AMS Sectional Meeting Program by Day
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1995 Fall Eastern Sectional Meeting
Boston, MA, October 78, 1995
Meeting #903
Associate secretaries:
Lesley M Sibner, AMS
lsibner@duke.poly.edu
Saturday October 7, 1995

Saturday October 7, 1995, 8:30 a.m.10:50 a.m.
Special Session on Graph Theory, I
Room 333, Student Center
Organizers:
Karen L. Collins, Wesleyan University
Ruth Haas, Smith College

8:30 a.m.
Graphs of small dimension.
Nancy Eaton*, University of Rhode Island
V. Rodl, Emory University
(90305193)

9:00 a.m.
On small edgecuts of uniquely edge$3$colorable cubic graphs.
CunQuan Zhang*, West Virginia University
(9030525)

9:30 a.m.
Edge chromatics difference sequences for cubic graphs.
Michael O. Albertson, Smith College
Ruth Haas*, Smith College
(90305136)

10:00 a.m.
On the ultimate independence ratio of graphs.
Gena Hahn*, University of Montreal
Pavol Hell, Simon Fraser University
Svatopluk Poljak, Charles University, Prague, Czech Republic
(9030595)

10:30 a.m.
Kneser graphs.
Claude H. Tardif*, University of Montreal
(9030594)

Saturday October 7, 1995, 8:30 a.m.10:50 a.m.
Special Session on Geometry of 3manifolds, I
Room 342, Student Center
Organizers:
William Dart Dunbar, Jr., Simon's Rock of Bard College
Robert Meyerhoff, Boston College
Jeffrey R. Weeks, Canton, New York

8:30 a.m.
Flat $3$manifolds as boundaries of hyperbolic $4$manifolds.
Barbara E. Nimershiem*, Franklin & Marshall College
(90351244)

9:00 a.m.
Hyperbolic $3$manifolds with no selfintersecting closed geodesics.
Ara S. Basmajian*, University of Oklahoma
Scott A. Wolpert, University of Oklahoma
(90351219)

9:30 a.m.
Representations of twobridge knot groups on twobridge knot groups sending meridian to meridian and longitude to chosen odd power of longitude.
Robert F. Riley*, State University of New York, Binghamton
Tomotada Ohtsuki, University of Tokyo, Japan
(90357243)

10:00 a.m.
$3$Manifolds with embedded least area laminations of Euler characteristic zero.
Lee D. Mosher*, Rutgers University, Newark
Ulrich Oertel, Rutgers University, Newark
(9035790)

10:30 a.m.
Groups acting on real trees.
Mark E. Feighn*, Rutgers University, Newark
(90355165)

Saturday October 7, 1995, 8:30 a.m.10:50 a.m.
Special Session on Ergodic Theory, I
Room 433, Student Center
Organizers:
Stanley J. Eigen, Northeastern University
Vidhu S. Prasad, University of Massachusetts, Lowell

8:30 a.m.
Dynamics of Markov groups.
Bruce P. Kitchens*, IBM T. J. Watson Research Center, Yorktown Heights, New York
(90328163)

9:00 a.m.
Topological conjugacy of endomorphisms of the $2$torus.
Roy L. Adler*, IBM T. J. Watson Research Center, Yorktown Heights, New York
Charles Tresser, IBM T. J. Watson Research Center, Yorktown Heights, New York
Patrick A. Worfolk, IBM T. J. Watson Research Center, Yorktown Heights, New York
(9032862)

9:30 a.m.
Characterizing mildly mixing actions using ratio sets and orbit equivalence.
Jane M. Hawkins*, University of North Carolina, Chapel Hill
Cesar E. Silva, Williams College
(9032860)

10:00 a.m.
Loosely Bernoulli in $Z^d$.
Aimee S. A. Johnson*, Swarthmore College
Ayse Arzu Sahin, North Dakota State University
(9032819)

10:30 a.m.
Relatively weak mixing and infinite skew product entropy.
Cesar E. Silva*, Williams College
Philippe Thieullen, University of ParisSud, France
(90328221)

