AMS Sectional Meeting Full Program
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1998 Fall Western Section Meeting
Tucson, AZ, November 1315, 1998
Meeting #938
Associate secretaries:
Bernard Russo, AMS
brusso@math.uci.edu
Friday November 13, 1998

Friday November 13, 1998, 6:00 p.m.7:00 p.m.
Meeting Registration and AMS Book Sale and Exhibit
Lobby, Mathematics

Friday November 13, 1998, 7:00 p.m.7:50 p.m.
Invited Address
Universality of the distribution functions of random matrix theory.
Room 201, Physics & Atmospheric Sciences
Craig A. Tracy*, University of California, Davis

Friday November 13, 1998, 8:00 p.m.10:00 p.m.
Welcome Reception
Ventana Room, Marriott University Park
Saturday November 14, 1998

Saturday November 14, 1998, 8:00 a.m.5:00 p.m.
Meeting Registration and AMS Book Sale and Exhibit
Lobby, Mathematics

Saturday November 14, 1998, 8:00 a.m.10:45 a.m.
Special Session on Integrable Systems and Random Matrix Theory, I
Room 312, Physics & Atmospheric Sciences
Organizers:
K. TR McLaughlin, University of Arizona
Craig A. Tracy, University of California, Davis tracy@itd.ucdavis.edu

8:00 a.m.
On the asymptotic analysis of the Fredholm determinant related to the time dependent temperature correlation function of the Heisenberg XX0 ferromagnet.
Alexander R Its*, Indiana University  Purdue University Indianapolis
(9388190)

9:00 a.m.
Fredholm Determinants,Random Matrices and Integrable Perturbations.
Mark A Adler*, Brandeis Umiversity
(9386052)

10:00 a.m.
Distribution functions for random variables .
Estelle L. Basor*, California Polytechnic State University, San Luis Obispo, CA 93407
(9388251)

Saturday November 14, 1998, 9:00 a.m.10:50 a.m.
Special Session on Geometry and Lie Groups, I
Room 501, Mathematics
Organizers:
Samuel R. Evens, University of Arizona evens@math.arizona.edu
JiangHua Lu, University of Arizona jhlu@math.arizona.edu

9:00 a.m.
A triangularity result for associated varieties of highest weight modules.
William M. McGovern*, University of Washington
(9381727)

9:40 a.m.
Singular Loci of Schubert Varieties in a Generalized Flag Variety.
James B. Carrell*, University of British Columbia
(9381486)

10:20 a.m.
Patterns, Smoothness and Rational Smoothness of Schubert Varieties.
Sara C. Billey*, MIT
(93805104)

Saturday November 14, 1998, 9:00 a.m.10:50 a.m.
Special Session on Spectral Geometry and Its Applications, I
Room 402, Mathematics
Organizers:
Xianzhe Dai, University of Southern California xdai@math.usc.edu
Leonid Friedlander, University of Arizona friedlan@math.arizona.edu

9:00 a.m.
Singular SturmLiouville theory.
Rafe Mazzeo*, Stanford University
Robert McOwen, Northeastern University
(9385819)

9:40 a.m.
Analytic torsion and Rtorsion for manifolds with boundary.
Xianzhe Dai*, UCSB and USC
Hao Fang, Princeton University
(93858121)

10:20 a.m.
Spectrum of complete noncompact manifolds.
Jiaping Wang*, Cornell University
(9385815)

Saturday November 14, 1998, 9:00 a.m.10:50 a.m.
Special Session on Mathematics and Biology, I
Room 220, Physics & Atmospheric Sciences
Organizers:
Jim Cushing, University of Arizona cushing@math.arizona.edu
Shandelle M. Henson, University of Arizona henson@math.arizona.edu

9:00 a.m.
Hamiltonian Limits and Subharmonic Resonance in Ecological Models: I. From the Pendulum \dots.
William M. Schaffer*, Department of Ecology and Evolutionary Biology and Program in Applied Mathematics, University of Arizona.
Aaron A. King, Program in Applied Mathematics, University of Arizona
(9389275)

