AMS Sectional Meeting Full Program

Current as of Tuesday, April 12, 2005 15:09:49

Program | Deadlines | Registration/Housing/Etc. | Inquiries: meet@ams.org

1998 Fall Central Section Meeting
Chicago, IL, September 12-13, 1998
Meeting #935

Associate secretaries:
Susan J Friedlander, AMS susan@math.northwestern.edu

Saturday September 12, 1998

Saturday September 12, 1998, 7:30 a.m.-5:00 p.m.
Meeting Registration
Lobby (8th floor), Lewis Center

Saturday September 12, 1998, 7:30 a.m.-5:00 p.m.
Exhibit and Book Sale
Lobby (8th floor), Lewis Center

Saturday September 12, 1998, 8:30 a.m.-10:50 a.m.
Special Session on Ergodic Theory and Topological Dynamics, I
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.
  Joint ergodicity along sequences of intervals.
  Sergey G Butkevich*, The Ohio State University
  (935-28-214)
- 9:00 a.m.
  The Worst Sums in Ergodic Theory.
  Mustafa Akcoglu, University of Toronto
  Roger Jones, DePaul University
  Joseph Rosenblatt*, University of Illinois
  Mate Wierdl, University of Memphis
  (935-28-34)
- 9:30 a.m.
  Ergodicity and periodic orbits for billiards in polygons.
  Eugene Gutkin*, USC
  (935-58-17)
- 10:00 a.m.
  The Uncertainty Principle for Polygonal Billiards and Geodesics on the Surface of Polyhedra.
  Gregory Galperin*, Eastern Illinois University
  (935-58-167)
- 10:30 a.m.
  Rotation numbers for maps of the $n$-od.
  Alexander Blokh, University of Alabama in Birmingham
  Michal Misiurewicz*, IUPUI
  (935-58-188)

Saturday September 12, 1998, 8:30 a.m.-10:50 a.m.
Special Session on Commutative Algebra, I
Room 1115, Lewis Center
Organizers:
Irena V. Peeva, Massachusetts Institute of Technology irena@math.mit.edu
Michael Stillman, Cornell University mike@math.cornell.edu
- 8:30 a.m.
  A criterion for equality of radicals of ideals, and some applications.
  Alexandre B Tchernev*, Purdue University
  (935-13-181)
- 9:00 a.m.
  Permanental Ideals.
  Reinhard C Laubenbacher*, New Mexico State University
  Irena Swanson, New Mexico State University
  (935-13-180)
- 9:30 a.m.
  Codimension three subcanonical schemes.
  David Eisenbud, University of California at Berkeley
  Sorin E Popescu*, Columbia University
  Charles Walter, Universite de Nice, France
  (935-14-220)
- 10:00 a.m.
  Algebraic Fundamental Group of a Curve Singularity.
  Hema Srinivasan*, University of Missouri-Columbia
  Steven D Cutkosky, University of Missouri
  (935-13-27)
- 10:30 a.m.
  Indecomposable Gorenstein Modules of Odd Rank.
  Christel Rotthaus, Michigan State University
  Dana Weston, University of Missouri
  Roger Wiegand*, University of Nebraska
  (935-13-144)

Saturday September 12, 1998, 8:30 a.m.-10:50 a.m.
Special Session on Algebraic Combinatorics: Association Schemes and Related Topics, I
Room 8005, DePaul Center
Organizers:
Sung Yell Song, Iowa State University sung@math.iastate.edu
- 8:30 a.m.
  Coherent configurations and $2$-distance sets in real Euclidean spaces.
  Eiichi Bannai*, Kyushu University
  Etsuko Bannai, Kyushu University
  (935-05-125)
- 9:00 a.m.
  Quotients of coherent configurations.
  Alyssa D Sankey*, Slippery Rock University
  (935-05-149)
- 9:30 a.m.
  Completely regular codes in Hamming graphs.
  William J. Martin*, University of Winnipeg
  Tara D. Taylor, University of Winnipeg
  (935-05-236)
- 10:00 a.m.
  Tight 2-designs and perfect 1-codes in Doob graphs.
  Akihiro Munemasa*, Kyushu University
  Jacobus Hendricus Koolen, Kyushu University
  (935-05-155)
- 10:30 a.m.
  Applying combinatorics of finite geometry to algebraic topology.
  Stephen D Smith*, University of Illinois at Chicago
  (935-05-39)

Saturday September 12, 1998, 9:00 a.m.-10:50 a.m.
Special Session on Stochastic Analysis, I
Room 8009, DePaul Center
Organizers:
Richard B. Sowers, University of Illinois-Urbana r-sowers@math.uiuc.edu
Elton P. Hsu, Northwestern University elton@math.nwu.edu
- 9:00 a.m.
  Dirichlet functions, random walks, spanning forests, and percolation.
  Russell D Lyons*, Indiana University
  (935-60-94)
- 9:30 a.m.
  Some laws of the iterated logarithm for functionals of Harris recurrent Markov chains.
  Xia Chen*, Case Western Reserve University
  (935-60-28)
- 10:00 a.m.
  One-dimensional interacting particle systems with spatially-inhomogeneous flip rates.
  Shirin Joy Handjani*, The University of Mississippi
  (935-60-100)
- 10:30 a.m.
  Some central limit theorems for the motion of a tagged particle in the simple exclusion process.
  Sunder Sethuraman*, Iowa State Univ.
  Horng-Tzer Yau, Courant Inst.
  Srinivasa Varadhan, Courant Inst.
  (935-60-117)