Saturday October 7, 1995, 8:30 a.m.10:50 a.m.
Special Session on Representation Theory and Combinatorics, I
Room 344, Student Center
Organizers:
Sergey Fomin, Massachusetts Institute of Technology
Richard P. Stanley, Massachusetts Institute of Technology
Andrei V. Zelevinsky, Northeastern University

8:30 a.m.
A Hecke algebra quotient and some combinatorial applications.
Chenteh Kenneth Fan*, Harvard University
(9030517)

9:00 a.m.
Schubert polynomials and configuration varieties.
Peter M. Magyar*, Utrecht University, Netherlands
(9030526)

9:30 a.m.
A generalization of the KostkaFoulkes polynomials.
Anatolii Nikolaevich Kirillov, University of Minnesota, Minneapolis
Mark Shimozono*, Massachusetts Institute of Technology
Jerzy M. Weyman, Northeastern University
(9030553)

10:00 a.m.
Combinatorial formulas for KazhdanLusztig polynomials.
Francesco Brenti*, University of Perugia, Italy
(9030539)

10:30 a.m.
An involution of the variety of flags fixed by a unipotent linear transformation.
J. Matthew Douglass*, University of North Texas
(9030506)

Saturday October 7, 1995, 8:30 a.m.10:50 a.m.
Special Session on Geometry, Topology, and Quantum Field Theory, I
Room 230, Dodge Hall
Organizers:
Daniel S. Freed, University of Texas, Austin
Ezra Getzler, Massachusetts Institute of Technology

8:30 a.m.
Rank two monopoles and invariants of smooth fourmanifolds.
Paul M. N. Feehan, Harvard University
Thomas G. Leness*, Michigan State University
(90358133)

9:00 a.m.
The Betti numbers of Kontsevich's spaces of stable mappings.
Ezra Getzler*, Massachusetts Institute of Technology
(90314222)

9:30 a.m.
Enumerating branched covers of surfaces using $2D$ YangMills theory.
W. Taylor*, Massachusetts Institute of Technology
(90381237)

10:00 a.m.
Quantum ChernSimons theory and the semiclassical expansion of the Jones polynomial of links and of Witten's invariant of rational homology spheres.
L. Rozansky*, Institute for Advanced Study
(90332178)

10:30 a.m.
Conjectures in ChernSimons perturbation theory.
Scott E. Axelrod*, Massachusetts Institute of Technology
(90381223)

Saturday October 7, 1995, 8:30 a.m.10:50 a.m.
Special Session on Syzygies and Geometry, I
Room 346, Student Center
Organizers:
Anthony A. Iarrobino, Jr., Northeastern University
Alex Martsinkovsky, Northeastern University
Jerzy M. Weyman, Northeastern University

8:30 a.m.
A description of the homological behaviour of families of quadratic forms in four variables.
JanErik I. Roos*, Stockholm University, Sweden
(90313141)

9:00 a.m.
Resolutions of multigraded modules.
Srikanth B. Iyengar*, Purdue University, West Lafayette
(90313207)

9:30 a.m.
A construction method for Gorenstein schemes in projective space.
Juan C. Migliore, University of Notre Dame
Christopher S. Peterson*, University of Notre Dame
(90314108)

10:00 a.m.
Rank varieties and their resolutions.
Olga Porras*, Merida, Venezuela
(90314155)

10:30 a.m.
Gorenstein multiple structures on smooth support.
Nicolae Manolache*, Romania Mathematisches Institut, Romania and Universitat ZurichIrchel, Switzerland
(90314216)

Saturday October 7, 1995, 8:30 a.m.10:50 a.m.
Special Session on Discrete Geometry, I
Room 270, Dodge Hall
Organizers:
Egon Schulte, Northeastern University
Marjorie Senechal, Smith College

8:30 a.m.
Bieberbach's theorem on crystallographic groups.
Andrew J. Vince*, University of Florida
(90305164)

