fibrations
Ron Y. Donagi*, Institute for Advanced Study On leave from: University of Pennsylvania
(92014193)

Sunday April 13, 1997, 8:30 a.m.10:20 a.m.
Special Session on Numerical Solution of Differential Equations, III
Room B0425, Mathematics Building
Organizers:
Ricardo H. Nochetto, University of Maryland rhn@math.umd.edu
John E. Osborn, University of Maryland jeo@math.umd.edu

8:30 a.m.
Optimal $hp$ convergence over partitioned domains
Padmanabhan Seshaiyer, University of Maryland Baltimore County
Manil Suri*, University of Maryland Baltimore County
(9206598)

9:00 a.m.
Exact and Computed Solutions to Constrained Total Variation Minimization Problems
Joel C. W. Rogers, Polytechnic University
William G. Szymczak*, Naval Research Laboratory
(92065182)

9:30 a.m.
Wavelet boundary element methods for 3D problems
Tobias von Petersdorff*, University of Maryland
(92065293)

10:00 a.m.
A monotone finite scheme for convection diffusion equations
Jinchao Xu*, Pennsylvania State University
(92065273)

Sunday April 13, 1997, 9:00 a.m.10:50 a.m.
Special Session on Algorithms in Real Algebraic Geometry, III
Room 0101, Mathematics Building
Organizers:
Richard Pollack, Courant Institute of Mathematical Sciences, New York University pollack@geometry.nyu.edu
MarieFrancoise Roy, University of Rennes I, France costeroy@univrennes1.fr

9:00 a.m.
{\bf Nearly sharp parallel complexity bounds for testing arrangements and polyhedra}
Dima Grigoriev*, Penn State University
(9206806)

9:30 a.m.
{\bf {VC}dimension and semialgebraic sets}
Herv{\'e} Br{\"o}nnimann*, INRIA SophiaAntipolis
(92068152)

10:00 a.m.
Adjunction inequality for real algebraic curves
Grisha Mikhalkin*, MSRI, Berkeley
(9201424)

10:30 a.m.
Multiplicity of a zero of an analytic function on a trajectory of a vector field
Andrei Gabrielov*, Purdue University
(9201495)

Sunday April 13, 1997, 9:00 a.m.10:50 a.m.
Special Session on Nonlinear Waves and Stability in Weakly Dissipative Systems, I
Room 0107, Mathematics Building
Organizers:
Robert L. Pego, University of Maryland rlp@math.umd.edu

9:00 a.m.
Invariant manifolds for a class of dispersive, Hamiltonian, partial differential equations
ClaudeAlain Pillet, Universit\'e de Gen\'eve, Switzerland
Clarence E Wayne*, The Pennsylvania State University
(9203596)

9:40 a.m.
Timedependent resonance theory
Avy Soffer, Rutgers University, New Brunswick
Michael I Weinstein*, University of Michigan, Ann Arbor
(92035124)

10:20 a.m.
Resonances, radiation damping and instability in Hamiltonian nonlinear wave equations
Avy Soffer*, Rutgers University, New Brunswick
Michael I Weinstein, University of Michigan, Ann Arbor
(92035125)

Sunday April 13, 1997, 9:00 a.m.10:50 a.m.
Special Session on Topological Dynamics, III
Room B0423, Mathematics Building
Organizers:
Joseph Auslander, University of Maryland jna@math.umd.edu
Kenneth R. Berg, University of Maryland krb@math.umd.edu

9:00 a.m.
Flux across nonsmooth boundaries
Jenny C. Harrison*, Rockefeller University of New York and University of California, Berkeley
(92028256)

9:30 a.m.
Topological groups with trivial and nontrivial universal minimal flows
Vladimir Pestov*, Victoria University
(92054260)

10:00 a.m.
The Bohr Compactification of a Group Extension
Hugo D. Junghenn*, The George Washington University
Paul Milnes, University of Western Ontario
(92022120)

10:30 a.m.
On linear differential equations and generalized Fourier matrices
Hsin Chu*, Univ. of Maryland
(92034272)

Sunday April 13, 1997, 9:00 a.m.10:50 a.m.
Special Session on Automorphism Groups of Geometric Structures, III
Room 0201, Mathematics Building
Organizers:
Alessandra Iozzi, University of Maryland iozzi@math.umd.edu
Garrett James Stuck, University of Maryland gns@math.umd.edu

9:00 a.m.
Superrigidity for isometric group actions on CAT(1) spaces
Yan Gao*, Yale University
(92022131)