Saturday September 12, 1998, 9:00 a.m.-10:50 a.m.
Special Session on Topics in Mathematics and Curriculum Reform, I
Room 8012, DePaul Center
Organizers:
Richard J Maher, Loyola University Chicago rjm@math.luc.edu
- 9:00 a.m.
  Mathematicians and Mathematics Education.
  John Baldwin*, University of Illinois at Chicago
  (935-98-59)
- 9:30 a.m.
  Computer Lab On Wheels.
  James R. Olsen*, Western Illinois University
  (935-98-82)
- 10:00 a.m.
  Calculus for the Liberal Arts Student.
  Richard A Gillman*, Valparaiso University
  (935-98-25)
- 10:30 a.m.
  Historical, philosophical, and cognitive considerations of students' conception of proof.
  Guershon Harel*, Purdue University
  (935-98-44)

Saturday September 12, 1998, 9:00 a.m.-10:45 a.m.
Special Session on Algebraic Coding, I
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.
  Lower bounds on code invaritants.
  A. Ashikhmin, Los Alamos Natl. Lab.
  A. Barg*, Bell Labs
  (935-94-210)
- 9:30 a.m.
  An improved upper bound on the minimum distance of doubly-even self-dual codes.
  Simon Litsyn*, Tel Aviv University
  (935-94-84)
- 10:00 a.m.
  The Mysterious Turbo Codes.
  Robert J. McEliece*, California Institute of Technology
  (935-94-237)

Saturday September 12, 1998, 9:00 a.m.-10:40 a.m.
Special Session on K-Theory and Motivic Cohomology, I
Room 1114, Lewis Center
Organizers:
Kevin Knudson, Northwestern University knudson@math.nwu.edu
Mark Walker, University of Nebraska-Lincoln mwalker@math.unl.edu
- 9:00 a.m.
  Transfer Maps and Algebraic K-theory.
  Bruce Williams*, U. of Notre Dame
  (935-19-195)
- 10:00 a.m.
  An isomorphism between Bredon and Quinn homology and the K-theoretic Isomorphism Conjecture.
  Robert N Talbert*, Bethel College (IN)
  (935-19-118)

Saturday September 12, 1998, 9:00 a.m.-10:50 a.m.
Special Session on Complexity of Geometric Structures on Manifolds, I
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.
  Discrete groups acting on compact manifolds .
  Benson Farb*, University of Chicago
  Peter Shalen, University of Illinois at Chicago
  (935-57-224)
- 9:30 a.m.
  Functional Integrals and Vassiliev Invariants
  Louis H. Kauffman*, University of Illinois at Chicago
  (935-55-129)
- 10:00 a.m.
  Positive Scalar Curvature for Complete Manifolds of Bounded Geometry.
  Kevin M Whyte*, Univ. of Utah
  (935-57-204)
- 10:30 a.m.
  Counterexamples to the Equivariant Borel Conjecture.
  Nadya K Shirokova*, University of Illinois, Urbana-Champaigne
  (935-51-106)

Saturday September 12, 1998, 9:00 a.m.-10:45 a.m.
Special Session on Complex Dynamics, I
Room 1405, Lewis Center
Organizers:
Shmuel Friedland, University of Illinois at Chicago friedlan@uic.edu
- 9:00 a.m.
  The Mandelbrot Set for the Complex Henon Map.
  John E Fornaess, University of Michigan
  Estela A Gavosto*, University of Kansas
  (935-32-47)
- 10:00 a.m.
  Dessins d'enfants and Hubbard trees.
  Kevin M Pilgrim*, Univ. of Missouri, Rolla
  (935-11-16)

Saturday September 12, 1998, 9:00 a.m.-10:50 a.m.
Special Session on Number Theory, I
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.
  Simultaneous Diagonal Inequalities .
  Scott T Parsell*, University of Michigan
  (935-11-23)
- 10:00 a.m.
  Arithmetic torsors.
  Yuri Tschinkel*, Univ. of Illinois at Chicago
  (935-11-132)
- 10:30 a.m.
  On simultaneous diophantine approximation in $\alpha{\Bbb Q} + {\Bbb Q}$.
  Edward B Burger*, Williams College and The University of Colorado at Boulder
  (935-11-56)

Saturday September 12, 1998, 9:00 a.m.-10:50 a.m.
Special Session on Rigidity in Geometry and Dynamics, I
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.
  Projective factors of group actions with stationary measure.
  Robert J. Zimmer*, The University of Chicago
  (935-22-30)
- 10:30 a.m.
  Arithmetic Quotients adn Fundamental Groups of Manifolds Admitting Lattice Actions.
  David M Fisher*, University of Chicago
  (935-53-221)

Saturday September 12, 1998, 9:00 a.m.-10:40 a.m.
Special Session on Algebraic Geometry and Mirror Symmetry, I
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.
  The topological cup product on semiample hypersurfaces in toric varieties.
  Anvar R Mavlyutov*, University of Massachusetts at Amherst
  (935-14-196)
- 10:00 a.m.
  Compactifying the space of stable maps.
  Dan Abramovich*, Boston University
  Angelo Vistoli, Universita di Bologna
  (935-14-55)