9:00 a.m.
The form of an orbifold determines the number of tilings.
D. H. Huson*, University of Bielefeld, Germany
(9030531)

9:30 a.m.
On mutual local derivability and pentagonal tilings.
Thang Le*, State University of New York, Buffalo
(90305149)

10:00 a.m.
Tilings by related zonotopes.
Henry H. Crapo*, CAMS, France
Marjorie Senechal, Smith College
(90351116)

10:30 a.m.
Uniform stability of sphere packings.
Andras Bezdek, Auburn University, Auburn
Robert Connelly*, Cornell University, Ithaca
(90305227)

Saturday October 7, 1995, 8:30 a.m.10:50 a.m.
Special Session on Cohomology of Groups and Geometric Topology, I
Room 430, Dodge Hall
Organizers:
Solomon M. Jekel, Northeastern University
Alexandru I. Suciu, Northeastern University

8:30 a.m.
Invariant differential operators on $AHS$ manifolds.
Jarolim Bures*, Charles University, Czech Republic
(9031433)

9:00 a.m.
Seifert manifolds with $\Gamma\backslash G/K$fiber.
Kyung Bai Lee*, University of Oklahoma
Frank A. Raymond, University of Michigan, Ann Arbor
(9030582)

9:30 a.m.
On the dynamics of mapping class group actions on moduli spaces.
Richard J. Brown*, University of Maryland, College Park
(90305234)

10:00 a.m.
Noncommutative differential forms and classical algebraic topology.
Max Karoubi*, University of Paris VII, France
(9031836)

10:30 a.m.
Integer cohomology rings of nilmanifolds and their Lie algebras.
Bohumil Cenkl, Northeastern University
Richard Dawson Porter*, Northeastern University
(90305232)

Saturday October 7, 1995, 8:30 a.m.10:50 a.m.
Panel Discussion
How should we focus undergraduate courses?
Room 50, Dodge Hall
Moderators:
Deborah Hughes Hallett, Harvard University
Panelists:
Albert A. Cuoco, Howard University
David Mumford, Harvard University
Irina Peterburgsky, Suffolk University
Domenico Rosa, Teikyo Post University
J. Jerry Uhl, Jr., University of Illinois, UrbanaChampaign

Saturday October 7, 1995, 8:45 a.m.10:50 a.m.
Special Session on Partial Differential Equations in Geometry and Mathematical Physics, I
Room 348, Student Center
Organizers:
Christopher K. King, Northeastern University
Robert C. McOwen, Northeastern University
Mikhail A. Shubin, Northeastern University

8:45 a.m.
The geometry of the first Stekloff eigenvalue.
Jose F. Escobar*, Cornell University, Ithaca
(90335202)

9:20 a.m.
Uniqueness theorems through the method of moving spheres.
Yanyan Li*, Rutgers University, New Brunswick
M. J. Zhu, Rutgers University, New Brunswick
(90335188)

9:55 a.m.
Invariant manifolds for parabolic partial differential equations on unbounded domains.
Clarence Eugene Wayne*, Pennsylvania State University, University Park
(90335152)

10:30 a.m.
Asymptotic stability of solutions to nonlinear wave and KleinGordon equations.
Boris R. Vainberg*, University of North Carolina, Charlotte
Alexander Komech, Moscow State University, Russia
(90335144)

Saturday October 7, 1995, 9:00 a.m.10:50 a.m.
Special Session on Harmonic Maps, Locally Symmetric Spaces, and Related Issues, I
Room 318, Student Center
Organizers:
Kevin David Corlette, University of Chicago
Jonathan Adam Poritz, University of Maryland, College Park

9:00 a.m.
Symmetry groups of finite volume Lorentz manifolds, Part {\rm I}.
Scot Adams, University of Minnesota, Minneapolis
Garrett James Stuck*, University of Maryland, College Park
(90353122)

9:30 a.m.
Symmetry groups of finite volume Lorentz manifolds, Part {\rm II}.
Scot Adams*, University of Minnesota, Minneapolis
Garrett James Stuck, University of Maryland, College Park
(90353135)