9:30 a.m.
Rigidity and Deformations for Semisimple Lie Group Actions
Elie J. Benveniste*, Stanford University
(92053171)

10:00 a.m.
Isotropy of Semisimple Group Actions on Manifolds with Geometric Structure
John P. Szaro*, University of Michigan
(92053173)

10:30 a.m.
Cocycles over Anosov actions and applications
Viorel Ni\c tic\u a*, Indiana University, Bloomington
Andrew T\"or\"ok, Princeton University
(92058219)

Sunday April 13, 1997, 9:00 a.m.10:50 a.m.
Special Session on Partial Differential Equations, III
Room 0302, Mathematics Building
Organizers:
Jonathan Adam Poritz, University of Maryland kaleb@math.umd.edu

9:00 a.m.
Harmonic and QuasiHarmonic Maps
Changyou Wang*,
FangHua Lin,
(9203592)

9:30 a.m.
Painleve Solutions from YangMills Instantons
Jan Segert*, University of Missouri
(92053157)

10:00 a.m.
Solution of the nonabelian monopole equations and relationsbetween Donaldson and SeibergWitten invariants
Paul M. N. Feehan*, Harvard University
(9205816)

10:30 a.m.
Combinatorial Bochner's method and Ricci curvature
Robin Forman*, Rice University
(92035288)

Sunday April 13, 1997, 9:30 a.m.10:55 a.m.
Session on Contributed Papers
Room 0301, Mathematics Building

9:30 a.m.
Cohomological Quantization Modules for Symplectic Tori
Scott Gregory Chastain*, University of Florida
Paul Lee Robinson, University of Florida
(9205812)

9:45 a.m.
Supercuspidal Representations of $GL(n)$ Distinguished by $U(n)$ or$O(n)$
Jeffrey L Hakim*, American University
Zhengyu Mao, The Ohio State University
(92022101)

10:00 a.m.
Decoding Ddimensional Perfect Maps
Cengizhan Ozturk*, Drexel University
Eric Schmutz, Drexel University
Jonathan Nissanov, Drexel University
(9200517)

10:15 a.m.
The Trace on $SU(2,1)$ and Special Functions Associated to ComplexHyperbolic $2$Space
Hanna M. Sandler*, American University
(92051100)

10:30 a.m.
The Argument Principle for Harmonic Mappings on Punctured Domains
John W Thompson*, author
(9203041)

10:45 a.m.
Pgroups and Canonical coordinates
Boris S. Khots*,
(92022235)

Sunday April 13, 1997, 11:00 a.m.11:50 a.m.
Invited Address
Unipotent representations attached to small nilpotent orbits
Room 1412, Physics Building
JianShu Li*, University of Maryland, College Park
(92022102)

Sunday April 13, 1997, 1:30 p.m.2:20 p.m.
Invited Address
Merits and demerits of the orbit method
Room 1412, Physics Building
Alexandre Kirillov*, University of Pennsylvania
(9200004)

Sunday April 13, 1997, 2:30 p.m.4:20 p.m.
Special Session on Algorithms in Real Algebraic Geometry, IV
Room 0101, Mathematics Building
Organizers:
Richard Pollack, Courant Institute of Mathematical Sciences, New York University pollack@geometry.nyu.edu
MarieFrancoise Roy, University of Rennes I, France costeroy@univrennes1.fr

2:30 p.m.
Systems of real quadratic equations
Alexander Barvinok*, University of Michigan
(9201488)

3:00 p.m.
On bounding the complexity of the connected components of semialgebraic sets.
Saugata Basu*, Mathematical Sciences Research Institute, Berkeley.
Richard Pollack, Courant Institute, New York University
MarieFrancoise Roy, Institut Mathematique, Universite de Rennes. France
(92068227)

3:30 p.m.
Cylindrical Algebraic Decomposition adapted to a set of equalities and global projection operators
Laureano GonzalezVega*, Universidad de Cantabria, Spain
Neila GonzalezCampos, Universidad de Cantabria, Spain
(9201470)

4:00 p.m.
Algorithms for preorders associated with semialgebraic sets.
Victoria Powers*, Emory University
Claus Scheiderer, Universit\"at Regensburg
(92014177)

Sunday April 13, 1997, 2:30 p.m.5:50 p.m.
Special Session on Symplectic Geometry, Moduli Spaces and Integrable Systems,IV
Room 0306, Mathematics Building
Organizers:
Lisa Claire Jeffrey, McGill University and Institute for Advanced Study jeffrey@math.mcGill.ca
Eyal Markman, University of Massachusetts, Amherst markman@math.umass.edu