9:30 a.m.
Hamiltonian Limits and Subharmonic Resonance in Ecological Models: II. \dots to the Lynx and the Hare.
Aaron A. King*, Program in Applied Mathematics, University of Arizona
William M. Schaffer, Department of Ecology and Evolutionary Biology and Program in Applied Mathematics, University of Arizona.
(9389276)

10:00 a.m.
Variations on the complex formation approach in modeling predator prey relations, mating, and sexual disease transmission.
Horst R. Thieme*, Arizona State University
Jinling Yang, Arizona State University
(9389237)

10:30 a.m.
How to Construct Better HighDimensional Population Models.
Yang Kuang*, ASU
(9389233)

Saturday November 14, 1998, 9:00 a.m.10:40 a.m.
Special Session on Classical and Quantum Mechanical Lattice Spin Systems, I
Room 237, Bio Sciences West
Organizers:
Tom Kennedy, University of Arizona tgk@math.arizona.edu

9:00 a.m.
Nonmeanfield behavior in finitedimensional spin glasses.
Charles M. Newman, New York University
Daniel L. Stein*, University of Arizona
(9388241)

9:35 a.m.
Phase Structure of a Lattice Model of Flux Lines.
Christian Borgs, Microsoft Research
Jennifer T. Chayes*, Microsoft Research
Christopher King, Northeastern University
Neal Madras, York University
(93882138)

10:10 a.m.
Edge states of quantum spin chains.
Bruno L Nachtergaele*, University of California, Davis
(93882105)

Saturday November 14, 1998, 9:00 a.m.10:50 a.m.
Special Session on Dynamical Systems, I
Room 208, Bio Sciences West
Organizers:
Marek Rychlik, University of Arizona rychlik@u.arizona.edu
Maciej P. Wojtkowski, University of Arizona maciejw@math.arizona.edu

9:00 a.m.
Bootstrap Estimates of Chaotic Dynamics.
Eric Kostelich*, Arizona State University
(9385844)

9:30 a.m.
Understanding renormalization.
Ricardo PerezMarco*, UCLA
(9383047)

10:00 a.m.
The spectra of nonnegative integer matrices via formal power series.
Ormes S Nicholas*, University of Texas
Ki H Kim, Alabama State University
Fred W. Roush, Alabama State University
(9381530)

10:30 a.m.
Rational attractors and irrational continua for maps in the Lozi family.
Chris Cleveland*, Adjunct
(9385822)

Saturday November 14, 1998, 9:00 a.m.10:50 a.m.
Special Session on Arithmetic Algebraic Geometry, I
Room 219, Bio Sciences West
Organizers:
Douglas Ulmer, University of Arizona ulmer@math.arizona.edu

9:00 a.m.
Lowdegree points on curves: a worked example.
Joseph L. Wetherell*, University of Southern California
(93811125)

9:30 a.m.
Arithmetic of some curves of high genus .
Pavlos Tzermias*, University of Arizona
(9381189)

10:00 a.m.
Jacobians of genus one curves.
Sang Yook An, The University of Arizona
Seog Young Kim, The University of Arizona
David C. Marshall*, The University of Arizona
Susan H. Marshall, The University of Arizona
William G. McCallum, The University of Arizona
Alexander R. Perlis, The University of Arizona
(93814134)

10:30 a.m.
Jacobians of genus one curves.
Catherine H O'Neil, Mrs*, Harvard University
(9381183)

Saturday November 14, 1998, 9:00 a.m.10:40 a.m.
Special Session on Filaments, Interfaces and Patterns, I
Room 224, Physics & Atmospheric Sciences
Organizers:
Nicholas Ercolani, University of Arizona ercolani@math.arizona.edu
Jerry Moloney, University of Arizona

9:00 a.m.
Phase field theories and material interfaces.
Chaim Charach, BenGurion Univ
Paul C Fife*, University of Utah
(9388257)

9:30 a.m.
Boundary Homogenization of Kinetic and Fluid Models for Thin Film Deposition.
Christian A Ringhofer*, Arizona State University
(93870131)

10:15 a.m.
Atomistic, Continuum and Bulk Models for Epitaxial Growth.
Russel E. Caflisch*, UCLA
(9388278)