10:00 a.m.
Anosov actions of semisimple groups.
Edward R. Goetze*, University of Michigan, Ann Arbor
(90358177)

10:30 a.m.
Symmetric spaces, geodesic flows and rigidity of invariant submanifolds.
Tracy Payne*, Washington University
(90358238)

Saturday October 7, 1995, 9:00 a.m.10:50 a.m.
Special Session on Differential Geometry and Lie Groups, I
Room 470, Dodge Hall
Organizers:
ChuuLian Terng, Northeastern University

9:00 a.m.
Dupin hypersurfaces with three principal curvatures.
Thomas E. Cecil*, College of the Holy Cross
Gary R. Jensen, Washington University
(9035392)

9:30 a.m.
Dupin hypersurfaces in Lie sphere geometry.
Thomas E. Cecil, College of the Holy Cross
Gary R. Jensen*, Washington University
(9035391)

10:00 a.m.
Taut submanifolds in symmetric spaces.
Gudlaugur Thorbergsson*, University of Cologne, Germany
ChuuLian Terng, Northeastern University
(90353142)

10:30 a.m.
The pushout space of a submanifold.
Alan West*, University of Leeds, United Kingdom
(90353145)

Saturday October 7, 1995, 9:30 a.m.10:50 a.m.
Special Session on Geometric and Hyperbolic Dynamics, I
Room 435, Student Center
Organizers:
Boris Hasselblatt, Tufts University
Zbigniew H. Nitecki, Tufts University

9:30 a.m.
Pattern families.
Juan Tolosa*, Stockton College of New Jersey
(90358217)

10:00 a.m.
Hyperbolicity of circle renormalization.
Marco Martens*, State University of New York, Stony Brook
(90358203)

10:30 a.m.
Deterministic randomness with positive probability.
Mark Levi*, Rensselaer Polytechnic Institute
(90335190)

Saturday October 7, 1995, 9:30 a.m.10:50 a.m.
Special Session on Automorphic Forms and Representation Theory, I
Room 440, Student Center
Organizers:
Lawrence E. Morris, Clark University
Freydoon Shahidi, Purdue University, West Lafayette

9:30 a.m.
Intertwining operators between derived functor modules.
Anthony W. Knapp*, State University of New York, Stony Brook
(9032252)

10:00 a.m.
Correspondence of infinitesimal characters.
JianShu Li*, University of Maryland, College Park
(90322159)

10:30 a.m.
Reducibility of generalised principal series.
L. E. Morris*, Clark University
(90322186)

Saturday October 7, 1995, 11:00 a.m.11:50 a.m.
Invited Address
Geometry and quantum field theory.
Ballroom, Ell Center
Daniel S. Freed*, University of Texas, Austin
(9035812)

Saturday October 7, 1995, 1:30 p.m.2:20 p.m.
Invited Address
Harmonic maps, harmonic forms, and locally symmetric spaces.
Ballroom, Ell Center
Kevin David Corlette*, University of Chicago
(9035711)

Saturday October 7, 1995, 2:30 p.m.3:50 p.m.
Special Session on Harmonic Maps, Locally Symmetric Spaces, and Related Issues, II
Room 318, Student Center
Organizers:
Kevin David Corlette, University of Chicago,
Jonathan Adam Poritz, University of Maryland, College Park

2:30 p.m.
Coarse geometry and rigidity.
Benson S. Farb*, University of Chicago
(90320196)

3:00 p.m.
Behavior of singularities of energyminimizing maps.
Robert M. Hardt*, Rice University
Chang you Wang, Rice University
Fanghua Lin, Courant Institute of Mathematical Sciences, New York University
(90353176)

3:30 p.m.
Global and local geometry for moduli spaces of metrics and surfaces of constant curvature.
Daniel Pollack*, University of Chicago
(90353197)

