
AMS Sectional Meeting Full Program
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2000 Fall Eastern Section Meeting
New York, NY, November 45, 2000
Meeting #959
Associate secretaries: Lesley M Sibner, AMS lsibner@duke.poly.edu
Saturday November 4, 2000

Saturday November 4, 2000, 7:30 a.m.5:00 p.m.
Meeting Registration
First Floor, Havemeyer Building

Saturday November 4, 2000, 7:30 a.m.5:00 p.m.
Exhibit and Book Sale
First Floor, Havemeyer Building

Saturday November 4, 2000, 8:30 a.m.10:50 a.m.
Special Session on Differential Algebra and Related Topics, I
Room 410, International Affairs Building Organizers: Li Guo, Rutgers University at Newark liguo@newark.rutgers.edu
William Keigher, Rutgers University at Newark keigher@newark.rutgers.edu
William Sit, City College (CUNY) wyscc@cunyvm.cuny.edu

8:30 a.m.
Using Ritt's characteristic sets to compute the normalizers of the intransitive Lie algebras of vector fields on the plane.
Phyllis Cassidy*, Smith College (emerita)
(95912283)

9:00 a.m.
Computing the Galois Group of $y^{(3)} + ay' + by = 0,\ a, b \in {\mathcal C}[x]$.
Peter H Berman*, North Carolina State University
(95912178)

9:30 a.m.
Prounipotent Groups in Differential Galois Theory.
Andy R Magid*, University of Oklahoma
(95912157)

10:00 a.m.
On a Generic Inverse Differential Galois Problem for GL$_n$.
Lourdes Juan*, MSRI
(95913123)

10:30 a.m.
Model Theory and Differential Algebra.
David E Marker*, University of Illinois at Chicago
(95903128)

Saturday November 4, 2000, 8:30 a.m.10:50 a.m.
Special Session on Commutative Algebra, I
Room 411, International Affairs Building Organizers: Irena Peeva, Cornell University irena@math.cornell.edu
Luchezar Avramov, Purdue University avramov@math.purdue.edu

8:30 a.m.
Secant Varieties of Segre Varieties and Monomial Ideals.
Maria V Catalisano, University of Genoa
Anthony V Geramita*, Univ. of Genoa, Queen's Univ.
Alessandro Gimigliano, University of Bologna
(95913148)

9:00 a.m.
Effective results on the homology of powers of a maximal ideal.
Liana M Sega*, Purdue University
(95913173)

9:30 a.m.
A formula of SolomonTerao and bundles on ${\bf P}^n$.
Mircea Mustata, U/C Berkeley
Hal Schenck*, Harvard University
(95913155)

10:00 a.m.
De Rham cohomology, Gr\"obner bases and stratifications.
Uli Walther*, Purdue University
(95914150)

10:30 a.m.
Directsum decompositions over local rings.
Roger A Wiegand*, University of Nebraska
(95913211)

Saturday November 4, 2000, 8:30 a.m.10:25 a.m.
Session for Contributed Papers, I
Room 520, Mathematics Building

9:00 a.m.
Functional Measure for Separable Systems with Dynamical Activity.
C.S. Felicitas, C.F.C.T.E. Foundation, Inc.
M.W. Auslander*, C.F.C.T.E. Foundation, Inc.
(9592206)

9:15 a.m.
Compositional Functions of Order N on Assymetric Fields of Analytic Data.
C. S. Felicitas*, CFCTE Foundation and Gottlieb Library
M. W. Auslander, CFCTE Foundation and Gottlieb Library
(95976243)

9:30 a.m.
The Mystery of Knots  Computer Programming for Knot Tabulation.
Charilaos N Aneziris*, Stony Brook, New York
(9595781)

10:15 a.m.
Angular Ratio Transference.
James H Mulberry*, AMS
(95951110)

Saturday November 4, 2000, 8:40 a.m.10:50 a.m.
Special Session on Arrangements of Hyperplanes, I
Room 207, Mathematics Building Organizers: Michael J. Falk, Northern Arizona University michael.falk@nau.edu
Alexander I. Suciu, Northeastern University alexsuciu@neu.edu

8:40 a.m.
Triples of arrangements and local systems.
Daniel C Cohen*, Louisiana State University
(95952182)

9:15 a.m.
Incidence combinatorics of model constructions.
EvaMaria E Feichtner*, ETH Zurich
Dmitry N Kozlov, Royal Institute of Technology, Stockholm, Sweden
(95906252)

9:50 a.m.
The cohomology rings of complements of subspace arrangements.
Mark de Longueville*, University of Minnesota
Carsten A Schultz, Freie Universitaet Berlin
(95952104)

