AMS Sectional Meeting Program by Day
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Inquiries: meet@ams.org
1998 Fall Central Section Meeting
Chicago, IL, September 1213, 1998
Meeting #935
Associate secretaries:
Susan J Friedlander, AMS
susan@math.northwestern.edu
Sunday September 13, 1998

Sunday September 13, 1998, 8:00 a.m.11:00 a.m.
Meeting Registration
Lobby (8th floor), Lewis Center

Sunday September 13, 1998, 8:00 a.m.10:50 a.m.
Special Session on Commutative Algebra, III
Room 1115, Lewis Center
Organizers:
Irena V. Peeva, Massachusetts Institute of Technology irena@math.mit.edu
Michael Stillman, Cornell University mike@math.cornell.edu

8:00 a.m.
On cohomology algebras of complex subspace arrangements.
Eva Maria E. Feichtner*, Institute for Advanced Study, Princeton
G\"unter M. Ziegler, University of Technology Berlin
(93513160)

8:30 a.m.
Mixed dominating matrices.
Klaus G Fischer*, George Mason University
(93513119)

9:00 a.m.
A Theorem on SmoothnessBassQuillen, Chow Groups and Intersection Multiplicity of Serre.
Sankar P. Dutta*, University of Illinois at UrbanaChampaign
(9351364)

9:30 a.m.
Sharper estimates for the HilbertKunz function in dimension 2.
Paul Monsky*, Brandeis University
(9351310)

10:00 a.m.
Approximating Discrete Valuation Rings by Regular Local Rings.
William Heinzer, Purdue University
Christel Rotthaus, Michigan State University
Sylvia Wiegand*, University of Nebraska
(93513143)

10:30 a.m.
Deviations of local homomorphisms and finiteness of Andr\'eQuillen homology.
Luchezar L. Avramov*, Purdue University
(93513189)

Sunday September 13, 1998, 8:00 a.m.10:50 a.m.
Special Session on Algebraic Combinatorics: Association Schemes and Related Topics, III
Room 8005, DePaul Center
Organizers:
Sung Yell Song, Iowa State University sung@math.iastate.edu

8:00 a.m.
BoseMesner automorphisms and subschemes.
Chris D Godsil*, University of Waterloo
(9350567)

8:30 a.m.
Character Products and $Q$Polynomial Group Association Schemes.
Hiroshi Suzuki*, Department of Mathematics, International Christian University
(9350585)

9:00 a.m.
Integral table algebras and commutative association schemes with a nonsymmetric relation of valency 3.
Harvey I. Blau*, Northern Illinois University
(9350570)

9:30 a.m.
Some Remarks on a Regular Thin Near 7Gon.
Andrew J Woldar*, Villanova University
(93505187)

10:00 a.m.
Generalized classes in association schemes: arithmetic properties and a dual of a result of Burnside.
Kenneth W Johnson*, Penn state University, Abington College
Eirini Poimenidou, New College of the University of South Florida.
(93505109)

10:30 a.m.
Superscheme Classes, Burnside Algebras, and Speed's Orbit Problem.
Jonathan D. H. Smith*, Iowa State University
(93505108)

Sunday September 13, 1998, 8:00 a.m.11:00 a.m.
Exhibit and Book Sale
Lobby (8th floor), Lewis Center

Sunday September 13, 1998, 8:20 a.m.10:50 a.m.
Special Session on Rigidity in Geometry and Dynamics, III
Room 1008, Lewis Center
Organizers:
Steven E Hurder, University of Illinois at Chicago hurder@uic.edu
Ralf J. Spatzier, University of Michigan spatzier@math.lsa.umich.edu

9:00 a.m.
Rigidity of weakly hyperbolic actions of higher real rank semisimple Lie groups and their lattices .
Gregory A. Margulis*, Yale University
Nantian Qian, Yale University
(9355888)

10:00 a.m.
Some applications of the SL(2,R) action on Teichmuller space.
Alex Eskin*, University of Chicago
(93522233)

10:30 a.m.
On the asymptotic geometry of abelianbycylic groups.
Benson Farb*, University of Chicago
Lee Mosher, Rutgers University, Newark
(93520222)