Saturday October 7, 1995, 2:30 p.m.5:50 p.m.
Special Session on Graph Theory, II
Room 333, Student Center
Organizers:
Karen L. Collins, Wesleyan University
Ruth Haas, Smith College

2:30 p.m.
Routing in graphs when delays are useful.
Gara Pruesse*, University of Vermont
(90305125)

3:00 p.m.
Recognizing undirected and directed leveledplanar graphs.
Lenwood S. Heath*, Virginia Polytechnic Institute and State University
(9030597)

3:30 p.m.
Ranking and unranking trees represented by level sequences.
Ewa M. Kubicka, University of Louisville
Kathleen A. McKeon*, Connecticut College
(90305107)

3:50 p.m.
Break

4:30 p.m.
$2$Factors in graphs.
Linda Lesniak*, Drew University
(9030515)

5:00 p.m.
A new proof of Cayley's tree counting formula.
Daniel J. Kleitman*, Massachusetts Institute of Technology
(90305127)

5:30 p.m.
Generalizing tree sum electrical network analysis formulas for graphs with port edges.
Seth D. Chaiken*, State University of New York, Albany
(90305114)

Saturday October 7, 1995, 2:30 p.m.5:20 p.m.
Special Session on Geometry of 3manifolds, II
Room 342, Student Center
Organizers:
Wendy J. Dunbar,
Robert Meyerhoff, Boston College
Jeffrey R. Weeks, Canton, New York

2:30 p.m.
Threedimensional hyperbolic convex cores.
Francis Bonahon*, University of Southern California
(9035104)

3:00 p.m.
Punctured tori, continued fractions and the ending lamination conjecture.
Yair N. Minsky*, State University of New York, Stony Brook
(90330199)

3:30 p.m.
Bending of convex core boundaries.
Martin Jude Bridgeman*, Mathematical Sciences Research Institute, Berkeley
(9035571)

4:00 p.m.
Hyperbolic Dehn surgery and algebraic and geometric convergence for Kleinian groups.
Timothy D. Comar*, University of Michigan, Ann Arbor
(9035779)

4:30 p.m.
The computational complexity of $PSL(2,C)$ discreteness criteria.
Jane P. Gilman*, Rutgers University, Newark
(90357103)

5:00 p.m.
SnapPea.
Jeffrey R. Weeks*, Canton, New York
(90357123)

Saturday October 7, 1995, 2:30 p.m.6:05 p.m.
Special Session on Representation Theory and Combinatorics, II
Room 344, Student Center
Organizers:
Sergey Fomin, Massachusetts Institute of Technology
Richard P. Stanley, Massachusetts Institute of Technology
Andrei V. Zelevinsky, Northeastern University

2:30 p.m.
A random walk on the rock placements on a Ferrers board.
Philip J. Hanlon*, University of Michigan, Ann Arbor
(90305153)

3:00 p.m.
Separation of variables for FFT's on finite groups.
David K. Maslen, Max Planck Institute for Mathematics, Germany
Daniel N. Rockmore*, Dartmouth College
(9030530)

3:30 p.m.
Hasse walk algebras.
David J. Grabiner*, Harvard University
(90305132)

4:00 p.m.
Some recent results on noncommutative Schur functions.
Curtis Greene*, Haverford College
(90305211)

4:20 p.m.
Break

4:45 p.m.
On the fully commutative elements of Coxeter groups.
John R. Stembridge*, University of Michigan, Ann Arbor
(9030518)

5:15 p.m.
Combinatorial specification of actions for some Lie algebra representations.
Robert A. Proctor*, University of North Carolina, Chapel Hill
(90317180)

5:45 p.m.
A random $q,t$hook walk and a sum of Pieri coefficients.
Adriano M. Garsia*, University of California at San Diego, La Jolla
Mark Haiman, University of California at San Diego, La Jolla
(9030583)

Saturday October 7, 1995, 2:30 p.m.4:50 p.m.
Special Session on Geometry, Topology, and Quantum Field Theory, II
Room 230, Dodge Hall
Organizers:
Daniel S. Freed, University of Texas, Austin
Ezra Getzler, Massachusetts Institute of Technology