Saturday September 12, 1998, 9:00 a.m.-10:50 a.m.
Special Session on Nonlinear Partial Differential Equations, I
Room 1014, Lewis Center
Organizers:
Gui-Qiang Chen, Northwestern University gqchen@math.nwu.edu
Konstantina Trivisa, Northwestern University trivisa@math.nwu.edu
- 9:00 a.m.
  Weak Continuity of Minors in Nonlinear Elasticity.
  Irene Fonseca*, Department of Mathematical Sciences, Carnegie Mellon University
  (935-35-92)
- 9:30 a.m.
  Undercompressive shocks in a model of thin film motion.
  Michael Shearer*, North Carolina State University
  (935-35-238)
- 10:00 a.m.
  Existence of Entropy Solutions to the Compressible Euler Equations.
  Philippe G. LeFloch*, Ecole Polytechnique
  (935-35-232)
- 10:30 a.m.
  Bifurcation of Nonclassical Viscous Shock Profiles from the Constant State.
  Arthur V. Azevedo, Universidade de Brasilia
  Dan Marchesin, Instituto de Matem\'atica Pura e Aplicada
  Bradley J. Plohr*, State University of New York at Stony Brook
  Kevin Zumbrun, Indiana University
  (935-35-203)

Saturday September 12, 1998, 9:30 a.m.-10:50 a.m.
Special Session on Fourier Analysis, I
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 $\bar\partial_b$ Complex on Certain Quadratic CR Submanifolds .
  Alexander J Nagel*, University of Wisconsin-Madison
  (935-42-93)
- 10:00 a.m.
  Central Mean Oscillation, Morrey Spaces, and Central Carleson Measures.
  Josefina Alvarez*, New Mexico State University
  Martha Guzman-Partida, Universidad Nacional Autonoma de Mexico
  Joseph Lakey, New Mexico State University
  (935-42-123)
- 10:30 a.m.
  Pseudo-differential operators and non-linear dispersive equations.
  Carlos E Kenig*, University of Chicago
  (935-35-199)

Saturday September 12, 1998, 11:00 a.m.-11:50 a.m.
Invited Address
Rigidity Phenomena in Geometry and Dynamics.
Room 241, Lewis Center
Ralf J Spatzier*, University of Michigan
(935-58-138)

Saturday September 12, 1998, 1:30 p.m.-2:20 p.m.
Invited Address
Motivic homotopy type?
Room 241, Lewis Center
Vladimir Voevodsky*, Northwestern University

Saturday September 12, 1998, 3:00 p.m.-5:50 p.m.
Special Session on Stochastic Analysis, II
Room 8009, DePaul Center
Organizers:
Richard B. Sowers, University of Illinois-Urbana r-sowers@math.uiuc.edu
Elton P. Hsu, Northwestern University elton@math.nwu.edu
- 3:00 p.m.
  Robustness of phase transition for general spherical models.
  Robin Pemantle*, Univ. of Wisconsin-Madison
  Jeff Steif, Math. Department, Chalmers Univ.
  (935-60-32)
- 3:30 p.m.
  Logarithmic Sobolev Inequality for Some Models of Random Walks.
  Tzong-Yow Lee*, University of Maryland
  Horng-Tzer Yau, New York University
  (935-60-35)
- 4:00 p.m.
  Stochastic Curvature Driven Flows.
  Nung Kwan Yip*, University of Wisonsin-Madison
  (935-60-95)
- 4:30 p.m.
  Doubly perturbed random walk and Brownian motion.
  Burgess J Davis*, Purdue University
  (935-60-31)
- 5:00 p.m.
  Martin Boundary and Integral Representations for Harmonic Functions of Symmetric Stable Processes.
  Zhen-Qing Chen, Cornell University
  Renming Song*, University of Illinois at Urbana-Chamapign
  (935-60-48)
- 5:30 p.m.
  Problems of Perturbation Theory.
  I H Dinwoodie*, Tulane University
  (935-60-63)

Saturday September 12, 1998, 3:00 p.m.-5:50 p.m.
Special Session on Topics in Mathematics and Curriculum Reform, II
Room 8012, DePaul Center
Organizers:
Richard J Maher, Loyola University Chicago rjm@math.luc.edu
- 3:00 p.m.
  How to Reinvigorate Undergraduate Mathematics Education.
  Jerry Uhl*, University of Illinois
  (935-98-51)
- 3:30 p.m.
  In Praise of Thales.
  Joseph J Rotman*, UniDepartment of Mathematics, University of Illinois, Urbana-Champaign
  (935-00-18)
- 4:00 p.m.
  Forging Connections Between Mathematics and Science General Education Courses.
  Janet L Andersen*, Hope College
  (935-98-101)
- 4:30 p.m.
  Problems that students must actually use calculus to solve.
  Charlene E. Beckmann*, Grand Valley State University
  (935-98-208)
- 5:00 p.m.
  Calculus assessment at the UIUC: The Indicators Project.
  Paul M Weichsel*, University of Illinois at Urbana-Champaign
  (935-98-52)
- 5:30 p.m.
  Fostering Effective Communication in Mathematics Classes as a Means for Improving Learning.
  Susan F Pustejovsky*, Alverno College
  (935-98-131)

Saturday September 12, 1998, 3:00 p.m.-5:00 p.m.
Special Session on Algebraic Coding, II
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.
  Some properties of geometric codes.
  Jennifer D. Key*, Clemson University, SC
  (935-05-127)
- 3:30 p.m.
  New Nonlinear Codes Constructed from Reed-Muller Codes.
  Xiang-dong Hou*, Wright State University
  (935-94-207)
- 4:00 p.m.
  The presence of the all-1 vector.
  Harold N. Ward*, University of Virginia
  (935-94-112)
- 4:30 p.m.
  Memorial for Ed Assmus