Sunday September 13, 1998, 8:30 a.m.10:50 a.m.
Special Session on Stochastic Analysis, III
Room 8009, DePaul Center
Organizers:
Richard B. Sowers, University of IllinoisUrbana rsowers@math.uiuc.edu
Elton P. Hsu, Northwestern University elton@math.nwu.edu

8:30 a.m.
A class of multiscale processes and their phase changes with time.
Rabi Bhattacharya*, Indiana University
(9356099)

9:00 a.m.
On the mixing rate of the Lagrangian velocity field .
Craig L Zirbel*, Bowling Green State University
(93560102)

9:30 a.m.
Homogenization for HamiltonJacobi PDEs with random Hamiltonian.
Fraydoun Rezakhanlou*, UC Berkeley
(93560226)

10:00 a.m.
YangMills fields and random holonomy in small geodesic balls.
Robert O Bauer*, Georgia Institute of Technology
(9356057)

10:30 a.m.
Anisotropic Stochastic Growth Models on Trees .
Steven P Lalley*, Purdue University
(93560120)

Sunday September 13, 1998, 8:30 a.m.10:50 a.m.
Special Session on Topics in Mathematics and Curriculum Reform, III
Room 8012, DePaul Center
Organizers:
Richard J Maher, Loyola University Chicago rjm@math.luc.edu

8:30 a.m.
Exactly What Parts Of The Sky Are Falling?
Richard J Maher*, Loyola University Chicago
(93598124)

9:00 a.m.
Quantitative Reasoning: A New Math Course for a New Century.
Carolyn Narasimhan, DePaul University
David Jabon*, DePaul University
(9359849)

9:30 a.m.
The Role of the History of Mathematics in the Reform Movement.
Herbert E. Kasube*, Bradley University
(9359837)

10:00 a.m.
A geometry course for prospective secondary school teachers.
Jeff Connor*, Ohio University
Barbara Grover, Ohio University
(9359820)

10:30 a.m.
Curricular Options for Undergraduate Topology.
Stephan C. Carlson*, RoseHulman Inst. of Tech.
(9359862)

Sunday September 13, 1998, 8:30 a.m.10:50 a.m.
Special Session on Ergodic Theory and Topological Dynamics, III
Room 1007, Lewis Center
Organizers:
Roger L. Jones, DePaul University rjones@condor.depaul.edu
Randall McCutcheon, Wesleyan College cutch@claude.math.wesleyan.edu

8:30 a.m.
Differential and ergodic transforms.
Roger L. Jones*, DePaul University
Joseph Rosenblatt, University of Illinois at Urbana
(9352638)

9:00 a.m.
Multiple mixing for rank one group actions.
Andres del Junco*, University of Toronto
Reem Yassawi, McGill University
(9352878)

10:00 a.m.
Even Kakutani Equivalence via $\vec\alpha$ and $\vec\beta$ equivalences in two dimensions.
Kyewon Koh Park, Ajou University
Ay\c se A. \c Sahin*, North Dakota State University
(93528164)

10:30 a.m.
Coboundaries for commuting transformations.
Isaac Kornfeld*, North Dakota State University
(93528151)

Sunday September 13, 1998, 9:00 a.m.10:50 a.m.
Special Session on Algebraic Coding, III
Room 8014, DePaul Center
Organizers:
William C. Huffman, Loyola University of Chicago wch@math.luc.edu
Vera S. Pless, University of Illinois at Chicago pless@math.uic.edu

9:00 a.m.
An application of semigroup rings to coding theory.
Jay A. Wood*, Purdue University Calumet
(93594110)

9:30 a.m.
Type II codes over finite rings and finite abelian groups, and an application to hermitian modular forms.
Eiichi Bannai*, Kyushu University
(93505154)

10:00 a.m.
Codes over F2+uF2: a survey.
Patrick Solé*, CNRS, I3S
(9350581)

10:30 a.m.
The weight distribution of the quaternary Kasami code.
Tor Helleseth*, University of Bergen, Norway
P Vijay Kumar, University of Southern California
Halvard Martinsen, University of Bergen, Norway
Odd Narve Vassbakk, University of Bergen, Norway
(93594182)