10:25 a.m.
Equivariant Euler characteristics of braid arrangements.
Graham C Denham*, University of Oregon
Nicole M Lemire, University of Oregon
(95920275)

Saturday November 4, 2000, 9:00 a.m.10:50 a.m.
Special Session on the Topology of 3Manifolds, I
Room 312, Mathematics Building Organizers: Joan S. Birman, Barnard College jb@math.columbia.edu
Brian S. Mangum, Barnard College mangum@math.columbia.edu
Walter D. Neumann, Barnard College neumann@math.columbia.edu

9:00 a.m.
The Orbifold Theorem.
Daryl Cooper*, UCSB
Craig Hodgson, Melbourne
Steve Kerckhoff, Stanford
(95957166)

9:30 a.m.
Covering spaces and Dehn fillings.
Cynthia L. Curtis*, The College of New Jersey
(95957198)

10:00 a.m.
Towards unification of number theory and 3dimensional topology.
Adam S Sikora*, CRM/ISM
(95957288)

10:30 a.m.
Mahler measure and Alexander polynomials of links.
Daniel S Silver*, University of South Alabama
Susan G Williams, University of South Alabama
(95957103)

Saturday November 4, 2000, 9:00 a.m.10:45 a.m.
Special Session on Symbolic Computation and Kleinian Groups, I
Room 203, Mathematics Building Organizers: Jane P. Gilman, Rutgers University gilman@andromeda.rutgers.edu
Mika K. Seppala, Florida State University Mika.Seppala@fsu.edu

8:45 a.m.
Symbolic Computation on Kleinian Groups.
Jane Gilman*, RutgersNewark
(95920267)

9:10 a.m.
Hyperbolic Volumes.
Gaven Martin*, University of Auckland, New Zealand
T. Marshall, University of Auckland, New Zealand
(95920293)

9:35 a.m.
Hecke operators, arithmetic groups, and the cohomology of subgroups of $SL_{4} (\mathbb{Z})$.
Paul E Gunnells*, Rutgers University
(95911197)

10:00 a.m.
1) Local fundamental groups and surface classification ( an extension of a theorem of Mumford).
Fabrizio ME Catanese*, University of Goettingen
(95914208)

10:25 a.m.
Period doubling in the Tangent Family.
Linda Keen*, CUNY Lehman and Graduate Center
Janina Kotus, Institute of Mathematics, Technical Univerity of Warsaw
(95937170)

Saturday November 4, 2000, 9:00 a.m.10:50 a.m.
Special Session on Algebraic Geometry, I
Room 417, Mathematics Building Organizers: Sorin Popescu, Columbia University psorin@math.columbia.edu
Lev A. Borisov, Columbia University lborisov@math.columbia.edu

9:00 a.m.
Hurwitz numbers and Hodge integrals.
Tom Graber*, Harvard
Ravi Vakil, MIT
(95914247)

9:30 a.m.
Hurwitz numbers and the tautological ring of the moduli space of curves.
Ravi Vakil*, M.I.T.
Tom Graber, Harvard
(95914169)

10:00 a.m.
Localization and GromovWitten theory.
Rahul V. Pandharipande*, Caltech
(95914279)

10:30 a.m.
Hyperquot schemes and rational curves on flag varieties.
Linda Chen*, Columbia University
(95914276)

Saturday November 4, 2000, 9:00 a.m.10:50 a.m.
Special Session on Nonlinear Partial Differential Equations, I
Room 403, International Affairs Building Organizers: ZhengChao Han, Rutgers University zchan@math.rutgers.edu
A. Shadi TahvildarZadeh, Princeton University shadi@princeton.edu

9:00 a.m.
Singularities for solutions of the wave equation on conic manifolds.
Richard B Melrose, MIT
Jared Wunsch*, SUNY Stony Brook
(95935187)

9:30 a.m.
Instantons, Characteristic Classes, and Nonlinear Elliptic Equations.
Yisong Yang*, Polytechnic University
(95935125)

10:00 a.m.
Asymptotics for MaxwellChernSimons vortices.
Tonia Ricciardi*, Dipartimento di Matematica e Applicazioni, Universit\`a di Napoli ``Federico II''
(95935143)

10:30 a.m.
$L^p$ Estimates for the Wave Equation with a SlowlyDecaying Potential.
John G Stalker*, Princeton University
Fabrice Planchon, CNRS, Paris VI
A. Shadi TahvildarZadeh, Rutgers University
(95935268)