Saturday September 12, 1998, 3:00 p.m.-5:40 p.m.
Special Session on K-Theory and Motivic Cohomology, II
Room 1114, Lewis Center
Organizers:
Kevin Knudson, Northwestern University knudson@math.nwu.edu
Mark Walker, University of Nebraska-Lincoln mwalker@math.unl.edu
- 3:00 p.m.
  On the $K$-theory of elliptic curves.
  Kevin P. Knudson*, Northwestern University
  (935-19-122)
- 4:00 p.m.
  Algebras satisfying the condition of Hochschild-Kostant-Rosenberg and their topological Hochschild homology.
  Ayelet Lindenstrauss*, Indiana University
  Michael Larsen, Indiana University
  (935-19-165)
- 5:00 p.m.
  The lower algebraic K-theory of cocompact Fuchsian groups.
  Ethan Berkove, United States Military Academy
  Daniel Juan-Pineda, Instituto de Matem\'aticas-Unidad Morelia
  Kimberly Pearson*, Valparaiso University
  (935-19-116)

Saturday September 12, 1998, 3:00 p.m.-5:50 p.m.
Special Session on Fourier Analysis, II
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.
  Applications of weighted Laguerre transplantation theorems.
  George Gasper*, Northwestern University
  Walter Trebels, TU Darmstadt
  (935-42-86)
- 3:30 p.m.
  Regularity properties of wave propagation on conic manifolds.
  Detlef M\"uller, Christian-Albrechts-Universit\"at Kiel
  Andreas Seeger*, University of Wisconsin-Madison
  (935-42-75)
- 4:00 p.m.
  Nonuniqueness for a bounded, differentiable complete orthonormal system.
  Gang Wang*, DePaul University
  J Marshall Ash, DePaul University
  (935-42-74)
- 4:30 p.m.
  Convolution squares of measures on surfaces.
  Robert Kaufman*, University of Illinois at Urbana-Champaign
  (935-42-45)
- 5:00 p.m.
  Calderon reproducing formula and Hardy space theory on product spaces of stratified groups.
  Yongsheng Han, Auburn University
  Guozhen Lu*, Wright State University
  (935-42-104)
- 5:30 p.m.
  Grunsky Transformation for the upper half plane.
  Subhajit Ghosechowdhury*, University of Missouri
  (935-42-230)

Saturday September 12, 1998, 3:00 p.m.-5:50 p.m.
Special Session on Ergodic Theory and Topological Dynamics, II
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.
  $\Bbb Z^d$ Staircase Actions.
  Terrence Adams, Ohio State University
  Cesar E. Silva*, Williams College
  (935-28-191)
- 3:30 p.m.
  On Ergodic 2-to-1 Endomorphisms.
  Stanley J Eigen*, Northeastern University
  (935-28-176)
- 4:00 p.m.
  A problem in ergodic theory.
  Karin Reinhold*, University at Albany, SUNY
  (935-28-169)
- 4:30 p.m.
  Results in Polynomial Recurrence for Actions of Fields.
  Paul G. Larick*, Dept of Mathematics, The Ohio State University, Columbus, Ohio 43201
  (935-46-58)
- 5:00 p.m.
  An infinitary polynomial Hales-Jewett theorem.
  Randall G McCutcheon*, University of Maryland
  (935-05-121)
- 5:30 p.m.
  Recent problems I have not been able to solve.
  M\'at\'e Wierdl*, University of Memphis
  (935-28-77)

Saturday September 12, 1998, 3:00 p.m.-5:45 p.m.
Special Session on Complex Dynamics, II
Room 1405, Lewis Center
Organizers:
Shmuel Friedland, University of Illinois at Chicago friedlan@uic.edu
- 3:00 p.m.
  Universal holomorphic motion of a closed set in the Riemann sphere.
  Sudeb Mitra*, Cornell University
  (935-32-53)
- 4:00 p.m.
  Maps on $\bf{P}^2$ with the symmetries of the symmetric group $S_5$.
  Scott Crass*, Buffalo State College
  (935-51-172)
- 5:00 p.m.
  Remarks on complex dynamics.
  John E. Fornaess*, University of Michigan
  (935-32-241)

Saturday September 12, 1998, 3:00 p.m.-4:50 p.m.
Special Session on Number Theory, II
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.
  estimating the speed of the quadratic sieve.
  Daniel J. Bernstein*, University of Illinois at Chicago
  (935-11-29)
- 3:30 p.m.
  A $q$-analogue of Mahler Expansions.
  Keith Conrad*, Ohio State Univ.
  (935-11-168)
- 4:00 p.m.
  Elliptic curves over function fields.
  Douglas Ulmer*, University of Arizona
  (935-11-126)
- 4:30 p.m.
  Jordan's Theorem in Characteristic p.
  Michael J Larsen*, University of Indiana
  (935-11-90)