2:30 p.m.
Mirror symmetry and string theory.
ShingTung Yau*, Harvard University
(9038149)

3:00 p.m.
Intersection numbers in the moduli space of flat connections on a Riemann surface.
Lisa Claire Jeffrey*, McGill University
(9035877)

3:30 p.m.
YangBaxter ChernSimons models and link invariants.
Arkady Vaintrob*, University of Utah
(90357236)

3:50 p.m.
Problem Session

Saturday October 7, 1995, 2:30 p.m.4:50 p.m.
Special Session on Syzygies and Geometry, II
Room 346, Student Center
Organizers:
Anthony A. Iarrobino, Jr., Northeastern University
Alex Martsinkovsky, Northeastern University
Jerzy M. Weyman, Northeastern University

2:30 p.m.
A vestigial ideal generation conjecture.
Brian Harbourne*, University of Nebraska, Lincoln
(9031343)

3:00 p.m.
The possible dimensions of the higher secant varieties.
Michael L. CatalanoJohnson*, Swarthmore College
(9031473)

3:30 p.m.
Invariants of isolated singularities.
Ruth I. Michler*, University of Northern Texas, Denton
(9031457)

4:00 p.m.
Complexes associated to two sequences and a matrix.
Andrew Richard Kustin*, University of South Carolina, Columbia
(9031323)

4:30 p.m.
Symmetric and exterior powers of complexes.
Alexandre B. Tchernev*, Purdue University, West Lafayette
(90313156)

Saturday October 7, 1995, 2:30 p.m.5:05 p.m.
Special Session on Partial Differential Equations in Geometry and Mathematical Physics, II
Room 348, Student Center
Organizers:
Christopher K. King, Northeastern University
Robert C. McOwen, Northeastern University
Mikhail A. Shubin,

2:30 p.m.
Fundamental solutions and Hamiltonian mechanics.
Richard W. Beals*, Yale University
Bernard Gaveau, Lille, France
Peter C. Greiner, University of Toronto
(90335129)

3:05 p.m.
Hamiltonian mechanics and fundamental solutions for subelliptic operators.
Peter C. Greiner*, University of Toronto
(9033521)

3:40 p.m.
$L_2$analytic and Reidemeister torsion for manifolds with boundary.
Dan Burghelea*, Ohio State University, Columbus
Thomas Kappeler, Ohio State University, Columbus
Leonid Friedlander, University of Arizona
(90335119)

4:15 p.m.
The first nodal line in a long thin convex domain.
Daniel Grieser*, Massachusetts Institute of Technology
David Jerison, Massachusetts Institute of Technology
(90335248)

4:45 p.m.
Spectrum of Neumann Laplacian on planar domains with cusplike ends.
Julian K. Edward*, Florida International University
(90335235)

Saturday October 7, 1995, 2:30 p.m.4:50 p.m.
Special Session on Automorphic Forms and Representation Theory, II
Room 440, Student Center
Organizers:
L. E. Morris, Clark University
Freydoon Shahidi, Purdue University, West Lafayette

2:30 p.m.
Periods.
S. Rallis*, Ohio State University, Columbus
(90311200)

3:00 p.m.
Shahidi local coefficients for nongeneric representations of some classical groups.
David Goldberg*, Purdue University, West Lafayette
Solomon Friedberg, University of California, Santa Cruz
(90322154)

3:30 p.m.
On the residual automorphic representations.
Henry H. Kim*, Southern Illinois University, Carbondale
Freydoon Shahidi, Purdue University, West Lafayette
(90322140)

4:00 p.m.
Automorphic induction for $GL(n)$.
Guy M. Henniart, University of ParisSud, France
Rebecca A. Herb*, University of Maryland, College Park
(9032267)

4:30 p.m.
Zeta functions for orthogonal groups and multiplicities.
Birgit Speh*, Cornell University
Jurgen Rohlfs, Catholic University Eichstaat, Germany
(90399255)