Saturday November 4, 2000, 9:00 a.m.11:00 a.m.
Special Session on Riemannian Manifolds and Their Limit Spaces, I
Room 405, International Affairs Building Organizers: Xiaochun Rong, Rutgers University rong@math.rutgers.edu
Christina Sormani, Lehman College, CUNY sormanic@member.ams.org

9:00 a.m.
A class of generalized convex functions and its relation to warped products.
Stephanie B Alexander*, University of Illinois at UrbanaChampaign
Richard L. Bishop, University of Illinois at UrbanaChampaign
(95953164)

9:45 a.m.
Differential Forms, Spinors and Bounded Curvature Collapse.
John Lott*, University of Michigan
(95958118)

10:30 a.m.
A Sheaf Perspective on $L^2$ Harmonic Forms.
Eugenie Hunsicker*, Lawrence University
Rafe Mazzeo, Stanford University
(95953263)

Saturday November 4, 2000, 9:30 a.m.10:50 a.m.
Special Session on Combinatorial Group Theory, I
Room 404, International Affairs Building Organizers: Gilbert Baumslag, City College (CUNY) gilbert@groups.sci.ccny.cuny.edu
Sean T. Cleary, City College (CUNY) cleary@scisun.sci.ccny.cuny.edu
Alexei Myasnikov, City College (CUNY)
Vladimir Shplirain, City College (CUNY) shpil@groups.sci.ccny.cuny.edu

9:30 a.m.
Diophantine geometry for free groups, dimension of algebraic varieties.
Olga Kharlampovich*, McGill University, Canada
(95920204)

10:00 a.m.
Finitely presented torsionbycyclic nonamenable group.
A.Yu. Ol'shanskii*, Vanderbilt University
M.V. Sapir, Vanderbilt University
(95920217)

10:30 a.m.
Proalgebraic hulls of discrete groups: examples and questions.
Andy R Magid*, University of Oklahoma
(9592080)

Saturday November 4, 2000, 11:00 a.m.11:50 a.m.
Invited Address
Operators on graphs: Soliton systems, scattering theory and symplectic geometry.
Room 309, Havemeyer Building
Sergey P. Novikov*, U. of Maryland and Landau Institute for Theoretical Physics
(9594702)

Saturday November 4, 2000, 1:30 p.m.2:20 p.m.
Invited Address
Equidistribution on Shimura varieties and applications.
Room 309, Havemeyer Building
Paula Cohen*, CNRS, Lille, France
(9591103)

Saturday November 4, 2000, 2:30 p.m.5:40 p.m.
Special Session on Combinatorial Group Theory, II
Room 404, International Affairs Building Organizers: Gilbert Baumslag, City College (CUNY) gilbert@groups.sci.ccny.cuny.edu
Sean T. Cleary, City College (CUNY) cleary@scisun.sci.ccny.cuny.edu
Alexei Myasnikov, City College (CUNY)
Vladimir Shplirain, City College (CUNY) shpil@groups.sci.ccny.cuny.edu

2:30 p.m.
Word reversing and torsion freeness.
Patrick Dehornoy*, University of Caen, France
(95920136)

3:00 p.m.
On subgroup separability in hyperbolic Coxeter groups.
Darren D Long*, UC Santa Barbara
Alan W Reid, University of Texas
(95922119)

3:30 p.m.
Action of braid groups on determinantal ideals, compact spaces and a stratification of Teichm\"uller space.
Stephen P Humphries*, Brigham Young University
(9592078)

4:00 p.m.
Break.

4:20 p.m.
Finite and nilpotent quotients of braid groups and link groups.
Theodore Stanford*, New Mexico State University
(95957270)

4:50 p.m.
The surjectivity problem for onegenerator, onerelator extensions of torsionfree groups.
Marshall M. Cohen*, Cornell University
Colin Rourke, Warwick University
(95920160)

5:20 p.m.
The chameleon groups of Richard J. Thompson: categories with mutliplication.
Matt Brin*, SUNY Binghamton
(95920235)

Saturday November 4, 2000, 2:30 p.m.5:20 p.m.
Special Session on the Topology of 3Manifolds, II
Room 312, Mathematics Building Organizers: Joan S. Birman, Barnard College jb@math.columbia.edu
Brian S. Mangum, Barnard College mangum@math.columbia.edu
Walter D. Neumann, Barnard College neumann@math.columbia.edu

2:30 p.m.
Cusp volumes and cusp densities for hyperbolic 3manifolds.
Colin C Adams*, Williams College
(95957260)

3:00 p.m.
Metric characterizations of spherical and Euclidean buildings.
Ruth M Charney*, Ohio State University
Alexander Lytchak, University of Bonn
(95920273)