Saturday November 14, 1998, 9:00 a.m.10:50 a.m.
Special Session on Striking the Balance:Theory, Technique, and Applications in Lower Division Mathematics Courses, I
Room 242E, Shantz
Organizers:
Joseph Watkins, University of Arizona jwatkins@math.arizona.edu

9:30 a.m.
A NonRadical Version of `Calculus Reform'.
Neal Koblitz*, University of Washington
(9389809)

10:00 a.m.
Balancing Theory and Applications in Multivariable Calculus.
William G McCallum*, University of Arizona
(93898115)

10:30 a.m.
Stirling's approximation for ln$(n!)$: An elementary proof and applications.
Keith A. Brandt*, Missouri Western State College
Anton S. Wallner, Missouri Western State College
(9389821)

Saturday November 14, 1998, 11:15 a.m.12:05 p.m.
Invited Address
Poisson geometry and some applications.
Room 201, Physics & Atmospheric Sciences
JiangHua Lu*, University of Arizona
(93853137)

Saturday November 14, 1998, 1:30 p.m.2:20 p.m.
Invited Address
On the asymptotic speed of a stochastic invasion.
Room 201, Physics & Atmospheric Sciences
Mark A. Lewis*, University of Utah
(93860140)

Saturday November 14, 1998, 3:00 p.m.4:20 p.m.
Special Session on Groups and Computation
Room 404, Physics & Atmospheric Sciences
Organizers:
Robert Beals, University of Arizona beals@math.arizona.edu

3:00 p.m.
Algorithms in Representation Theory .
Klaus M Lux*, university of arizona
(93820127)

3:30 p.m.
Algorithms for matrix groups over number fields.
Robert M Beals*, University of Arizona
(93820130)

4:00 p.m.
Discussion

Saturday November 14, 1998, 3:00 p.m.6:10 p.m.
Special Session on Geometry and Lie Groups, II
Room 501, Mathematics
Organizers:
Samuel R. Evens, University of Arizona evens@math.arizona.edu
JiangHua Lu, University of Arizona jhlu@math.arizona.edu

3:00 p.m.
Invariant Theory and Entanglement in Quantum Computing.
David Meyer, University of California, San Diego
Nolan Wallach*, University of California, San Diego
(9382294)

3:40 p.m.
Representations and deformations of Lie bialgebroid.
Arkady Vaintrob*, New Mexico State University
(93853107)

4:20 p.m.
Poisson brackets on projective spaces and trilinear forms.
Alexander Polishchuk*, Harvard University
(9381460)

5:00 p.m.
Moduli of polygons and npointed projective lines.
Philip A Foth*, Northwestern University, University of Arizona
(9381461)

5:40 p.m.
Compact weakly symmetric spaces and spherical pairs.
Hieu D Nguyen*, Rowan University
(9385311)

Saturday November 14, 1998, 3:00 p.m.4:50 p.m.
Special Session on Spectral Geometry and Its Applications, II
Room 402, Mathematics
Organizers:
Xianzhe Dai, University of Southern California xdai@math.usc.edu
Leonid Friedlander, University of Arizona friedlan@math.arizona.edu

3:00 p.m.
Inverse Scattering Problems in Twodimensional Anisotropic Media .
Gregory Eskin*, UCLA
James V Ralston, UCLA
(9383520)

3:40 p.m.
An invariant of the smooth structure related to the first eigenvalue of the Laplacian.
Leonid Friedlander*, University of Arizona
Nikolai Nadirashvili, University of Chicago
(9383599)

4:20 p.m.
On the smallscale mass concentration of modes .
John A Toth*, McGill University
(9383512)

Saturday November 14, 1998, 3:00 p.m.5:50 p.m.
Special Session on Mathematics and Biology, II
Room 220, Physics & Atmospheric Sciences
Organizers:
Jim Cushing, University of Arizona cushing@math.arizona.edu
Shandelle M. Henson, University of Arizona henson@math.arizona.edu

3:00 p.m.
Consistency and Fluctuation Theorems for Discrete Time Structured Population Models Having Demographic Stochasticity .
Joseph C Watkins*, University of Arizona
(9389256)

3:30 p.m.
From Individuals to Population Dynamics: A Method and an Example .
Wade Leitner*, University of Arizona
(9386096)