Sunday September 13, 1998, 9:00 a.m.10:40 a.m.
Special Session on KTheory and Motivic Cohomology, III
Room 1114, Lewis Center
Organizers:
Kevin Knudson, Northwestern University knudson@math.nwu.edu
Mark Walker, University of NebraskaLincoln mwalker@math.unl.edu

9:00 a.m.
$K$theory of complex varieties.
Claudio Pedrini, Universita di Genova
Charles A. Weibel*, Rutgers University
(93519173)

10:00 a.m.
On the category of mixed elliptic motives.
Owen Patashnick*, University of Chicago
(93514228)

Sunday September 13, 1998, 9:00 a.m.10:50 a.m.
Special Session on Complexity of Geometric Structures on Manifolds, II
Room 1006, Lewis Center
Organizers:
Melvin G. Rothenberg, University of Chicago mel@math.uchicago.edu
Shmuel A. Weinberger, University of Chicago shmuel@math.uchicago.edu

9:00 a.m.
Algorithmic aspects of some topological problems.
Alexander Nabutovsky, Univeristy of Toronto
Shmuel Weinberger*, University of Chicago
(9355773)

9:30 a.m.
Variational problems for Riemannian functionals and arithmetic groups.
Alexander Nabutovsky*, University of Toronto
Shmuel Weinberger, University of Chicago
(9355342)

10:00 a.m.
Towers of Coverings and $L^2$ Invariants.
Bryan F. Clair*, CUNY Graduate Center
(93558170)

10:30 a.m.
The Minimal Genus Problem in a Symplectic FourManifold .
Peter S Ozsvath*, IAS
Zoltan Szabo, Princeton University
(9355746)

Sunday September 13, 1998, 9:00 a.m.10:45 a.m.
Special Session on Complex Dynamics, III
Room 1405, Lewis Center
Organizers:
Shmuel Friedland, University of Illinois at Chicago friedlan@uic.edu

9:00 a.m.
Siegel groups in dimension three.
Pedro J Freitas, University of Illinois at Chicago
Shmuel Friedland*, University of Illinois at Chicago
(93532147)

10:00 a.m.
Friedland's entropy for commuting maps.
William Geller*, Indiana U.Purdue U. Indpls.
Mark Pollicott, Manchester University
(93558227)

Sunday September 13, 1998, 9:00 a.m.10:50 a.m.
Special Session on Number Theory, III
Room 1536, Lewis Center
Organizers:
Jeremy T Teitelbaum, University of Illinois at Chicago jeremy@math.uic.edu
Yuri Tschinkel, University of Illinois at Chicago yuri@math.uic.edu

9:00 a.m.
Deformations of three dimensional Galois representations.
Darrin M Doud*, University of Illinois
(93511184)

9:30 a.m.
Galois actions on trees.
Nigel Boston*, University of Illinois
(93511140)

10:00 a.m.
Steinberg Bundles.
Jeremy T Teitelbaum*, U of I Chicago
(93511162)

10:30 a.m.
Some Examples of Algebraic Modular Forms.
David Pollack*, The Ohio State University
Joshua Lansky, University of Rochester
(93511178)

Sunday September 13, 1998, 9:00 a.m.10:50 a.m.
Special Session on Orthogonal Polynomial Series, Summability and Conjugates, II
Room 1410, Lewis Center
Organizers:
Calixto P. Calderon, University of Illinois at Chicago cpc@uic.edu
Luis A. Caffarelli, University of Texas at Austin caffarel@math.utexas.edu

Sunday September 13, 1998, 9:00 a.m.10:40 a.m.
Special Session on Algebraic Geometry and Mirror Symmetry, III
Room 1109, Lewis Center
Organizers:
Ezra Getzler, Northwestern University getzler@math.nwu.edu
Mikhail Kapranov, Northwestern University kapranov@math.nwu.edu
Sheldon Katz, Oklahoma State University katz@math.okstate.edu

9:00 a.m.
Higher products on elliptic curves.
Alexander Polishchuk*, Harvard University
(9351476)