Saturday September 12, 1998, 3:00 p.m.-6:50 p.m.
Special Session on Commutative Algebra, II
Room 1115, Lewis Center
Organizers:
Irena V. Peeva, Massachusetts Institute of Technology irena@math.mit.edu
Michael Stillman, Cornell University mike@math.cornell.edu
- 3:00 p.m.
  Good and bad Koszul algebras.
  Jan-Erik Roos*, Department of Mathematics, Stockholm Universiy, Stockholm, Sweden
  (935-13-145)
- 3:30 p.m.
  On Cohen-Macaulay approximation.
  Jee Heub Koh*, Korea Institute for Advanced Study and Indiana University
  (935-13-141)
- 4:00 p.m.
  Strictly positive regular functions on compact real varieties.
  Eberhard Becker*, Universit\"at Dortmund
  (935-13-190)
- 4:30 p.m.
  Simultaneous Resolution.
  Steven D Cutkosky*, University of Missouri-Columbia
  (935-14-26)
- 5:00 p.m.
  Hilbert functions and homogeneous generic forms.
  Vesselin Gasharov*, Cornell University
  (935-13-202)
- 5:30 p.m.
  Annihilators and associated primes of local cohomology modules.
  Christel Rotthaus*, Michigan State University
  Markus Brodmann, Universit\"at Z\"urich
  Rodney Sharp, University of Sheffield
  (935-13-69)
- 6:00 p.m.
  The Chern polynomial of a three arrangement .
  Henry K Schenck*, Northeastern University
  (935-14-113)
- 6:30 p.m.
  Derivations and powers of ideals.
  Reinhold H\"ubl, University of Regensburg
  Irena Swanson*, New Mexico State University
  (935-13-146)

Saturday September 12, 1998, 3:00 p.m.-6:15 p.m.
Special Session on Rigidity in Geometry and Dynamics, II
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.
  H\"older Regularity of Horocycle Foliations.
  Marlies Gerber*, Indiana University
  Amie Wilkinson, Northwestern University
  (935-53-177)
- 3:30 p.m.
  Non-Smooth Dynamical Systems that Exhibit Hyperbolic Behavior.
  Marian Gidea*, Loyola University of Chicago
  (935-58-15)
- 4:00 p.m.
  Genuine partial hyperbolicity in a stably Bernoullian diffeomorphism.
  Michael Shub, IBM
  Amie Wilkinson*, Northwestern
  (935-58-229)
- 4:30 p.m.
  An open dense set of stably ergodic diffeomorphisms in a neighborhood of a non-ergodic one.
  Viorel Nitica*, University of Notre Dame
  Andrei Torok, Princeton University
  (935-58-166)
- 5:00 p.m.
  Rigidity of volume preserving partially hyperbolic actions of property (T) groups.
  Andrew T\"or\"ok*, Princeton University
  (935-58-61)
- 5:30 p.m.
  New results on rigidity of invariant measures for actions of higher rank abelian groups.
  Anatole Katok*, Pennsylvania State University
  (935-22-239)

Saturday September 12, 1998, 3:00 p.m.-5:50 p.m.
Special Session on Algebraic Combinatorics: Association Schemes and Related Topics, II
Room 8005, DePaul Center
Organizers:
Sung Yell Song, Iowa State University sung@math.iastate.edu
- 3:00 p.m.
  Combinatorial Inequalities for Quasi-polynomial Semilattices.
  Dijen K Ray-Chaudhuri*, Department of Mathematics The Ohio State University
  Jin Qian, Department of Mathematics The Ohio State University
  (935-05-156)
- 3:30 p.m.
  On Cayley graphs of 3-transposition groups.
  Norio Yamazaki*, Inperial College, London
  (935-05-183)
- 4:00 p.m.
  Superschemes and $t$-vertex Condition Graphs.
  Jerzy Wojdylo*, Southeast Missouri State University
  (935-05-96)
- 4:30 p.m.
  Association schemes with a nonsymmetric relation of valency two.
  Mitsugu Hirasaka*, Department of Mathematics and Computer Science, Bar-Ilan University
  Mikhail Muzychuk, Department of Mathematics and Computer Science, Bar-Ilan University
  (935-05-205)
- 5:00 p.m.
  A new inequality for bipartite distance-regular graphs.
  Michael Lang*, University of Wisconsin-Madison
  (935-05-218)
- 5:30 p.m.
  Distribution invariants of association schemes.
  Nachimuthu Manickam*, DePauw University
  (935-05-234)

Saturday September 12, 1998, 3:00 p.m.-5:30 p.m.
Special Session on Orthogonal Polynomial Series, Summability and Conjugates, I
Room 1410, Lewis Center
Organizers:
Calixto P. Calderon, University of Illinois at Chicago cpc@uic.edu
Calixto P. Calderon, University of Illinois at Chicago cpc@uic.edu
Luis A. Caffarelli, University of Texas at Austin caffarel@math.utexas.edu
Luis A. Caffarelli, University of Texas at Austin caffarel@math.utexas.edu
- 3:00 p.m.
  Difference Equations and Quantized Discriminants for $q$-Orthogonal Polynomials.
  Mourad E.H. Ismail*, University of South Florida
  (935-33-24)
- 3:40 p.m.
  poisson integrals for temperature functions.
  Elizabeth A Kochneff*, Hewitt Associates
  (935-40-133)
- 4:20 p.m.
  Singular integrals associated with surfaces of revolution.
  Sarah N Ziesler*, Dominican University
  (935-42-128)
- 5:00 p.m.
  On the Riesz Transforms for the Laguerre Semigroup.
  Cristian E. Gutierrez*, Department of Mathematics, Temple University, Philadelphia, PA, 19122
  (935-42-97)

Saturday September 12, 1998, 3:00 p.m.-4:40 p.m.
Special Session on Algebraic Geometry and Mirror Symmetry, II
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
- 3:00 p.m.
  Admissible Variations of Mixed Hodge Structure.
  Gregory J Pearlstein*, University of Massachusetts, Amherst
  Aroldo Kaplan, University of Masschusetts, Amherst
  (935-14-135)
- 4:00 p.m.
  Tessellations of Moduli Spaces and the Mosaic Operad.
  Satyan L Devadoss*, Johns Hopkins University
  (935-14-79)