3:30 p.m.
All flat manifolds are hyperbolic orbifold cusp crosssections.
Darren D Long*, UC Santa Barbara
Alan W Reid, University of Texas
(95957116)

4:00 p.m.
The Quest for the Low Volume Hyperbolic 3Manifold.
Robert Meyerhoff*, Boston College
(95957272)

4:30 p.m.
Bounded geometry for hyperbolic manifolds.
Yair N Minsky*, SUNY at Stony Brook
(95957175)

5:00 p.m.
The double of the figure eight is GFERF.
Alan W Reid*, U. T. Austin
Darren Long, U.C.S.B.
(95957188)

Saturday November 4, 2000, 2:30 p.m.5:50 p.m.
Special Session on Arrangements of Hyperplanes, II
Room 207, Mathematics Building Organizers: Michael J. Falk, Northern Arizona University michael.falk@nau.edu
Alexander I. Suciu, Northeastern University alexsuciu@neu.edu

2:30 p.m.
Shephard Groups and the Sign Representation.
Peter Orlik, University of Wisconsin at Madison
Victor Reiner, School of Mathematics
Anne V Shepler*, University of California at Santa Cruz
(95952249)

3:05 p.m.
Cohomology ring of the complement to rational arrangements and Generalized Aomoto Complexes.
Jos\'e I Cogolludo*, Universidad Complutense de Madrid
(95914264)

3:40 p.m.
Constructing Canonical Generating Sets for the Module of ADerivations of an Arrangement of Hyperplanes and Conditions Determining Freeness.
John M Keaty*, IBM Austin, Texas
(95914289)

4:15 p.m.
Reflection Groups and Milnor Fiber Complexes.
Stephen D Szydlik*, University of WisconsinOshkosh
(95952242)

4:50 p.m.
Compactifications of real subspace and halfspace arrangements.
Giovanni Gaiffi*, Scuola Normale Superiore di Pisa, Italy
(95952132)

5:25 p.m.
Resonance varieties and fibered arrangements.
Michael J Falk*, Northern Arizona University
(95952251)

Saturday November 4, 2000, 2:30 p.m.5:50 p.m.
Special Session on Arithmetic Geometry and Modular Forms, I
Room 209, Havemeyer Building Organizers: Dorian Goldfeld, Columbia University goldfeld@columbia.edu
Paula Cohen, University of Lille Paula.Cohen@agat.univlille1.fr

2:30 p.m.
Nonanalytic Poincar\'e Series and Eichler Integrals.
Wladimir A Pribitkin*, Princeton University
(9591195)

3:00 p.m.
N\'eronTate projection of algebraic points.
Bjorn Poonen*, U. C. Berkeley
(95911215)

3:30 p.m.
Families of L functions and applications.
Peter Sarnak*, Princeton University
(95911202)

4:00 p.m.
The Least Prime in a Conjugacy Class.
Kumar Murty*, University of Toronto
(95911229)

4:30 p.m.
Coverings of curves with asymptotically many rational points.
W.C. W. Li*, Penn State University
H. Maharaj, Institute of Discrete Mathematics
(95911199)

5:00 p.m.
The Euclidean Algorithm in Number Fields.
Ram Murty*, Queen's University
(95911180)

5:30 p.m.
Subvarieties of Shimura varieties.
Bas Edixhoven*, University of Rennes
(95911142)

Saturday November 4, 2000, 2:30 p.m.5:20 p.m.
Special Session on Differential Algebra and Related Topics, II
Room 410, International Affairs Building Organizers: Li Guo, Rutgers University at Newark liguo@newark.rutgers.edu
William Keigher, Rutgers University at Newark keigher@newark.rutgers.edu
William Sit, City College (CUNY) wyscc@cunyvm.cuny.edu

2:30 p.m.
Central configurations in the Newtonian Nbody problem of Celestial Mechanics.
Ilias Kotsireas*, Ontario Research Centre for Computer Algebra
(95970269)

3:00 p.m.
On Applications of Cartan's Method of Moving Frames.
Irina A Kogan*, Yale University
(95953237)

3:30 p.m.
Dmodules on smooth toric varieties.
Mircea Mustata, University of California at Berkeley
Gregory Smith, University of California at Berkeley
Harrison Tsai*, Cornell University
Uli Walther, Purdue University
(95914207)

4:00 p.m.
Differential Operators on Toric Varieties.
William N Traves*, U.S. Naval Academy
Mutsumi Saito, Hokkaido University, Japan
(9591391)

4:30 p.m.
Rank Jumps in $A$Hypergeometric Systems.
Laura F Matusevich*, University of California at Berkeley
(95905138)

