AMS Sectional Meeting Program by Day
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2000 Spring Central Section Meeting
Notre Dame, IN, April 89, 2000
Meeting #953
Associate secretaries:
Susan J Friedlander, AMS
susan@math.northwestern.edu
Saturday April 8, 2000

Saturday April 8, 2000, 7:30 a.m.4:30 p.m.
Meeting Registration
First Floor Lobby, Center for Continuing Education, McKenna Hall

Saturday April 8, 2000, 7:30 a.m.4:30 p.m.
Exhibit and Book Sale
First Floor Lobby, Center for Continuing Education, McKenna Hall

Saturday April 8, 2000, 8:00 a.m.10:50 a.m.
Special Session on Differential Geometry and Its Applications, I
Room 155, DeBartolo Hall
Organizers:
Jianguo Cao, University of Notre Dame cao.7@nd.edu
Brian Smyth, University of Notre Dame smyth.1@nd.edu
Frederico Xavier, University of Notre Dame xavier.1@nd.edu

8:00 a.m.
Behavior of eigenfunctions near the ideal boundary of hyperbolic space.
Harold G Donnelly*, Purdue University
(9535869)

8:30 a.m.
Generalized Harnacks for Ricci flow on manifolds with positive curvature operator.
Bennett Chow*, University of Minnesota
Dan Knopf, University of Wisconsin
(95358153)

9:00 a.m.
Dimension of the space of polynomial growth harmonic functions.
Peter Li, University of California, Irvine
Jiaping Wang*, University of Minnesota
(95358244)

9:30 a.m.
Local rigidity of certain classes of almost K\"ahler 4manifolds.
Vestislav Apostolov, IHES, France
John Armstrong, Oxford, UK
Tedi Draghici*, Northeastern Illinois University, USA
(95353111)

10:00 a.m.
A differential geometric construction of the Thom class.
JiPing Sha*, Indiana University at Bloomington
(95353237)

10:30 a.m.
Forms from pullbacks, currents from projections.
Bruce Solomon*, Indiana University
(95344230)

Saturday April 8, 2000, 8:30 a.m.11:25 a.m.
Special Session on Microlocal Analysis and Partial Differential Equations, I
Room 138, DeBartolo Hall
Organizers:
Nicholas Hanges, CUNY, Lehman College nwhlc@cunyvm.cuny.edu
Alex Himonas, University of Notre Dame alex.a.himonas.1@nd.edu

8:30 a.m.
Complex line bundles and hypocomplex vector fields.
Howard Jacobowitz*, Rutgers University  Camden
Gerardo Mendoza, Temple University
(95335313)

9:00 a.m.
An F. and M. Riesz theorem for planar vector fields.
Shiferaw Berhanu, Temple University
Jorge Hounie*, Universidade Federal de S\~ao Carlos
(9533538)

9:30 a.m.
On the existence of elliptic pseudodifferential operators.
Howard Jacobowitz, Rutgers University
Gerardo A Mendoza*, Temple University
(95358261)

10:00 a.m.
Hypoellipticity of nonsingular closed 1forms on compact manifolds.
Abdelhamid Meziani*, Florida International University
(95335133)

10:30 a.m.
Uniqueness in the Cauchy problem for certain first order pdes.
Shif Berhanu*, Temple University
Jorge Hounie, Universidade federal de Sao Carlos
(95335119)

11:00 a.m.
Analytic hypoellipticity of Sums of squares revisited.
Sagun Chanillo*, Rutgers University, New Brunswick, NJ
Francois Treves, Rutgers University, New Brunswick
(95335147)

Saturday April 8, 2000, 8:30 a.m.11:20 a.m.
Special Session on Nonlinear Partial Differential Equations, I
Room 136, DeBartolo Hall
Organizers:
Qing Han, University of Notre Dame Qing.Han.7@nd.edu
Bei Hu, University of Notre Dame Bei.Hu.1@nd.edu
HongMing Yin, Washington State University

8:30 a.m.
Recent Progress on the Analysis of Microwave Heating.
HongMing Yin*, Washington State University
(9533574)