Saturday September 12, 1998, 3:00 p.m.-6:20 p.m.
Special Session on Nonlinear Partial Differential Equations, II
Room 1014, Lewis Center
Organizers:
Gui-Qiang Chen, Northwestern University gqchen@math.nwu.edu
Konstantina Trivisa, Northwestern University trivisa@math.nwu.edu
- 3:00 p.m.
  A Proof of Existence of Perturbed Steady Transonic Shocks via a Free Boundary Problem .
  Suncica Canic, University of Houston
  Barbara Lee Keyfitz*, University of Houston
  Gary M. Lieberman, Iowa State University
  (935-35-60)
- 3:30 p.m.
  Fully nonlinear stochastic partial differential equations.
  Panagiotis E. Souganidis*, Department of Mathematics, University of Wisconsin
  (935-35-91)
- 4:00 p.m.
  On the asymptotic behavior of entropy solutions to hyperbolic conservation laws.
  Hermano Frid Neto*, Universidade Federal do Rio de Janeiro
  (935-35-114)
- 4:30 p.m.
  Relaxation to the equations of isothermal elastodynamics.
  Athanasios E. Tzavaras*, Univ. of Wisconsin
  (935-35-98)
- 5:00 p.m.
  Relaxation Approximations to PDEs.
  Shi Jin*, Georgia Institute of Technology
  Markos Katsoulakis, University of Massachusetts
  Zhouping Xin, Courant Institute
  (935-65-198)
- 5:30 p.m.
  Global Solutions and Asymptotic Behavior of Nonlinear Magnetohydrodynamics.
  Gui-Qiang Chen, Northwestern University
  Dehua Wang*, University of California at Santa Barbara
  (935-35-179)
- 6:00 p.m.
  Thin film equations: existence and properties of steady states.
  Richard S. Laugesen*, University of Illinois, Urbana--Champaign
  Mary C. Pugh, University of Pennsylvania
  (935-35-22)

Saturday September 12, 1998, 3:00 p.m.-4:10 p.m.
Session for Contributed Papers
Room to be announced, DePaul Center
- 3:00 p.m.
  An Invariance Principle for Triangular.
  Anthony D'Aristotile*, SUNY
  (935-60-134)
- 3:15 p.m.
  Enumerating Unordered Sets of Finite Size N.
  C. S. Felicitas*, Pan Asian Congress of Mathematicians(Amer&NY)
  (935-18-09)
- 3:30 p.m.
  Posets from Conjugacy Classes of Coxeter Groups.
  Robert V Gill*, University of Michigan
  (935-20-115)
- 3:45 p.m.
  Analytical functions and infinite-dimensional P-groups.
  Boris S Khots*, Compressor Controls Corporation
  (935-46-14)
- 4:00 p.m.
  The Hasse Principle Modulo $N$th Powers.
  Victor Scharaschkin*, University of Michigan
  (935-11-197)

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
  (935-13-160)
- 8:30 a.m.
  Mixed dominating matrices.
  Klaus G Fischer*, George Mason University
  (935-13-119)
- 9:00 a.m.
  A Theorem on Smoothness---Bass-Quillen, Chow Groups and Intersection Multiplicity of Serre.
  Sankar P. Dutta*, University of Illinois at Urbana-Champaign
  (935-13-64)
- 9:30 a.m.
  Sharper estimates for the Hilbert-Kunz function in dimension 2.
  Paul Monsky*, Brandeis University
  (935-13-10)
- 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
  (935-13-143)
- 10:30 a.m.
  Deviations of local homomorphisms and finiteness of Andr\'e-Quillen homology.
  Luchezar L. Avramov*, Purdue University
  (935-13-189)

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.
  Bose-Mesner automorphisms and sub-schemes.
  Chris D Godsil*, University of Waterloo
  (935-05-67)
- 8:30 a.m.
  Character Products and $Q$-Polynomial Group Association Schemes.
  Hiroshi Suzuki*, Department of Mathematics, International Christian University
  (935-05-85)
- 9:00 a.m.
  Integral table algebras and commutative association schemes with a nonsymmetric relation of valency 3.
  Harvey I. Blau*, Northern Illinois University
  (935-05-70)
- 9:30 a.m.
  Some Remarks on a Regular Thin Near 7-Gon.
  Andrew J Woldar*, Villanova University
  (935-05-187)
- 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.
  (935-05-109)
- 10:30 a.m.
  Superscheme Classes, Burnside Algebras, and Speed's Orbit Problem.
  Jonathan D. H. Smith*, Iowa State University
  (935-05-108)

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
  (935-58-88)
- 10:00 a.m.
  Some applications of the SL(2,R) action on Teichmuller space.
  Alex Eskin*, University of Chicago
  (935-22-233)
- 10:30 a.m.
  On the asymptotic geometry of abelian-by-cylic groups.
  Benson Farb*, University of Chicago
  Lee Mosher, Rutgers University, Newark
  (935-20-222)