4:00 p.m.
A Stochastic ContinuousTime AgeStructured Population Model.
Edward J. Allen*, Texas Tech University
Maruful Chowdhury, Texas Tech University
(9389210)

4:30 p.m.
Estimating Mean Time to Extinction; an Overview of Some Popular Methods.
Kevin R Anderson*, Institute for Mathematics and Its Applications
Wade Leitner, Department of Mathematics
(9389231)

5:00 p.m.
A model of the population dynamics and coevolution of mutualisms.
Brian J McGill*, U of Arizona
(93892123)

5:30 p.m.
Temperature based growth/mortality model for the Mountain Pine Beetle.
Peter W White*, Tarleton State University
(9389266)

Saturday November 14, 1998, 3:00 p.m.5:15 p.m.
Special Session on Classical and Quantum Mechanical Lattice Spin Systems, II
Room 237, Bio Sciences West
Organizers:
Tom Kennedy, University of Arizona tgk@math.arizona.edu

3:00 p.m.
Hyperscaling in Percolation.
Christian Borgs*, Microsoft Research
Jennifer T Chayes, Microsoft Research
Harry Kesten, Cornell University
Joel Spencer, New York University
(93882139)

3:35 p.m.
PowerLaw Corrections to Exponential Decay of Connectivities and Correlations.
Kenneth S. Alexander*, University of Southern California
(93860102)

4:10 p.m.
Surprises in the Hydrodynamics of Driven Lattice Gases .
Gregory Eyink*, University of Arizona
(93870117)

4:45 p.m.
Status of the two dimensional nonlinear Sigma models.
Adrian Patrascioiu*, University of Arizona
Erhard Seiler, Max Planck Institut fuer Physik
(93882129)

Saturday November 14, 1998, 3:00 p.m.5:50 p.m.
Special Session on Dynamical Systems, II
Room 208, Bio Sciences West
Organizers:
Marek Rychlik, University of Arizona rychlik@u.arizona.edu
Maciej P. Wojtkowski, University of Arizona maciejw@math.arizona.edu

3:00 p.m.
Multidimensional Piecewise Smooth Expanding Maps.
William J Cowieson*, UCLA
(9385848)

3:30 p.m.
Dynamics of Anosov diffeomorphisms with small holes .
Nikolai Chernov*, University of Alabama at Birmingham
(9385850)

4:00 p.m.
Distribution of return times for rational maps.
Nicolai T A Haydn*, University of Southern California
(9385855)

4:30 p.m.
On the KolmogorovSinai entropy of the Chirikov Standard map .
Oliver R Knill*, University of Texas
(9385854)

5:00 p.m.
Chaotic billiards on surfaces of constant curvature.
Eugene Gutkin*, USC
(9385828)

5:30 p.m.
Discussion

Saturday November 14, 1998, 3:00 p.m.4:50 p.m.
Special Session on Arithmetic Algebraic Geometry, II
Room 219, Bio Sciences West
Organizers:
Douglas Ulmer, University of Arizona ulmer@math.arizona.edu

3:00 p.m.
The central derivative of certain Hecke series.
Tonghai Yang*, SUNY at Stony Brook
(9381188)

3:30 p.m.
Starktype Conjectures ``over $\Bbb Z$''.
Cristian D. Popescu*, University of Texas at Austin
(9381164)

4:00 p.m.
Isogeny Covariant Differential Modular Forms .
Chris M Hurlburt*, University of New Mexico
(9381440)

4:30 p.m.
Moduli of Vector Bundles on Curves in Characteristic p > 0.
Kirti Joshi, University of Arizona
Eugene Z Xia*, University of Arizona
(9381438)

Saturday November 14, 1998, 3:00 p.m.5:40 p.m.
Special Session on Filaments, Interfaces and Patterns, II
Room 224, Physics & Atmospheric Sciences
Organizers:
Nicholas Ercolani, University of Arizona ercolani@math.arizona.edu
Jerry Moloney, University of Arizona

3:00 p.m.
Modelling bioconvection patterns produced by swimming bacteria.
Joceline C Lega*, University of Arizona
Neil H Mendelson, University of Arizona
(93892108)