9:00 a.m.
Lower Semicontinuity of $L^\infty$ Functionals.
E. N Barron*, Loyola University Chicago
R. R Jensen, Loyola University Chicago
C.Y. Wang, University of Kentucky
(95349107)

9:30 a.m.
On Linear Boundary Values of Weakly Quasiregular Mappings.
Baisheng Yan*, Michigan State University
(9533567)

10:00 a.m.
Single point and double point blow up for a problem arising in chemotaxis.
Howard A Levine*, Iowa State University
(9533565)

10:30 a.m.
Mathematical theories for smectic A liquid crystal materials.
Chun Liu*, Penn State University
(95335126)

11:00 a.m.
Steady States of `Thin Fluid Film' PDEs: Stability and Relative Energy Levels.
Richard S. Laugesen*, University of Illinois, UrbanaChampaign
Mary C. Pugh, University of Pennsylvania
(9533527)

Saturday April 8, 2000, 8:30 a.m.11:20 a.m.
Special Session on Algebraic Coding Theory, I
Room 126, DeBartolo Hall
Organizers:
Judy Walker, University of Nebraska jwalker@math.unl.edu
Jay Wood, Purdue University, Calumet wood@calumet.purdue.edu

8:30 a.m.
Some properties of the relatives of projective ReedMuller codes.
Peng Ding*, Clemson University, SC
(95394174)

9:00 a.m.
Minimum weight generators of generalized ReedMuller codes.
Jennifer D. Key*, Clemson University, SC
(95394113)

9:30 a.m.
On $(q^2+q+2,q+2)$arcs in the projective plane $\mathrm{PG}(2,q)$.
Harold N. Ward*, University of Virginia
(9539487)

10:00 a.m.
Dual Codes of Translation Planes.
Kelle L. Clark*, Clemson University, SC
(95394114)

10:30 a.m.
Orthogonal Designs and SpaceTime Codes for Wireless Communication.
Robert Calderbank*, AT&T Labs
(95305241)

11:00 a.m.
Algorithmic machinery for answering questions about existence and properties of hypothetical binary linear codes with specific parameters.
David B Jaffe*, Univ. of Nebraska  Lincoln
(95394236)

Saturday April 8, 2000, 8:30 a.m.11:20 a.m.
Special Session on Differential Inequalities and Applications, I
Room 208, DeBartolo Hall
Organizers:
Paul W. Eloe, University of Dayton eloe@neelix.udayton.edu

8:30 a.m.
Existence of Solutions for $2n^{th}$ Order Nonlinear Generalized SturmLiouville Boundary Value Problems.
Jeffrey A. Ehme, Spelman College
Paul W. Eloe, University of Dayton
Johnny Henderson*, Auburn University
(9533440)

9:00 a.m.
Three Symmetric Positive Solutions for Lidstone Problems By a Generalization of the LeggettWilliams Theorem.
Richard I Avery, Dakota State University
John M Davis*, Baylor University
Johnny Henderson, Auburn University
(95334141)

9:30 a.m.
Boundary Value Problems for Weakly Coupled Equations.
William K.C. Yin*, LaGrange College
(95334234)

10:00 a.m.
Nonlinear Volterra Perturbations.
Theodore A Burton*, Northwest Research Institute
(9533458)

10:30 a.m.
Some integrability properties of solutions of nonlinear third order differential equations.
M. Bartu\v sek, Masaryk University
John R Graef*, University of Tennessee at Chattanooga
(95334246)

11:00 a.m.
Recent developments on semipositone systems.
Maya Chhetri*, The University of North Carolina at Greensboro
(95335264)

Saturday April 8, 2000, 8:30 a.m.11:20 a.m.
Special Session on Representations of Groups and Related Objects, I
Room 102, DeBartolo Hall
Organizers:
Chris Bendel, University of Wisconsin, Stout bendelc@uwstout.edu
George McNinch, University of Notre Dame mcninch.1@nd.edu

8:30 a.m.
Overgroups of irreducible alternating groups.
William J Husen*, Ohio State University
(95320252)

9:00 a.m.
Restricted Lie Triple Systems and Algebraic Groups.
Terrell L Hodge*, Western Michigan University
(95320202)