10:00 a.m.
Chern classes and periods of mirrors.
Anatoly Libgober*, University of Illinois at Chicago
(93514148)

Sunday September 13, 1998, 9:00 a.m.10:50 a.m.
Special Session on Nonlinear Partial Differential Equations, III
Room 1014, Lewis Center
Organizers:
GuiQiang Chen, Northwestern University gqchen@math.nwu.edu
Konstantina Trivisa, Northwestern University trivisa@math.nwu.edu

9:00 a.m.
Shock Waves , General Relativity, and Astrophysics.
Joel A Smoller*, University of Michigan
(9353587)

9:30 a.m.
Boundary formation in linear elasticity.
Michael Renardy*, Virginia Tech
David L Russell, Virginia Tech
(9353589)

10:00 a.m.
Macroscopic Dynamics of Electrorheological Suspensions.
Markos A. Katsoulakis*, University of Massachusetts
Fernando Reitich, University of Minnesota
(93535216)

10:30 a.m.
Liouville theorems for the degenerate Laplace equations and their applications.
James Serrin, School of Mathematics, University of Minnesota
Henghui Zou*, Department of Mathematics, University of Alabama at Birmingham
(93535211)

Sunday September 13, 1998, 9:30 a.m.10:50 a.m.
Special Session on Fourier Analysis, III
Room 1312, Lewis Center
Organizers:
Marshall Ash, DePaul University mash@math.depaul.edu
Mark A. Pinsky, Northwestern University pinsky@math.nwu.edu

9:30 a.m.
The Gibbs(Wilbraham) PhenomenonA brief Update, Filtering and Bounds for Some Wavelets Expansion. Preliminary report.
Abdul J. Jerri*, Clarkson University
(93542139)

10:30 a.m.
Geometric Transplantation Formulas for Spherical Functions.
William O. Bray*, University of Maine
(93542136)

Sunday September 13, 1998, 11:00 a.m.11:50 a.m.
Invited Address
Number theory, combinatorics and ergodic theorems along polynomials
Room 241, Lewis Center
Vitaly Bergelson*, Ohio State University

Sunday September 13, 1998, 1:30 p.m.2:20 p.m.
Invited Address
The mathematics and physics of mirror symmetry
Room 241, Lewis Center
Sheldon Katz*, Oklahoma State University

Sunday September 13, 1998, 3:00 p.m.4:20 p.m.
Special Session on Algebraic Coding, IV
Room 8014, DePaul Center
Organizers:
William C. Huffman, Loyola University of Chicago wch@math.luc.edu
Vera S. Pless, University of Illinois at Chicago pless@math.uic.edu

3:00 p.m.
Recent progress in the algebraicgeometric approach to codes over rings.
Judy L Walker*, University of Nebraska
(93594219)

3:30 p.m.
Optimal binary linear codes obtained from regular partitions of vector spaces.
David B Jaffe*, Univ. of Nebraska  Lincoln
(93594206)

4:00 p.m.
On the classification of even extremal formally selfdual codes .
Joe E. Fields, University of Illinois at Chicago
Philippe Gaborit*, INRIA  University of Illinois at Chicago
William C. Huffman, Loyola University
Vera Pless, University of Illinois at Chicago
(93505130)

Sunday September 13, 1998, 3:00 p.m.5:40 p.m.
Special Session on KTheory and Motivic Cohomology, IV
Room 1114, Lewis Center
Organizers:
Kevin Knudson, Northwestern University knudson@math.nwu.edu
Mark Walker, University of NebraskaLincoln mwalker@math.unl.edu

3:00 p.m.
The Chow ring and motivic cohomology of classifying spaces .
Burt Totaro*, University of Chicago
(93519174)

4:00 p.m.
A conjecture of Deline on onemotives.
Niranjan Ramachandran*, University of Michigan
(93519213)

5:00 p.m.
An explicit description of the Dennis trace map.
Miriam Ruth Kantorovitz*, University of Illinois at UrbanaChampaign
Claudia Miller, University of Michigan
(93519150)

Sunday September 13, 1998, 3:00 p.m.4:20 p.m.
Special Session on Fourier Analysis, IV
Room 1312, Lewis Center
Organizers:
Marshall Ash, DePaul University mash@math.depaul.edu
Mark A. Pinsky, Northwestern University pinsky@math.nwu.edu