2:30 p.m.
Geometry of Commuting Differential Operators
Motohico Mulase*, University of California, Davis
(92014172)

3:00 p.m.
Topology of moduli spaces over a quadruplypunctured sphere
William M. Goldman*,
Robert L. Benedetto,
(92057181)

3:30 p.m.
On representation varieties of Artin groups,projective arrangements andthe fundamental groups of smooth complex algebraic varieties.
John J Millson*, University of Maryland
(92014135)

4:00 p.m.
Fox Calculus, Symplectic Geometry, and Moduli Spaces.
Valentino Zocca*, Universite' Paris XI, Orsay, France
(9205331)

4:30 p.m.
Canonical Almost Hermitian Structures of Normal Bundles and Applications to K{\"a}hler forms
PoHsun Hsieh*, University of Maryland, College Park
(9205318)

5:00 p.m.
The dynamics of surface diffeomorphisms on moduli spaces
Richard J. Brown*, University of Maryland, College Park
(92051261)

5:30 p.m.
On a formula of Goresky, Kottwitz, and McPherson
Susan Tolman, Princeton University
Jonathan Weitsman*, University of California, Santa Cruz
(92058274)

Sunday April 13, 1997, 2:30 p.m.4:50 p.m.
Special Session on Lie Groups and Automorphic Forms, IV
Room 0407, Mathematics Building
Organizers:
Jianshu Li, University of Maryland jianshu@uxmail.ust.hk
Gordan Savin, University of Utah

2:30 p.m.
Thetacorrespondences over padic fields
David Manderscheid*, University of Iowa
(9202249)

3:00 p.m.
Generalisations of Ladder Representatons
EngChye Tan,
ChenBo Zhu*, National University of Singapore
(92022115)

3:30 p.m.
Selfdual automorphic forms on the general linear group
Dan Barbasch, Cornell University
Birgit Speh*, Cornell University
(92022130)

4:00 p.m.
Weakly Symmetric Spaces and Bounded Symmetric Domains
Hieu Nguyen*, Rowan College of New Jersey
(9202209)

4:30 p.m.
Berezin transform on line bundles over Hermitian symmetric spaces
Genkai Zhang*, University of Karlstad, Sweden
(9202251)

Sunday April 13, 1997, 2:30 p.m.3:50 p.m.
Special Session on Groupoids and their Applications, IV
Room 0106, Mathematics Building
Organizers:
Alan T. Paterson, University of Mississippi mmap@olemiss.edu

2:30 p.m.
Groupoid approach to quantum groups
Albert J. L. Sheu*, University of Kansas
(9204638)

3:00 p.m.
Groupoids and Quivers in Operator Algebra
Paul S. Muhly*, University of Iowa
(9204667)

3:30 p.m.
Locally compact transversals and dynamics on the unit space ofa groupoid.
Jack Spielberg*, Arizona State University
Ian Putnam, University of Victoria
(9204635)

Sunday April 13, 1997, 2:30 p.m.5:50 p.m.
Special Session on Knot Theory and 3Manifolds, IV
Room B0421, Mathematics Building
Organizers:
Jozef H. Przytycki, George Washington University przytyck@math.gwu.edu
Yongwu Rong, George Washington University rong@math.gwu.edu

2:30 p.m.
Burau Representation of String Links
Xiaosong Lin, UC at Riverside
Feng Tian, UC at San Diego
Zhenghan Wang*, Indiana University at Bloomington
(92057294)

3:00 p.m.
A combinatorial description of knotted surfaces and their isotopies
J. Scott Carter, University of South Alabama
Joachim H. Rieger, Universidade de Sao Paulo, Instituto de Ciencias Matematicas de Sao Car
Masahico Saito*, University of South Florida
(9205721)

3:30 p.m.
Geometry and physics of knots
Andrzej Stasiak*, Universite de Lausanne
(92057220)

4:00 p.m.
Shadows of wave fronts and ArnoldBennequin type invariants of frontson surfaces.
Vladimir V. Tchernov*, University of California, Riverside
(92057174)

4:30 p.m.
Some Properties of the Projections of Knotted Surfaces
J. Scott Carter*, University of South Alabama
Vera Cararra, Universidade de S\'{a}o Paulo, Brasil
Masahico Saito, University of South Florida
(9205728)

5:00 p.m.
SubgroupSeparability of the FigureEight Knot Group
Daniel T Wise*, UC Berkeley
(92057188)

5:30 p.m.
Limits of Hyperbolic 3Manifolds
Timothy D Comar*, St. Louis University
(9205713)