9:30 a.m.
On maximal subgroups of finite classical groups.
Kay Magaard*, Wayne State University
Gerhard Roehrle, Universitaet Bielefeld
Donna Testerman, Geneva/ Switzerland
(95320240)

10:00 a.m.
Orthogonality of Cosets Relative to Irreducible Characters of Finite Groups.
Randall R Holmes*, Auburn University
(95320118)

10:30 a.m.
Blocks for $A_n$ and selfdual $p$cores.
Ben Ford*, Sonoma State University
(95320214)

11:00 a.m.
The multiplicityfree permutation representations of the Ree groups ${}^2G_2(q)$ and Suzuki groups ${}^2B_2(q)$.
Julianne G. Rainbolt, Saint Louis University
Jagat K. Sheth*, Saint Louis University
(9532023)

Saturday April 8, 2000, 8:30 a.m.11:15 a.m.
Special Session on Algebraic Methods in Statistics, I
Room 216, DeBartolo Hall
Organizers:
Marlos Viana, University of Illinois, Chicago viana@uic.edu

8:30 a.m.
Evolution Equations on Lie Groups and Stochastic Processes.
Philip Feinsilver*, Southern Illinois University
Jerzy Kocik, Southern Illinois University
(9536085)

9:30 a.m.
Deconvolution on compact Lie groups.
Peter T Kim*, University of Guelph
(9536253)

10:30 a.m.
Some moment properties of the multivariate Dirichlet distributions.
Rameshwar Gupta, University of New Brunswick
Donald Richards*, University of Virginia
(9536281)

Saturday April 8, 2000, 9:00 a.m.11:20 a.m.
Special Session on Commutative Algebra, I
Room 129, DeBartolo Hall
Organizers:
Juan Migliore, University of Notre Dame migliore.1@nd.edu
Chris Peterson, Colorado State University peterson@math.colostate.edu

9:00 a.m.
On Nagata's Conjecture.
Brian Harbourne*, University of Nebraska
(95314129)

9:30 a.m.
Generalisation of a theorem of Kempf on vector bundles on Projective Spaces.
Mohan Kumar*, Washington University in St. Louis
(95314307)

10:00 a.m.
On the variety of special linear systems of degree $g1$ on smooth algebraic curves.
A Ohbuchi, Tokushima University
C Keem*, Seoul National University
K Cho, Seoul, Korea
(95314232)

10:30 a.m.
Reduced arithmetically Gorenstein subschemes with prescribed properties.
Uwe Nagel*, Universit\"atGH Paderborn
(95313267)

11:00 a.m.
Liaison and CastelnuovoMumford regularity.
Marc Chardin, CNRS and Universite Paris 6
Bernd Ulrich*, Michigan State University
(95313257)

Saturday April 8, 2000, 9:00 a.m.11:20 a.m.
Special Session on Optimization and Numerical Analysis, I
Room 215, DeBartolo Hall
Organizers:
Leonid Faybusovich, University of Notre Dame leonid.faybusovich.1@nd.edu

9:00 a.m.
New theories of setvalued differentials and new versions of the maximum principle of optimal control.
Hector J Sussmann*, Rutgers University
(95349158)

9:30 a.m.
Discrete Schur flow and applications.
Yoshimasa Nakamura*, Osaka University
(9533534)

10:00 a.m.
On totally nonnegative matrices.
Michael Gektman*, University of Notre Dame
(95315254)

10:30 a.m.
Passive ReducedOrder Modeling via KrylovSubspace Methods.
Roland W Freund*, Bell Laboratories
(95365110)

11:00 a.m.
Unitary Hessenberg Eigenproblems: Algorithms and Applications.
Gregory S Ammar*, Northern Illinois University
(95365296)

Saturday April 8, 2000, 9:00 a.m.11:20 a.m.
Special Session on Integrable Systems and Nonlinear Waves, I
Room 141, DeBartolo Hall
Organizers:
Mark S. Alber, University of Notre Dame mark.s.alber.1@nd.edu
Gerard Misiolek, University of Notre Dame misiolek.1@nd.edu