3:30 p.m.
Convolution based methods for cellular automata models.
Steven J Ruuth*, Department of Mathematics, UCLA
Barry Merriman, Department of Mathematics, UCLA
Stanley Osher, Department of Mathematics, UCLA
(93865118)

4:00 p.m.
Dynamics of axial separation in long rotating drums.
Igor S Aranson, Argonne National Laboratory
Lev S Tsimring*, InstituteUniversity of California, San Diego
(9383585)

4:45 p.m.
The stability of waves for modulation equations.
Todd M Kapitula*, University of New Mexico
(9383595)

5:15 p.m.
Singularities and Defects in Patterns Far from Threshold.
Nicholas M Ercolani*, University of Arizona
Robert Indik, University of Arizona
Alan C. Newell, University of Warwick
Thierry Passot, CNRS
(93835110)

Saturday November 14, 1998, 3:00 p.m.5:20 p.m.
Special Session on Striking the Balance:Theory, Technique, and Applications in Lower Division Mathematics Courses, II
Room 242E, Shantz
Organizers:
Joseph Watkins, University of Arizona jwatkins@math.arizona.edu

3:00 p.m.
Encouraging Effective Change within an Atmosphere of Flexibility.
John W. Hagood*, Northern Arizona University
(93898100)

3:30 p.m.
Within the Balance, A Tilt Toward Applications.
Lynne B Small*, University of San Diego
(9389881)

4:00 p.m.
Where will the applications be coming from?
Brad G. Osgood*, Stanford University
(9389818)

4:30 p.m.
The balance  a moving target: Experiences from 5 years teaching in an integrated engineering curriculum .
Matthias Kawski*, ASU
(93898112)

5:00 p.m.
Discussion

Saturday November 14, 1998, 3:00 p.m.5:45 p.m.
Special Session on Integrable Systems and Random Matrix Theory, II
Room 312, Physics & Atmospheric Sciences
Organizers:
K. TR McLaughlin, University of Arizona
Craig A. Tracy, University of California, Davis tracy@itd.ucdavis.edu

3:00 p.m.
An electrostatics model for zeros og general orthogonal polynomials.
Mourad E.H. Ismail*, University of South Florida
(9383307)

4:00 p.m.
Statistics at the Edge of the Spectrum of Wigner Random Matrices.
Yakov G Sinai, Princeton University
Alexander B Soshnikov*, California Institute of Technology
(9386008)

5:00 p.m.
Determinantal formulas for the correlation functions and the infinite symmetric group.
Alexei Borodin*, University of Pennsylvania
Grigori Olshanski, Institute for Problems of Information Transmission
(9386039)

Saturday November 14, 1998, 4:15 p.m.5:25 p.m.
Session for Contributed Papers
Room 210, Bio Sciences West

4:15 p.m.
Selected Tessellations and the Nature of the Schaffli Numbers.
C. S. Felicitas*, Pan Asian Congress of Mathematicians(American and New York Branch)
(9381401)

4:30 p.m.
Mathematics basic skills for the first three grades.
Abdullah Alharbey*, King Abdulaziz University
(9389606)

4:45 p.m.
Kernel Inspired Factorizations of Partial Differential Operators.
Alex Kasman*, MSRI
(9383529)

5:00 p.m.
The Conditional Empirical Distribution as a Decision Making Tool.
Rod A Freed*, California State University, Dominguez Hills
(9380092)

5:15 p.m.
Generalized functions and approximate solutions to the abstract Cauchy problem.
Boris Baeumer*, University of Nevada, Reno
(93844109)
Sunday November 15, 1998

Sunday November 15, 1998, 8:00 a.m.12:00 p.m.
Meeting Registration and AMS Book Sale and Exhibit
Lobby, Mathematics

Sunday November 15, 1998, 8:00 a.m.10:45 a.m.
Special Session on Integrable Systems and Random Matrix Theory, III
Room 312, Physics & Atmospheric Sciences
Organizers:
K. TR McLaughlin, University of Arizona
Craig A. Tracy, University of California, Davis tracy@itd.ucdavis.edu

8:00 a.m.
Scaling limits for correlations between zeros of random polynomials.
Pavel M. Bleher*, IUPUI
(9386023)