Saturday October 7, 1995, 2:30 p.m.5:20 p.m.
Special Session on Discrete Geometry, II
Room 270, Dodge Hall
Organizers:
Marjorie Senechal, Smith College
Egon Schulte, Northeastern University

2:30 p.m.
The $d$step conjecture and Gaussian elimination.
Jeffrey C. Lagarias*, AT&T Bell Laboratories, Murray Hill, New Jersey
Nagabhushana Prabhu, Purdue University, West Lafayette
James A. Reeds, AT&T Bell Laboratories, Murray Hill, New Jersey
(90352101)

3:00 p.m.
On the number of facets of a projection of a convex $d$polytope.
Steven W. Knox*, University of Illinois, UrbanaChampaign
(90352151)

3:30 p.m.
Tiling: The role of notation.
Doris W. Schattschneider*, Moravian College
(90305173)

4:00 p.m.
Matching rules and substitution tilings.
Chaim GoodmanStrauss*, University of Arkansas
(90352170)

4:30 p.m.
Density bounds for highly saturated packings and reduced coverings.
Gabor Toth, Hungarian Academy of Science, Hungary
Gregory J. Kuperberg, Yale University
Wlodzimierz Kuperberg*, Auburn University, Auburn
(90352175)

5:00 p.m.
Some geometry for plane $CAD$.
Walter J. Whiteley*, York University
(9035254)

Saturday October 7, 1995, 2:30 p.m.4:20 p.m.
Special Session on Cohomology of Groups and Geometric Topology, II
Room 430, Dodge Hall
Organizers:
Solomon M. Jekel, Northeastern University
Alexandru I. Suciu, Northeastern University

2:30 p.m.
Finite type invariants of homology $3$spheres.
Jerome P. Levine*, Brandeis University
Stavros Garoufalidis, Massachusetts Institute of Technology
(90320158)

3:00 p.m.
Topological quantum field theory with corners.
Charles Frohman*, University of Iowa
(90357120)

3:30 p.m.
Representations of knot groups, equivariant knot signature, and the Casson invariant.
Christopher M. Herald*, McMaster University
(90357113)

4:00 p.m.
Knot invariants from symbolic dynamics.
Daniel S. Silver*, University of South Alabama
Susan Gayle Williams, University of South Alabama
(9030542)

Saturday October 7, 1995, 2:30 p.m.4:50 p.m.
Special Session on Differential Geometry and Lie Groups, II
Room 470, Dodge Hall
Organizers:
ChuuLian Terng, Northeastern University

2:30 p.m.
On $k$minimal submanifolds.
Sheila Carter*, University of Leeds, United Kingdom
(90353147)

3:00 p.m.
Periods of central elements in Heisenberglike $2$step nilpotent Lie groups.
Maura B. Mast*, University of Northern Iowa
Ruth Gornet, Texas Tech University
(9032241)

3:30 p.m.
Flat affine surfaces with flat normal connection.
Martin A. Magid*, Wellesley College
Luc Vrancken, Catholic University Louvain, Belgium
(90353118)

4:00 p.m.
Tight immersions of manifolds like projective spaces.
Ross S. Niebergall*, University of Northern British Columbia
Gudlaugur Thorbergsson, University of Cologne, Germany
(90353174)

4:30 p.m.
Affine isoparametric and Dupin hypersurfaces.
Patrick J. Ryan*, McMaster University
(90353191)

Saturday October 7, 1995, 2:30 p.m.5:10 p.m.
Session on Contributed Papers, I
Room 340, Student Center

2:30 p.m.
Estimates for the wave operator on the torus.
Akos Magyar*, Princeton University
(90399204)

2:45 p.m.
Exotic free involutions on complex surfaces.
Shuguang Wang*, University of Missouri, Columbia
(9038170)

3:00 p.m.
The Dirichlet problem for $m$harmonic functions on the mobius strip.
D. Ghisa*, York University
(9035847)