9:00 a.m.
Poisson Structures, Asymptotic Stability and Integrable System.
Anthony Bloch*, University of Michigan
(95337268)

9:30 a.m.
Continuous Symmetries of Difference Equations.
Pavel Winternitz*, CRM, Montreal, Canada
(95337269)

10:00 a.m.
Radiation Loss of DispersionManaged Solitons.
William Kath*, Northwestern University
(95337271)

10:30 a.m.
Weak Shock Reflection.
John Hunter*, UC Davis
(95337272)

11:00 a.m.
The Zero Dispersion Limit of the mKdV Hierarchy for the Nonselfadjoint ZS Operator.
David Levermore*, University of Arizona, Tucson
(95337273)

Saturday April 8, 2000, 9:00 a.m.11:20 a.m.
Special Session on Algebraic Geometry, I
Room 117, DeBartolo Hall
Organizers:
Karen Chandler, University of Notre Dame chandler.6@nd.edu
Scott Nollet, University of Notre Dame nollet.1@nd.edu

9:00 a.m.
An algebraic proof of a formula of Zak on the dimension of the Gauss image.
Aron Simis, Universidade Federal de Pernambuco
Karen E Smith*, University of Michigan
Bernd Ulrich, Michigan State University
(95314223)

9:30 a.m.
Hodge integrals and Hurwitz numbers.
Tom Graber*, Harvard University
Ravi Vakil, MIT
(95314262)

10:00 a.m.
Hodge integrals, Hurwitz numbers, and the GromovWitten potential of a point.
Ravi Vakil*, MIT
Ian P Goulden, University of Waterloo
David M Jackson, University of Waterloo
(95314253)

10:30 a.m.
Moduli spaces of weighted pairs.
Brendan Hassett*, University of Chicago
(95314293)

11:00 a.m.
Some remarks on the Hodge conjectures for abelian varieties.
Elham Izadi*, University of Georgia
(95314195)

Saturday April 8, 2000, 9:00 a.m.11:20 a.m.
Special Session on Several Complex Variables, I
Room 209, DeBartolo Hall
Organizers:
Jeffrey Diller, University of Notre Dame diller.1@nd.edu
Nancy Stanton, Univeristy of Notre Dame stanton.1@nd.edu

9:00 a.m.
Solving the $d$ and $\overline\partial$equations in thin tubes and applications to mappings.
Franc Forstneric*, University of WisconsinMadison
Erik Low, University of Oslo
Nils Ovrelid, University of Oslo
(9533272)

10:00 a.m.
Regularity of $\overline{\partial}$ on pseudoconcave compacts and applications.
Andrei Iordan*, Institut de Math\'ematiques de Jussieu
(95332345)

10:30 a.m.
Isomorphism of two Lie algebras arising in CRgeometry.
Alexander V. Isaev*, Australian National University
Vladimir V. Ezhov, University of Adelaide
(95332136)

11:00 a.m.
The Green function with a pole along a complex subspace.
Finnur Larusson*, University of Western Ontario
Ragnar Sigurdsson, University of Iceland
(95332140)

Saturday April 8, 2000, 9:00 a.m.11:15 a.m.
Special Session on Homotopy Theory, I
Room 101, DeBartolo Hall
Organizers:
William G. Dwyer, University of Notre Dame dwyer.1@nd.edu
Michele Intermont, Kalamazoo College intermon@kzoo.edu

9:00 a.m.
A MinamiWebb formula for compact Lie groups.
John Martino*, Western Michigan University
Stewart Priddy, Northwestern University
(9535536)

9:30 a.m.
On spin and modularity in conformal field theory.
Igor Kriz*, University of Michigan
(95355175)

10:00 a.m.
Equivariant LubinTate formal group laws.
Kevin P Lee*, Purdue University Calumet
(95355320)

10:30 a.m.
Periodic Spaces and Group Actions.
Alejandro Adem*, University of Wisconsin
Jeffrey H Smith, Purdue University
(9535548)

Saturday April 8, 2000, 9:00 a.m.11:20 a.m.
Special Session on Applications of Invariant Manifold Theory, I
Room 140, DeBartolo Hall
Organizers:
Peter Bates, Brigham Young University peter@math.byu.edu
Clarence Eugene Wayne, Boston University cew@math.bu.edu

