
AMS Sectional Meeting Program by Day
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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
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