3:15 p.m.
$P$groups and fifth Hilbert's problem.
Boris S. Khots*, Lynn, Massachusetts
(90353183)

3:30 p.m.
Perfect matchings of graphs with reflective symmetry.
Mihai Adrian Ciucu*, University of Michigan, Ann Arbor
(90352111)

3:45 p.m.
Determination of an unknown source in a heat equation.
Ping Wang*, Pennsylvania State University, Schuykill
Kewang Zheng, Hebei Inst Light Ind/Chem Tech, People's Republic of China
(9033503)

4:00 p.m.
The postulational formulation of the partial differential equations of mathematical physics.
Domina E. Spencer*, University of Connecticut, Storrs
Uma Shama, Bridgewater State College
(9033551)

4:15 p.m.
Sheaves with connection on abelian varieties.
Mitchell J. Rothstein*, University of Georgia
(9033284)

4:30 p.m.
Mean curvature preserving isometries between surfaces in $R^3$.
Georgi I. Kamberov*, University of Massachusetts, Amherst
(9035369)

4:45 p.m.
Distinguished representations for unitary groups.
Ramanujachary Kumanduri*, Columbia University
(90311253)

5:00 p.m.
Recursive recognizability and universal finitely presented groups.
Natasa Bozovic*, San Jose State University
(90399254)

Saturday October 7, 1995, 2:30 p.m.5:00 p.m.
Panel Discussion
What can industrial mathematics offer university mathematics and vice versa?
Room 50, Dodge Hall
Moderators:
Paul W. Davis, Worcester Polytechnic Institute
Panelists:
William J. Browning, Applied Mathematics Inc, Gales Ferry, CT
Richard A. Games, The MITRE Corporation, Inc., Bedford, MA
Arthur Heinricher, Worcester Polytechnic Institute
Clas Jacobsen, United Technologies Research Center, East Hartford, CT

Saturday October 7, 1995, 2:40 p.m.5:20 p.m.
Special Session on Geometric and Hyperbolic Dynamics, II
Room 435, Student Center
Organizers:
Boris Hasselblatt, Tufts University
Zbigniew H. Nitecki, Tufts University

2:40 p.m.
Stable ergodicity and partial hyperbolicity.
Michael Shub*, IBM T. J. Watson Research Center, Yorktown Heights, New York
(90358104)

3:30 p.m.
Synchronization of Anosov flows.
Slobodan Simic*, University of California, Berkeley
(9035868)

4:00 p.m.
The infinite periodic Lorentz gas is spacetime Bernoulli.
Cymra Haskell*, University of Texas, Austin
(9035885)

4:30 p.m.
Stable ergodicity of maps arising from geodesic flows.
Amie Wilkinson*, Harvard University
(90358194)

5:00 p.m.
Approximation of attractors by Ulam's method.
Fern Y. Hunt*, National Institute of Standards & Technology
(90358218)

Saturday October 7, 1995, 3:30 p.m.5:50 p.m.
Special Session on Ergodic Theory, II
Room 433, Student Center
Organizers:
Stanley J. Eigen, Northeastern University
Vidhu S. Prasad, University of Massachusetts, Lowell

3:30 p.m.
Dyadic equivalence to actions of completely positive entropy.
Adam Fieldsteel*, Wesleyan University
J. Roberto HasfuraBuenaga, Trinity University
(9032865)

4:00 p.m.
Restricted orbit equivalence for actions of discrete amenable groups.
Janet Whalen Kammeyer*, United States Naval Academy
Daniel Jay Rudolph, University of Maryland, College Park
(9032835)

4:30 p.m.
Interrelations between determinism, zeroentropy and orbit separation.
Jonathan L. F. King*, University of Florida
(9032858)

5:00 p.m.
Construction of simple measurepreserving maps with prescribed automorphism group.
Andres del Junco*, University of Toronto
(90328150)

5:30 p.m.
Strong orbit realization for minimal homeomorphisms.
Nicholas S. Ormes*, University of Maryland, College Park
(90328162)
Inquiries: meet@ams.org