9:00 a.m.
The parameterization method for invariant manifolds.
Rafael de la Llave*, Univ. of Texas at Austin
Ernest Fontich, Univ. de Barcelona
Xavier Cabre, Univ. Polit. Catalunya
(95358101)

9:30 a.m.
Detecting Invariant Manifolds in Time Series.
Lou Pecora*, Naval Research Laboratory
Tom Carroll, Naval Research Laboratory
(9533788)

10:00 a.m.
Chaotic Synchronization and Invariant Manifolds.
Kresimir Josic*, Boston University
(9533789)

10:30 a.m.
Using center manifold theory to find canard solutions.
Martin Krupa*, New Mexico State University, Las Cruces, NM
(9533493)

11:00 a.m.
Invariant manifolds for singular perturbations with turning points.
Weishi Liu*, University of Kansas
(9533442)

Saturday April 8, 2000, 9:00 a.m.11:25 a.m.
Special Session on Quasigroups and Loops and Their Applications, I
Room 131, DeBartolo Hall
Organizers:
Michael K. Kinyon, Indiana University South Bend mkinyon@iusb.edu
J. D. Phillips, Saint Mary's College of California phillips@stmarysca.edu

9:00 a.m.
Linear Moufang Loops.
Maria Lourdes Giuliani*, Universidade Federal de Santa Maria
Francisco Polcino Milies, Universidade de Sao Paulo
(9532011)

9:30 a.m.
Homogeneous Congruence Loops.
Thomas Q Sibley*, St. John's University
(9532097)

10:00 a.m.
Webs with rotation and reflecion properties and their relations with certain loops.
Bokhee Im*, Dept. of Math./Chonnam National University
Helmut Karzel, Zentrum Mathematik/Technische Universitaet Muenchen
(95320225)

10:30 a.m.
$p$Ranks of Nets.
G E Moorhouse*, University of Wyoming
(95305300)

11:00 a.m.
Algebraic aspects of the theory of 4webs $W (4, 2, r)$.
Vladislav V. Goldberg*, New Jersey Institute of Technology
(9532008)

Saturday April 8, 2000, 9:00 a.m.11:20 a.m.
Special Session on Number Theory, Algorithms, and Cryptography, I
Room 118, DeBartolo Hall
Organizers:
Eric Bach, University of Wisconsin, Madison bach@cs.wisc.edu
Jonathan Sorenson, Butler University sorenson@butler.edu

9:00 a.m.
Jacobians of Hyperelliptic Curves with Prime Order.
Douglas Kuhlman*, University of Illinois at Urbana/Champaign
(95311322)

9:30 a.m.
A note on Shanks's Chains of Primes.
Edlyn Teske, University of Waterloo
Hugh C Williams*, University of Manitoba
(95311142)

10:30 a.m.
Online analysis of algorithms for computing quadratic irregularity.
Joshua R Holden*, Duke University
(9531119)

11:00 a.m.
Clear Rosettes.
Casey K Storey*, C.F.C.T.E. Foundation
(9537059)

Saturday April 8, 2000, 9:00 a.m.11:30 a.m.
Special Session on Cooperative Learning in Undergraduate Mathematics Education,I
Room 210, DeBartolo Hall
Organizers:
Nahid Erfan, University of Notre Dame erfan.1@nd.edu
Vic Perera, Kent State University pererav@trumbull.kent.edu

9:00 a.m.
Cooperative Learning in Undergraduate Mathematics: Generalities, Difficulties, An Approach and Results.
Ed Dubinsky*, Georgia State University
(9539716)

10:00 a.m.
The "Nuts and Bolts" of One Approach to Cooperative Learning: THE ACE CYCLE.
Keith Schwingendorf*, Purdue University North Central
(9539718)

11:00 a.m.
Discussion

Saturday April 8, 2000, 9:00 a.m.10:45 a.m.
Special Session on Geometry and Analysis in Carnot Carath\'eodory Spaces, I
Room 217, DeBartolo Hall
Organizers:
Scott Pauls, Rice University pauls@math.rice.edu