5:00 p.m.
Multivariable Differential Dimension Polynomials.
Alexander B Levin*, The Catholic University of America, Washington, D. C.
(95912102)

Saturday November 4, 2000, 2:30 p.m.5:50 p.m.
Special Session on Commutative Algebra, II
Room 411, International Affairs Building Organizers: Irena Peeva, Cornell University irena@math.cornell.edu
Luchezar Avramov, Purdue University avramov@math.purdue.edu

2:30 p.m.
Finite Correspondences between commutative rings and motivic functors.
Charles A Weibel*, Rutgers University
(95913193)

3:00 p.m.
Polynomial functors on complexes.
Alexandre Tchernev*, University at Albany,SUNY
Jerzy Weyman, Northeastern University
(95913201)

3:30 p.m.
Frobenius and Tor.
Claudia Miller*, Michigan State University
(95913274)

4:00 p.m.
The BuchsbaumRim polynomial and the integral closure of a module.
Joseph P Brennan*, North Dakota State University
Bernd Ulrich, Michigan State University
Wolmer V Vasconcelos, Rutgers University
(95913291)

4:30 p.m.
A Technique for the Explicit Computation of Local Cohomology with Respect to Monomial Ideals.
Andrew S Richardson*, University of Illinois at UrbanaChampaign
(95913127)

5:00 p.m.
Building integral domains using power series.
William Heinzer, Purdue
Christel Rotthaus, Michigan State University
Sylvia M Wiegand*, University of NebraskaLincoln
(95913209)

5:30 p.m.
Commutativity of Hochschild Cohomology.
RagnarOlaf Buchweitz*, Univ. of Toronto
Hubert Flenner, RuhrUniversitaet Bochum
(95918205)

Saturday November 4, 2000, 2:30 p.m.4:50 p.m.
Special Session on Algebraic Geometry, II
Room 417, Mathematics Building Organizers: Sorin Popescu, Columbia University psorin@math.columbia.edu
Lev A. Borisov, Columbia University lborisov@math.columbia.edu

2:30 p.m.
The Decomposition Theorem for Hochschild (Co)Homology of Complex Spaces.
RagnarOlaf Buchweitz*, Univ. of Toronto
Hubert Flenner, RuhrUniversitaet Bochum
(95914203)

3:00 p.m.
Deformations of moduli spaces and noncommutative geometry.
Ludmil Katzarkov, UC Irvine
Dmitry Orlov, Steklov Institute, Russia
Tony Pantev*, University of Pennsylvania
(95914221)

3:30 p.m.
Mirror symmetry, Langlands duality, and the Hitchin system.
Michael Thaddeus*, Columbia University
(95914165)

4:30 p.m.
A FourierMukai approach to spectral data for instantons.
Marcos B Jardim*, University of Pennsylvania and Haverford College
Antony Maciocia, University of Edinburgh
(9591457)

Saturday November 4, 2000, 2:30 p.m.4:50 p.m.
Special Session on Nonlinear Partial Differential Equations, II
Room 403, International Affairs Building Organizers: ZhengChao Han, Rutgers University zchan@math.rutgers.edu
A. Shadi TahvildarZadeh, Princeton University shadi@princeton.edu

2:30 p.m.
Antiferromagnetism and quantum Hall effects on magnetic bubbles.
FangHua Lin*, Courant InstituteNYU
(95935230)

3:00 p.m.
A GinzburgLandau Type Equation from Anteferromagnets and Related Problems.
Fengbo Hang*, Courant Institute
Fanghua Lin, Courant Institute
(95935227)

3:30 p.m.
Regularity of the blowup set of a semilinear heat equation.
Hatem Zaag*, Courant Institute and CNRS ENS
(95935139)

4:00 p.m.
Improved regularity results for the quasilinear wave equations.
Sergiu Klainerman, Princeton University
Igor Rodnianski*, Princeton University
(95935189)

4:30 p.m.
The VlasovPoissonBoltzmann system near vaccum.
Yan Guo*, Division of Applied Math. Brown University
(95935126)

Saturday November 4, 2000, 2:30 p.m.4:55 p.m.
Session for Contributed Papers, II
Room 520, Mathematics Building

2:30 p.m.
A geometric interpretation of $\bar{\mu}(ijk)$.
Blake Mellor*, Honors College, FAU
Paul Melvin, Bryn Mawr College
(95957111)

2:45 p.m.
Instability of Statistical Factor Analysis.
Steven P Ellis*, Columbia University and NYSPI
(95965144)

3:00 p.