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 Illinois-Urbana r-sowers@math.uiuc.edu
Elton P. Hsu, Northwestern University elton@math.nwu.edu
- 8:30 a.m.
  A class of multi-scale processes and their phase changes with time.
  Rabi Bhattacharya*, Indiana University
  (935-60-99)
- 9:00 a.m.
  On the mixing rate of the Lagrangian velocity field .
  Craig L Zirbel*, Bowling Green State University
  (935-60-102)
- 9:30 a.m.
  Homogenization for Hamilton-Jacobi PDEs with random Hamiltonian.
  Fraydoun Rezakhanlou*, UC Berkeley
  (935-60-226)
- 10:00 a.m.
  Yang-Mills fields and random holonomy in small geodesic balls.
  Robert O Bauer*, Georgia Institute of Technology
  (935-60-57)
- 10:30 a.m.
  Anisotropic Stochastic Growth Models on Trees .
  Steven P Lalley*, Purdue University
  (935-60-120)

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
  (935-98-124)
- 9:00 a.m.
  Quantitative Reasoning: A New Math Course for a New Century.
  Carolyn Narasimhan, DePaul University
  David Jabon*, DePaul University
  (935-98-49)
- 9:30 a.m.
  The Role of the History of Mathematics in the Reform Movement.
  Herbert E. Kasube*, Bradley University
  (935-98-37)
- 10:00 a.m.
  A geometry course for prospective secondary school teachers.
  Jeff Connor*, Ohio University
  Barbara Grover, Ohio University
  (935-98-20)
- 10:30 a.m.
  Curricular Options for Undergraduate Topology.
  Stephan C. Carlson*, Rose-Hulman Inst. of Tech.
  (935-98-62)

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
  (935-26-38)
- 9:00 a.m.
  Multiple mixing for rank one group actions.
  Andres del Junco*, University of Toronto
  Reem Yassawi, McGill University
  (935-28-78)
- 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
  (935-28-164)
- 10:30 a.m.
  Coboundaries for commuting transformations.
  Isaac Kornfeld*, North Dakota State University
  (935-28-151)

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
  (935-94-110)
- 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
  (935-05-154)
- 10:00 a.m.
  Codes over F2+uF2: a survey.
  Patrick Sol�*, CNRS, I3S
  (935-05-81)
- 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
  (935-94-182)

Sunday September 13, 1998, 9:00 a.m.-10:40 a.m.
Special Session on K-Theory and Motivic Cohomology, III
Room 1114, Lewis Center
Organizers:
Kevin Knudson, Northwestern University knudson@math.nwu.edu
Mark Walker, University of Nebraska-Lincoln mwalker@math.unl.edu
- 9:00 a.m.
  $K$-theory of complex varieties.
  Claudio Pedrini, Universita di Genova
  Charles A. Weibel*, Rutgers University
  (935-19-173)
- 10:00 a.m.
  On the category of mixed elliptic motives.
  Owen Patashnick*, University of Chicago
  (935-14-228)

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
  (935-57-73)
- 9:30 a.m.
  Variational problems for Riemannian functionals and arithmetic groups.
  Alexander Nabutovsky*, University of Toronto
  Shmuel Weinberger, University of Chicago
  (935-53-42)
- 10:00 a.m.
  Towers of Coverings and $L^2$ Invariants.
  Bryan F. Clair*, CUNY Graduate Center
  (935-58-170)
- 10:30 a.m.
  The Minimal Genus Problem in a Symplectic Four-Manifold .
  Peter S Ozsvath*, IAS
  Zoltan Szabo, Princeton University
  (935-57-46)

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
  (935-32-147)
- 10:00 a.m.
  Friedland's entropy for commuting maps.
  William Geller*, Indiana U.-Purdue U. Indpls.
  Mark Pollicott, Manchester University
  (935-58-227)

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
  (935-11-184)
- 9:30 a.m.
  Galois actions on trees.
  Nigel Boston*, University of Illinois
  (935-11-140)
- 10:00 a.m.
  Steinberg Bundles.
  Jeremy T Teitelbaum*, U of I Chicago
  (935-11-162)
- 10:30 a.m.
  Some Examples of Algebraic Modular Forms.
  David Pollack*, The Ohio State University
  Joshua Lansky, University of Rochester
  (935-11-178)

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
- 9:00 a.m.
  Discussion

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
  (935-14-76)
- 10:00 a.m.
  Chern classes and periods of mirrors.
  Anatoly Libgober*, University of Illinois at Chicago
  (935-14-148)

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:
Gui-Qiang 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
  (935-35-87)
- 9:30 a.m.
  Boundary formation in linear elasticity.
  Michael Renardy*, Virginia Tech
  David L Russell, Virginia Tech
  (935-35-89)
- 10:00 a.m.
  Macroscopic Dynamics of Electrorheological Suspensions.
  Markos A. Katsoulakis*, University of Massachusetts
  Fernando Reitich, University of Minnesota
  (935-35-216)
- 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
  (935-35-211)

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) Phenomenon-A brief Update, Filtering and Bounds for Some Wavelets Expansion. Preliminary report.
  Abdul J. Jerri*, Clarkson University
  (935-42-139)
- 10:30 a.m.
  Geometric Transplantation Formulas for Spherical Functions.
  William O. Bray*, University of Maine
  (935-42-136)

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 algebraic-geometric approach to codes over rings.
  Judy L Walker*, University of Nebraska
  (935-94-219)
- 3:30 p.m.
  Optimal binary linear codes obtained from regular partitions of vector spaces.
  David B Jaffe*, Univ. of Nebraska - Lincoln
  (935-94-206)
- 4:00 p.m.
  On the classification of even extremal formally self-dual 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
  (935-05-130)