9:00 a.m.
Regularity near the characteristic set in the nonlinear Dirichlet problem and conformal geometry of sublaplacians.
Nicola Garofalo, Purdue University
Dimiter N Vassilev*, Purdue University
(9533531)

10:00 a.m.
Legendrian Energy Minimizers.
Luca Capogna*, University of Arkansas
FangHua Lin, Courant Institute
(95349201)

Saturday April 8, 2000, 9:30 a.m.11:15 a.m.
Special Session on Singularities in Algebraic Geometry, I
Room 120, DeBartolo Hall
Organizers:
Sandor Kovacs, University of Chicago kovacs@math.uchicago.edu
Andras Nemethi, Ohio State University nemethi@math.ohiostate.edu

9:30 a.m.
Generalized Casson Invariants via Gauge Theory.
Hans U Boden*, The Ohio State UniversityMansfield
Christopher Herald, University of Nevada, Reno
(95357130)

10:30 a.m.
Equivariant Casson and links of singularities.
Olivier Collin, Harvard University
Nikolai Saveliev*, Tulane University
(9533221)

Saturday April 8, 2000, 9:30 a.m.11:15 a.m.
Special Session on Index Theory and Topology, I
Room 119, DeBartolo Hall
Organizers:
John Roe, Pennsylvania State University roe@math.psu.edu
Stephan Stolz, University of Notre Dame stolz.1@nd.edu
Bruce Williams, University of Notre Dame williams.4@nd.edu

9:30 a.m.
Cutting and pasting manifolds from the algebraic point of view.
Andrew Ranicki*, University of Edinburgh
(95355245)

10:30 a.m.
Infinite isotropy in group actions.
Erik K Pedersen*, SUNY Binghampton
(95357342)

Saturday April 8, 2000, 9:30 a.m.11:20 a.m.
Special Session on Symbolic Dynamics, I
Room 207, DeBartolo Hall
Organizers:
William Geller, Indiana UnivPurdue Univ Indianapolis wgeller@math.iupui.edu
Nicholas S. Ormes, University of Texas, Austin ormes@math.utexas.edu

9:30 a.m.
Strong Shift Equivalence and Diffeomorphisms.
Jack Wagoner*, UC Berkeley
(95381165)

10:00 a.m.
Canonical symbolic dynamics for onedimensional generalized solenoids.
Inhyeop Yi*, UNiversity of Maryland, College Park
(95358344)

10:30 a.m.
Some Ktheoretic invariants from shifts of finite type.
Danrun Huang*, St. Cloud State University, St. Cloud, MN
(95337194)

11:00 a.m.
Hyperbolic dynamics and operator algebras.
Jerry Kaminker*, IUPUI
(95337308)

Saturday April 8, 2000, 11:40 a.m.12:30 p.m.
Invited Address
Persistence of Invariant Manifolds and Invariant Foliations.
Auditorium, Center for Continuing Education, McKenna Hall
Peter W Bates*, Brigham Young University
(95358251)

Saturday April 8, 2000, 2:00 p.m.2:50 p.m.
Invited Address
Continued fractions and integrable systems.
Auditorium, Center for Continuing Education, McKenna Hall
David Sattinger*, Utah State University
(9533704)

Saturday April 8, 2000, 3:00 p.m.6:20 p.m.
Special Session on Commutative Algebra, II
Room 129, DeBartolo Hall
Organizers:
Juan Migliore, University of Notre Dame migliore.1@nd.edu
Chris Peterson, Colorado State University peterson@math.colostate.edu

3:30 p.m.
Mixed Ladder Determinantal Varieties.
Nicolae Gonciulea, University of Michigan
Claudia Miller*, University of Michigan
(95313326)

4:00 p.m.
Equidimensional symmetric algebras and residual intersections.
Mark R Johnson*, University of Arkansas
(95313125)

4:30 p.m.
The Vanishing Conjecture for maps of Tor and "strong" splitting in modulefinite extensions.
Nandini Ranganathan*, Univeristy of Michigan
(95313249)