Sunday April 13, 1997, 2:30 p.m.4:20 p.m.
Special Session on Nonlinear Waves and Stability in Weakly Dissipative Systems, II
Room 0107, Mathematics Building
Organizers:
Robert L. Pego, University of Maryland rlp@math.umd.edu

2:30 p.m.
Linear stability of solitary waves with large surface tension
Robert L Pego, University of Maryland, College Park
Robert L Sachs*, George Mason University
(92035184)

3:10 p.m.
Fourier Splitting method for universal decay of nonlocally damped nonlinear waves
Keith Promislow*, Simon Fraser University
(92035216)

3:50 p.m.
Weak travelling wave solutions of a perturbed Boussinesq system.
Yi A. Li*, School of Mathematics, University of Minnesota
(92035228)

Sunday April 13, 1997, 2:30 p.m.3:20 p.m.
Special Session on Topological Dynamics, IV
Room B0423, Mathematics Building
Organizers:
Joseph Auslander, University of Maryland jna@math.umd.edu
Kenneth R. Berg, University of Maryland krb@math.umd.edu

2:30 p.m.
A zeroone law for dynamical properties
Jonathan King*, University of Florida, Gainesville
(92054277)

Sunday April 13, 1997, 2:30 p.m.4:50 p.m.
Special Session on Automorphism Groups of Geometric Structures, IV
Room 0201, Mathematics Building
Organizers:
Alessandra Iozzi, University of Maryland iozzi@math.umd.edu
Garrett James Stuck, University of Maryland gns@math.umd.edu

2:30 p.m.
Geometry of Crooked Planes
Todd A. Drumm*, Swarthmore College
William M. Goldman, University of Maryland
(92051201)

3:00 p.m.
Invariant measures and orbit closures on homogeneous spaces foractions of subgroups generated by unipotent elements
Nimish A Shah*, Institute for Advanced Studies, Princeton and Tata Institute of
(92022205)

3:30 p.m.
Topological Equivalence of Flows on Solvmanivolds
Diego M Benardete*, University of Hartford
S. G Dani, Tata Institute
(92058214)

4:00 p.m.
Compact CliffordKlein forms of homogeneous manifolds
Toshiyuki Kobayashi*, Mathematical Sciences, University of Tokyo
(92022164)

4:30 p.m.
Local rigidity of higher rank lattice actions
Nantian Qian*, Yale University
(92058179)

Sunday April 13, 1997, 2:30 p.m.4:20 p.m.
Special Session on Partial Differential Equations, IV
Room 0302, Mathematics Building
Organizers:
Jonathan Adam Poritz, University of Maryland kaleb@math.umd.edu

2:30 p.m.
The $1/H$ flow and the HawkingPenrose Conjecture
Tom Ilmanen*, Northwestern University
Gerhard Huisken, University of Tuebingen, Germany
(9203575)

3:00 p.m.
Natural Geometric Structures for CMC and CSC Moduli Spaces
Rob Kusner*, Institute for Advanced Study
(9205381)

3:30 p.m.
Triunduloids: Embedded CMC Surfaces with Three Ends
John M Sullivan*, Univ of Minnesota
(92053121)

4:00 p.m.
Mean Curvature Data and the Shape of a Surface
Georgi I Kamberov*, University of Massachusetts at Amherst
(92053176)

Sunday April 13, 1997, 2:30 p.m.5:50 p.m.
Special Session on Harmonic Analysis and Applications, IV
Room 0303, Mathematics Building
Organizers:
Stephen D. Casey, American University scasey@american.edu
David F. Walnut, George Mason University dwalnut@gmu.edu

2:30 p.m.
Rearrangements of Functions andIntegrability of the Fourier Transform.
Archil Gulisashvili*, Ohio University
(92042138)

3:00 p.m.
Focused Wideband Maximum Likelihood and Spatial Spectrum Estimation
Brian M. Sadler*, Army Research Laboratory
(92060213)

3:30 p.m.
Parameter estimation for noisy polynomial phase signals
Ananthram Swami*, Army Research Lab., Adelphi, Maryland
(92060207)

4:00 p.m.
Number Theoretic Methods in Period Estimation from SparseNoisy Data
Stephen D. Casey*, American University
(92042147)

4:30 p.m.
Coping with Complex Boundaries
Jack F. Douglas*,
(92042242)

5:00 p.m.
Generalized Binomial Expansion on Complex Matrix Space
Hongming Ding*, St. Louis University
(92043190)

5:30 p.m.
Sampling on unions of lattices and applications
David F Walnut*, George Mason University
(92042154)
Inquiries: meet@ams.org