9:00 a.m.
On the distribution of the length of the longest increasing subsequence of random permutations.
Jinho Baik, Courant Institute
Percy A Deift*, Courant Institute
Kurt Johansson, Royal Institute of Technology
(9380568)

10:00 a.m.
Zeros of the Jimbo, Miwa, Ueno tau function.
John N Palmer*, University of Arizona
(9383443)

Sunday November 15, 1998, 8:30 a.m.10:50 a.m.
Special Session on Mathematics and Biology, III
Room 220, Physics & Atmospheric Sciences
Organizers:
Jim Cushing, University of Arizona cushing@math.arizona.edu
Shandelle M. Henson, University of Arizona henson@math.arizona.edu

8:30 a.m.
A Mathematical model of microbial growth and competition in a plug flow reactor: a model of the gut.
Hal L Smith*, Arizona State University
(9389249)

9:00 a.m.
Temporal and spatial synchronization in microbial ecology.
Frank C Hoppensteadt*, ASU
(9389262)

9:30 a.m.
Differentiability and species coexistence.
Frederick R Adler*, AMS
(9389259)

10:00 a.m.
The dynamics of a simple food chain.
Sophia R.  J. Jang*, Texas Tech University
(93892101)

10:30 a.m.
A Dynamical System Modeling Meristematic Plant Developement and Reproducing the Observed Phyllotactic Patterns.
Pau Atela, Math Department, Smith College
Christophe Gole, Math Department, Smith College
Scott Hotton*, Math Department, University of California, Santa Cruz, CA 95064
(93892106)

Sunday November 15, 1998, 8:30 a.m.10:45 a.m.
Special Session on Classical and Quantum Mechanical Lattice Spin Systems, III
Room 237, Bio Sciences West
Organizers:
Tom Kennedy, University of Arizona tgk@math.arizona.edu

8:30 a.m.
Central Limit Theorem for Stochastic HamiltonJacobi equations.
Fraydoun Rezakhanlou*, Associate Professor
(9383582)

9:05 a.m.
Nonlinear wave equations with randomness.
Jan Wehr*, University of Arizona
(93860116)

9:40 a.m.
Localization of Classical Waves: A General Framework.
Andrew J. Koines*, University of California, Irvine
Abel Klein, University of California, Irvine
(93878122)

10:15 a.m.
Generalized eigenfunction expansion of second order partial differential operators defined by quadratic forms.
Abel Klein, University of California, Irvine
Maximilian Seifert*, University of California, Irvine
(93847136)

Sunday November 15, 1998, 9:00 a.m.10:50 a.m.
Special Session on Geometry and Lie Groups, III
Room 501, Mathematics
Organizers:
Samuel R. Evens, University of Arizona evens@math.arizona.edu
JiangHua Lu, University of Arizona jhlu@math.arizona.edu

9:00 a.m.
Gauge equivalence of Poisson structures.
Alan Weinstein*, University of California, Berkeley
(9385858)

9:40 a.m.
Groupoid and the integration of Lie algebroids.
Victor Nistor*, Penn State
(9385826)

10:20 a.m.
Braid Representations and Exceptional Lie Groups.
Hans Wenzl*, UC San Diego
Imre Tuba, UC San Diego
(9382270)

Sunday November 15, 1998, 9:00 a.m.10:50 a.m.
Special Session on Spectral Geometry and Its Applications, III
Room 402, Mathematics
Organizers:
Xianzhe Dai, University of Southern California xdai@math.usc.edu
Leonid Friedlander, University of Arizona friedlan@math.arizona.edu

9:00 a.m.
Bersteintype Theorem for Lagrangian Stationary Surfaces .
Chikako Mese*, University of Southern California
(9385316)

9:40 a.m.
Poisson problems, diffusions, and comparison theorems for complete Riemannian manifolds.
Patrick T McDonald*, New College of USF
(93858111)

10:20 a.m.
GinzburgLandau vortice and Mandelstam Diagram.
Jie Qing*, UCSC
(9385817)