5:00 p.m.
Linkage of Modules.
Heath M Martin*, University of Central Florida
(95313220)

5:30 p.m.
Primes Associated to Multigraded Modules.
Eric West*, University of Kansas
(95313266)

6:00 p.m.
Closures of ideals.
Alberto Corso*, Michigan State University
(95313333)

Saturday April 8, 2000, 3:00 p.m.5:20 p.m.
Special Session on Differential Geometry and Its Applications, II
Room 155, DeBartolo Hall
Organizers:
Jianguo Cao, University of Notre Dame cao.7@nd.edu
Brian Smyth, University of Notre Dame smyth.1@nd.edu
Frederico Xavier, University of Notre Dame xavier.1@nd.edu

3:00 p.m.
Cohomogeneity One Einstein Equations and Integrability.
Andrew Dancer, Oxford University
McKenzie Y Wang*, McMaster University
(95353196)

3:30 p.m.
Vector Fields on Flows of Certain Closed 3Manifolds and Their Confoliations.
Richard H. Escobales, Jr.*, Canisius College
(9535315)

4:00 p.m.
The role played by a special family of Finsler surfaces.
David Bao*, University of Houston
(95353184)

4:30 p.m.
Projectively Related Einstein Metrics in RiemannFinsler Geometry.
Zhongmin Shen*, Indiana Univ.Purdue Univ. at Indianapolis
(95353216)

5:00 p.m.
Local Moduli Space.
Gang Liu*, University of California Los Angeles
(95353352)

Saturday April 8, 2000, 3:00 p.m.5:20 p.m.
Special Session on Optimization and Numerical Analysis, II
Room 215, DeBartolo Hall
Organizers:
Leonid Faybusovich, University of Notre Dame leonid.faybusovich.1@nd.edu

3:00 p.m.
A Primal InteriorPoint Method for Nonconvex Minimization.
Florian Jarre*, University of Notre Dame
(9539063)

3:30 p.m.
A longstep primaldual pathfollowing algorithm for symmetric programming problem.
Leonid Faybusovich*, University of Notre Dame
Rebekah Arana, University of Notre Dame
(9539056)

4:00 p.m.
Solution of Quadratic Assignment Problems Using Quadratic Programming Relaxations.
Kurt M Anstreicher*, Dept. of Management Sciences, University of Iowa
(95390209)

4:30 p.m.
Approximation of DenseSubgraph and the Complement of MinBisection.
Yinyu Ye*, The University of Iowa
Jiawei Zhang, The University of Iowa
(95368229)

5:00 p.m.
Optimal Magnetic Shield Design by PrimalDual InteriorPoint Algorithm.
Takashi Tsuchiya*, The Institute of Statistical Mathematics
(95349303)

Saturday April 8, 2000, 3:00 p.m.5:55 p.m.
Special Session on Microlocal Analysis and Partial Differential Equations, II
Room 138, DeBartolo Hall
Organizers:
Nicholas Hanges, CUNY, Lehman College nwhlc@cunyvm.cuny.edu
Alex Himonas, University of Notre Dame alex.a.himonas.1@nd.edu

3:00 p.m.
A reflection principle for degenerate hypersurfaces.
Xiaojun Huang*, Rutgers University
(95332145)

3:30 p.m.
Local solvability for operators with double characteristics and real principal part.
Stefano Benvenuti, University of Ferrara
Enrico Bernardi, University of Bologna
Antonio Bove*, University of Bologna
(95335200)

4:00 p.m.
Solvability near the characteristic set for a class of planar vector fields of infinite type.
Adalberto P Bergamasco*, Universidade Federal de São Carlos/ Brazil
Abdelhamid Meziani, Florida International University
(95335161)

4:30 p.m.
Conormal suspensions of differential complexes.
C. Denson Hill*, SUNY at Stony Brook
(95335324)

5:00 p.m.
The tangential CauchyRiemann complex on Lipschitz boundaries.
MeiChi Shaw*, University of Notre Dame
(95335321)

5:30 p.m.
Analytic singularities of the Bergman kernel for tubes.
Gabor Francsics, Columbia University
Nicholas Hanges*, Lehman College/CUNY
(95332127)