3:00 p.m.
The harmonic analysis of a hypergroup depends on its center.
Alan L Schwartz*, University of MissouriSt. Louis
Olivier Gebuhrer, Universite Louis Pasteur, Strasbourg, France
(9354321)

3:30 p.m.
On Sobolev spaces of fractional order and $\varepsilon$families of operators on spaces of homogeneous type.
A. E. Gatto, DePaul University
S. V\'{a}gi*, DePaul University
(93542192)

4:00 p.m.
Weak type estimates for cone multipliers on $H^{p}$ spaces, $p < 1$.
Sunggeum Hong*, University of WisconsinMadison
(9354240)

Sunday September 13, 1998, 3:00 p.m.4:20 p.m.
Special Session on Complexity of Geometric Structures on Manifolds, III
Room 1006, Lewis Center
Organizers:
Melvin G. Rothenberg, University of Chicago mel@math.uchicago.edu
Shmuel A. Weinberger, University of Chicago shmuel@math.uchicago.edu

3:00 p.m.
Cyclic surgery, degrees of maps of character curves, and volume rigidity for hyperbolic manifolds.
Nathan M. Dunfield*, University of Chicago
(9355771)

3:30 p.m.
Small Dehn Surgeries, Part II.
Steve Boyer, UQAM, Montreal, Canada
Marc Culler*, UIC, Chicago, IL
Peter B Shalen, UIC, Chicago, IL
Xingru Zhang, SUNY, Buffalo, NY
(93557105)

4:00 p.m.
Small Dehn Fillings, I.
Steven P. Boyer, University of Quebec at Montreal
Marc Culler, University of Illinois at Chicago
Peter B Shalen*, University of Illinois at Chicago
Xingru Zhang, Oklahoma State University
(93557103)

Sunday September 13, 1998, 3:00 p.m.4:50 p.m.
Special Session on Ergodic Theory and Topological Dynamics, IV
Room 1007, Lewis Center
Organizers:
Roger L. Jones, DePaul University rjones@condor.depaul.edu
Randall McCutcheon, Wesleyan College cutch@claude.math.wesleyan.edu

3:00 p.m.
Processes which are one sidedly isomorphic to a Bernoulli shift.
Christopher E Hoffman*, University of Maryland
(9352872)

3:30 p.m.
$T,T^{1}$ is not standard.
Deborah W Heicklen*, Berkeley
Christopher E Hoffman, University of Maryland
(9352883)

4:00 p.m.
Uncommon Types of Mixing.
Terrence M Adams*, Rhode Island College
(93528194)

4:30 p.m.
Weakly mixing of all orders along generalized polynomials.
Inger Johanne H\aa land*, Agder College, Norway
(93528201)

Sunday September 13, 1998, 3:00 p.m.3:45 p.m.
Special Session on Complex Dynamics, IV
Room 1405, Lewis Center
Organizers:
Shmuel Friedland, University of Illinois at Chicago friedlan@uic.edu

3:00 p.m.
Translation invariant Julia sets.
David A Boyd*, Purdue University
(93530171)

Sunday September 13, 1998, 3:00 p.m.4:50 p.m.
Special Session on Number Theory, IV
Room 1536, Lewis Center
Organizers:
Jeremy T Teitelbaum, University of Illinois at Chicago jeremy@math.uic.edu
Yuri Tschinkel, University of Illinois at Chicago yuri@math.uic.edu

3:00 p.m.
Equivariant Tamagawa Numbers.
Matthias Flach*, Caltech
David Burns, King's College
(9350665)

3:30 p.m.
ABC inequalities for some moduli spaces of log general type .
Minhyong Kim*, University of Arizona
(9351136)

4:00 p.m.
A bound on elliptic curves with exceptional primes.
David R. Grant*, University of Colorado at Boulder
(9351166)

4:30 p.m.
Semistable reduction in characteristic 0.
Dan Abramovich*, Boston University
Kalle Karu, Boston University
(9351454)