Sunday September 13, 1998, 3:00 p.m.-5:40 p.m.
Special Session on K-Theory and Motivic Cohomology, IV
Room 1114, Lewis Center
Organizers:
Kevin Knudson, Northwestern University knudson@math.nwu.edu
Mark Walker, University of Nebraska-Lincoln mwalker@math.unl.edu
- 3:00 p.m.
  The Chow ring and motivic cohomology of classifying spaces .
  Burt Totaro*, University of Chicago
  (935-19-174)
- 4:00 p.m.
  A conjecture of Deline on one-motives.
  Niranjan Ramachandran*, University of Michigan
  (935-19-213)
- 5:00 p.m.
  An explicit description of the Dennis trace map.
  Miriam Ruth Kantorovitz*, University of Illinois at Urbana-Champaign
  Claudia Miller, University of Michigan
  (935-19-150)

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 Missouri-St. Louis
  Olivier Gebuhrer, Universite Louis Pasteur, Strasbourg, France
  (935-43-21)
- 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
  (935-42-192)
- 4:00 p.m.
  Weak type estimates for cone multipliers on $H^{p}$ spaces, $p < 1$.
  Sunggeum Hong*, University of Wisconsin-Madison
  (935-42-40)

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
  (935-57-71)
- 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
  (935-57-105)
- 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
  (935-57-103)

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
  (935-28-72)
- 3:30 p.m.
  $T,T^{-1}$ is not standard.
  Deborah W Heicklen*, Berkeley
  Christopher E Hoffman, University of Maryland
  (935-28-83)
- 4:00 p.m.
  Uncommon Types of Mixing.
  Terrence M Adams*, Rhode Island College
  (935-28-194)
- 4:30 p.m.
  Weakly mixing of all orders along generalized polynomials.
  Inger Johanne H\aa land*, Agder College, Norway
  (935-28-201)

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
  (935-30-171)

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
  (935-06-65)
- 3:30 p.m.
  ABC inequalities for some moduli spaces of log general type .
  Minhyong Kim*, University of Arizona
  (935-11-36)
- 4:00 p.m.
  A bound on elliptic curves with exceptional primes.
  David R. Grant*, University of Colorado at Boulder
  (935-11-66)
- 4:30 p.m.
  Semistable reduction in characteristic 0.
  Dan Abramovich*, Boston University
  Kalle Karu, Boston University
  (935-14-54)

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
  (935-58-137)
- 3:30 p.m.
  Fundamental groups of compact manifolds and symmetric geometry of noncompact type.
  Alberto Candel, California Institute of Technology
  Raul Quiroga*, CINVESTAV-IPN
  (935-53-175)
- 4:00 p.m.
  Finiteness and rigidity for complete Kahler manifolds.
  Mohan Ramachandran*, SUNY at Buffalo
  (935-58-215)
- 4:30 p.m.
  Cartan geometries and superrigidity.
  Renato Feres*, Washington University, St. Louis
  (935-53-161)
- 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
  (935-22-231)
- 5:30 p.m.
  Asymptotics for the number of saddle connections for a quadratic differential.
  Howard Masur*, University of Illinois at Chicago
  (935-22-240)

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 q-Racah polynomials.
  Paul M Terwilliger*, Math Dept. University of Wisconsin, Madison, WI
  (935-05-225)
- 3:30 p.m.
  Tight distance-regular graphs.
  Aleksandar Juri\v{s}i\'{c}*, IMFM
  Jack Koolen, University of Eindhoven
  Paul Terwilliger, University of Wisconsin
  (935-05-159)
- 4:00 p.m.
  The Terwilliger Algebra of the Hypercube $Q_D$.
  Junie T. Go*, University of Wisconsin-Madison
  (935-05-186)
- 4:30 p.m.
  A Generalization of the Terwilliger Algebra .
  Eric S Egge*, University of Wisconsin at Madison
  (935-05-158)
- 5:00 p.m.
  Tiling the integers with translates of one finite set.
  Aaron D. Meyerowitz*, Florida Atlantic University
  Ethan M. Coven, Wesleyan University
  (935-05-223)
- 5:30 p.m.
  On wreath product of commutative association schemes.
  Sung-Yell Song*, Iowa State University
  (935-05-157)

Sunday September 13, 1998, 3:00 p.m.-6:20 p.m.
Special Session on Nonlinear Partial Differential Equations.
Room 1014, Lewis Center
Organizers:
Gui-Qiang 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
  (935-35-209)
- 3:30 p.m.
  The Onset of Chaos in Vortex Sheet Roll-Up.
  Robert Krasny*, University of Michigan
  Monika Nitsche, Tufts University
  (935-76-107)
- 4:00 p.m.
  Continuum mechanics, exterior calculus, and hyperelasticity.
  David H Wagner*, University of Houston
  (935-73-217)
- 4:30 p.m.
  Mathematical Modeling of Frontal Polymerization.
  Vladimir A Volpert*, Northwestern University
  (935-35-200)
- 5:00 p.m.
  Interface Dynamics in Microstructure Evolution .
  Qing Nie*, Dept. of Math. , U. of Chicago
  (935-65-212)
- 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 47907-1397
  (935-82-50)
- 6:00 p.m.
  Blow-up of Solutions to Semilinear Wave Equations in High Space Dimensions.
  Hengli Jiao*, Jackson
  (935-35-153)

Inquiries: meet@ams.org

AMS Sectional Meeting Full Program

1998 Fall Central Section Meeting Chicago, IL, September 12-13, 1998 Meeting #935

Saturday September 12, 1998

Sunday September 13, 1998

1998 Fall Central Section Meeting
Chicago, IL, September 12-13, 1998
Meeting #935