Sunday November 15, 1998, 9:00 a.m.10:50 a.m.
Special Session on Dynamical Systems, III
Room 208, Bio Sciences West
Organizers:
Marek Rychlik, University of Arizona rychlik@u.arizona.edu
Maciej P. Wojtkowski, University of Arizona maciejw@math.arizona.edu

9:00 a.m.
Fast Singular Oscillating Limits of 3D EulerBoussinesq Equations .
Alex Mahalov*, Arizona State University
Anatoli Babin, UC Irvine, USA and MIIT, Moscow
Basil Nicolaenko, Arizona State University
(9385846)

9:30 a.m.
Exponential Attractors and Finite Dimensional Inertial Dynamical Systems for NavierStokes and General Dissipative Equations.
Basil Nicolaenko*, Arizona State University
(9385845)

10:00 a.m.
The Hill's Region of the Fourbody Problem .
Quidong Wang*, UCLA Mathematics Department
(9385825)

10:30 a.m.
The Horseshoe: Pruning and Homoclinic Families.
Andre S de Carvalho*, IMS  SUNY at Stony Brook
Toby Hall, University of Liverpool
(9385842)

Sunday November 15, 1998, 9:00 a.m.10:50 a.m.
Special Session on Arithmetic Algebraic Geometry, III
Room 219, Bio Sciences West
Organizers:
Douglas Ulmer, University of Arizona ulmer@math.arizona.edu

9:00 a.m.
The parameters of trace codes from curves over rings.
Felipe Voloch, University of Texas
Judy L Walker*, University of Nebraska
(9381177)

9:30 a.m.
Improved Bounds for the Number of Rational Points on Curves over Finite Fields .
Kristin E. Lauter*, University of Michigan
(9381169)

10:00 a.m.
Trigonal Modular Curves.
Matthew H Baker*, UC Berkeley
(9381153)

10:30 a.m.
On a conjecture of Fontaine and Mazur.
Yihsiang Liow*, University of Arizona
(93814143)

Sunday November 15, 1998, 9:00 a.m.10:40 a.m.
Special Session on Filaments, Interfaces and Patterns, III
Room 224, Physics & Atmospheric Sciences
Organizers:
Nicholas Ercolani, University of Arizona ercolani@math.arizona.edu
Jerry Moloney, University of Arizona

9:00 a.m.
Spectra, multiphase solutions of vortex filament flow, and knot types.
Annalisa M Calini*, College of Charleston
Thomas A Ivey, Ball State University
(9383580)

9:30 a.m.
Pulses, fronts and oscillations of an elastic rod .
Alain Goriely*, Dept of Mathematics
Joceline Lega, Department of Mathematics
(9387365)

10:15 a.m.
Viscous Nonlinear Dynamics of Twist and Writhe.
Raymond E Goldstein*, University of Arizona
(9383536)

Sunday November 15, 1998, 9:00 a.m.10:50 a.m.
Special Session on Striking the Balance:Theory, Technique, and Applications in Lower Division Mathematics Courses, III
Room 242E, Shantz
Organizers:
Joseph Watkins, University of Arizona jwatkins@math.arizona.edu

9:00 a.m.
Applications Inspire Student Confidence.
Simon J Bernau*, Cal Poly Pomona
Nancy C Marcus, University of Texas at El Paso
(9389813)

9:30 a.m.
Modular Pre Calculus and Clustering: Evolution of a Successful Program.
Simon J Bernau, Cal Poly Pomona
Nancy C Marcus*, University of Texas at El Paso
(9389814)

10:00 a.m.
An Introductory Modeling Course for NonScience Majors: Using Mathematica to Convey Mathematical Concepts.
Silvia P Heubach*, California State University Los Angeles
(9389879)

10:30 a.m.
Discussion

Sunday November 15, 1998, 11:15 a.m.12:05 p.m.
Invited Address
Differential Algebraic Geometry and Derivatives of Integers.
Room 201, Physics & Atmospheric Sciences
Alexandru Buium*, Univ of Illinois
(9381435)

Sunday November 15, 1998, 1:30 p.m.2:20 p.m.
Invited Address
Renormalization group methods in Hamiltonian dynamics.
Room 201, Physics & Atmospheric Sciences
Hans A Koch*, The University of Texas at Austin
(93870103)