Sunday September 13, 1998, 3:00 p.m.6:00 p.m.
Special Session on Rigidity in Geometry and Dynamics, IV
Room 1008, Lewis Center
Organizers:
Steven E Hurder, University of Illinois at Chicago hurder@uic.edu
Ralf J. Spatzier, University of Michigan spatzier@math.lsa.umich.edu

3:00 p.m.
Ergodicity of skew products.
Keith Burns*, Northwestern University
Amie Wilkinson, Northwestern University
(93558137)

3:30 p.m.
Fundamental groups of compact manifolds and symmetric geometry of noncompact type.
Alberto Candel, California Institute of Technology
Raul Quiroga*, CINVESTAVIPN
(93553175)

4:00 p.m.
Finiteness and rigidity for complete Kahler manifolds.
Mohan Ramachandran*, SUNY at Buffalo
(93558215)

4:30 p.m.
Cartan geometries and superrigidity.
Renato Feres*, Washington University, St. Louis
(93553161)

5:00 p.m.
Cartan decomposition subgroups and compact quotients of SO(2,n)/H.
Hee Oh*, University of Chicago
Dave Witte, Oklahoma State University
(93522231)

5:30 p.m.
Asymptotics for the number of saddle connections for a quadratic differential.
Howard Masur*, University of Illinois at Chicago
(93522240)

Sunday September 13, 1998, 3:00 p.m.5:50 p.m.
Special Session on Algebraic Combinatorics: Association Schemes and Related Topics, IV
Room 8005, DePaul Center
Organizers:
Sung Yell Song, Iowa State University sung@math.iastate.edu

3:00 p.m.
Leonard systems and the qRacah polynomials.
Paul M Terwilliger*, Math Dept. University of Wisconsin, Madison, WI
(93505225)

3:30 p.m.
Tight distanceregular graphs.
Aleksandar Juri\v{s}i\'{c}*, IMFM
Jack Koolen, University of Eindhoven
Paul Terwilliger, University of Wisconsin
(93505159)

4:00 p.m.
The Terwilliger Algebra of the Hypercube $Q_D$.
Junie T. Go*, University of WisconsinMadison
(93505186)

4:30 p.m.
A Generalization of the Terwilliger Algebra .
Eric S Egge*, University of Wisconsin at Madison
(93505158)

5:00 p.m.
Tiling the integers with translates of one finite set.
Aaron D. Meyerowitz*, Florida Atlantic University
Ethan M. Coven, Wesleyan University
(93505223)

5:30 p.m.
On wreath product of commutative association schemes.
SungYell Song*, Iowa State University
(93505157)

Sunday September 13, 1998, 3:00 p.m.6:20 p.m.
Special Session on Nonlinear Partial Differential Equations.
Room 1014, Lewis Center
Organizers:
GuiQiang Chen, Northwestern University gqchen@math.nwu.edu
Konstantina Trivisa, Northwestern University trivisa@math.nwu.edu

3:00 p.m.
Large amplitude nonlinear acoustic waves without shocks.
Rodolfo R Rosales*, MIT
(93535209)

3:30 p.m.
The Onset of Chaos in Vortex Sheet RollUp.
Robert Krasny*, University of Michigan
Monika Nitsche, Tufts University
(93576107)

4:00 p.m.
Continuum mechanics, exterior calculus, and hyperelasticity.
David H Wagner*, University of Houston
(93573217)

4:30 p.m.
Mathematical Modeling of Frontal Polymerization.
Vladimir A Volpert*, Northwestern University
(93535200)

5:00 p.m.
Interface Dynamics in Microstructure Evolution .
Qing Nie*, Dept. of Math. , U. of Chicago
(93565212)

5:30 p.m.
A Unified Construction of Variational Methods for the Nonlinear Schr\"odinger Equation.
Alexander L. Zubarev*, Department of Physics, Purdue University, West Lafayette, IN 47907
Yeong E. Kim, Department of Physics, Purdue University, West Lafayette, IN 479071397
(9358250)

6:00 p.m.
Blowup of Solutions to Semilinear Wave Equations in High Space Dimensions.
Hengli Jiao*, Jackson
(93535153)
Inquiries: meet@ams.org