Sunday November 15, 1998, 3:00 p.m.4:50 p.m.
Special Session on Dynamical Systems
Room 208, Bio Sciences West
Organizers:
Marek Rychlik, University of Arizona rychlik@u.arizona.edu
Maciej P. Wojtkowski, University of Arizona maciejw@math.arizona.edu

3:00 p.m.
Abundance of piecewise isometries with selfsimilar structure in dimension one and two.
Arek Goetz*, Boston University
(93858133)

3:30 p.m.
Positive stretch and rigidity for group actions and foliations.
Alberto Candel*, Caltech
Raul QuirogaBarranco, Cinvestav
(93853126)

4:00 p.m.
Several examples of multivalued dynamics.
Marek R. Rychlik*, University of Arizona
(93858132)

4:30 p.m.
Magnetic flows and Gaussian thermostats.
Maciej P. Wojtkowski*, University of Arizona
(93858114)

Sunday November 15, 1998, 3:00 p.m.4:50 p.m.
Special Session on Arithmetic Algebraic Geometry, IV
Room 219, Bio Sciences West
Organizers:
Douglas Ulmer, University of Arizona ulmer@math.arizona.edu

3:00 p.m.
Arithmetic Schubert calculus.
Harry Tamvakis*, University of Pennsylvania
(93814120)

3:30 p.m.
Deformations of Large Fundamental Groups.
Bruno N De Oliveira*, Lecturer of Mathematics
Ludmil Katzarkov, Assistant Professor
(9381493)

4:00 p.m.
Algebraic cycles and arithmetic on degenerations.
Caterina Consani*, Massachusetts Institute of Technology
(9381484)

4:30 p.m.
On Frobenius splittings and ordinary varieties.
Kirti Joshi*, University of Arizona
(93814142)

Sunday November 15, 1998, 3:00 p.m.5:40 p.m.
Special Session on Filaments, Interfaces and Patterns, IV
Room 224, Physics & Atmospheric Sciences
Organizers:
Nicholas Ercolani, University of Arizona ercolani@math.arizona.edu
Jerry Moloney, University of Arizona

3:00 p.m.
A Generalized Level Set Method for Computing the Motion of Filaments and Objects of Any Codimension.
LiTien Cheng, UCLA, Dept. of Math
Paul Burchard, UCLA, Dept. of Math
Barry Merriman*, UCLA, Dept. of Math
Stanley J Osher, UCLA, Dept. of Math
Steven J Ruuth, UCLA, Dept. of Math
(93865128)

3:30 p.m.
A diffusiongenerated approach to the curvature motion of filaments.
Steven J. Ruuth, University of California, Los Angeles
Barry Merriman, University of California, Los Angeles
Jack Xin, University of Arizona
Stanley Osher*, University of California, Los Angeles
(9386532)

4:00 p.m.
Dynamics of the Geodynamo.
Dieter Armbruster*, Arizona State University
(93886119)

4:45 p.m.
Average dynamics of the optical soliton in communication lines with dispersion management.
Alejandro B Aceves*, University of New Mexico
C.K.R.T. Jones, Brown University
Vadim Zharnitsky, Brown University
Sergei K Turitsyn, University of Dusseldorf
(9387897)

5:15 p.m.
Role of the Critical Collapse Singularity in Sustaining A Novel Femtosecond Light Guide .
Jerry V. Moloney*, University of Arizona
(93878135)

Sunday November 15, 1998, 3:00 p.m.4:50 p.m.
Special Session on Striking the Balance:Theory, Technique, and Applications in Lower Division Mathematics Courses, IV
Room 242E, Shantz
Organizers:
Joseph Watkins, University of Arizona jwatkins@math.arizona.edu

3:00 p.m.
Institutional support for faculty members involved in teacher preparation and outreach.
David Gay*, University of Arizona
(9389898)

3:30 p.m.
High Standards: What are they and how do we achieve them?
Deborah Hughes Hallett*, University of Arizona
(93898113)

4:00 p.m.
Providing Challenges, Interest, and Comfort for Incoming AP Students.
David O Lomen*, University of Arizona
(9389863)

4:30 p.m.
Discussion
Inquiries: meet@ams.org