Saturday April 8, 2000, 3:00 p.m.5:20 p.m.
Special Session on Integrable Systems and Nonlinear Waves, II
Room 141, DeBartolo Hall
Organizers:
Mark S. Alber, University of Notre Dame mark.s.alber.1@nd.edu
Gerard Misiolek, University of Notre Dame misiolek.1@nd.edu

3:00 p.m.
An EulerianLagrangian Approach to the NavierStokes Equations.
Peter Constantin*, University of Chicago
(95335274)

3:30 p.m.
Solitary wave collisions in the Ion Acoustic Plasma Equations.
David Sattinger*, Utah State University
(95337275)

4:00 p.m.
Nonlinear stability of densitystratified shear flows in 2D.
Harvey Segur*, University of Colorado, Boulder
Micheal Weinstein, Bell Labs
(95335276)

4:30 p.m.
What happens after the CamassaHolm equation breaks down.
Henry McKean*, Courant Institute
(95337279)

5:00 p.m.
The long wave limit for the water wave equations and the FPU model.
Eugene Wayne*, Boston University
(95335280)

Saturday April 8, 2000, 3:00 p.m.5:50 p.m.
Special Session on Algebraic Geometry, II
Room 117, DeBartolo Hall
Organizers:
Karen Chandler, University of Notre Dame chandler.6@nd.edu
Scott Nollet, University of Notre Dame nollet.1@nd.edu

3:00 p.m.
On the connectedness of the Hilbert scheme of curves in ${\bf P}^3$.
Robin Hartshorne*, U. C. Berkeley
(95314179)

3:30 p.m.
Degenerations of sums of line bundles.
Prabhakar Rao*, University of Missouri  St.Louis
Mohan N Kumar, Washington University
Chris Peterson, Colorado State University
(95314310)

4:00 p.m.
Counting Rational Points on K3 Surfaces.
David K McKinnon*, Tufts University
(95314191)

4:30 p.m.
Singularities of Rational Curves on K3 Surfaces.
Xi Chen*, U. C. Santa Barbara
(95314172)

5:00 p.m.
The Bounds on Euler Numbers of Threefolds.
MeiChu Chang*, University of California at Riverside
(95314157)

5:30 p.m.
Remarks on irregular varieties.
Christopher D Hacon*, Univ. of Utah
Jungkai A Chen, National Chung Cheng Univ., Taiwan
(9531443)

Saturday April 8, 2000, 3:00 p.m.5:50 p.m.
Special Session on Several Complex Variables, II
Room 209, DeBartolo Hall
Organizers:
Jeffrey Diller, University of Notre Dame diller.1@nd.edu
Nancy Stanton, Univeristy of Notre Dame stanton.1@nd.edu

3:00 p.m.
Dynamics of Polynomial Diffeomorphisms of $C^2$.
Eric Bedford*, Indiana University
(95337176)

4:00 p.m.
Holomorphic selfmaps of $\mathbb P^2$ with an invariant elliptic curve.
Marius V Dabija*, University of Michigan
(95337242)

4:30 p.m.
Hyperbolic automorphisms and holomorphic motions in ${\bf C^2}$.
Gregery Buzzard, Cornell University
Kaushal Verma*, Syracuse University
(95332341)

5:00 p.m.
Progress report on some injective mapping problems.
Dror Varolin*, University of Michigan
(95332263)

5:30 p.m.
The dbar Neumann problem on Reinhardt domains.
Siqi Fu, University of Wyoming
Emil J Straube*, Texas A&M University
(95332277)

Saturday April 8, 2000, 3:00 p.m.5:45 p.m.
Special Session on Homotopy Theory, II
Room 101, DeBartolo Hall
Organizers:
William G. Dwyer, University of Notre Dame dwyer.1@nd.edu
Michele Intermont, Kalamazoo College intermon@kzoo.edu

3:00 p.m.
Hopkins' proof of the Landweber Exact Functor Theorem.
Haynes R. Miller*, MIT
(95355346)

4:00 p.m.
On the Homotopy Theory of Commutative Algebras and the Rigidity of the Cotangent Complex.
James M Turner*, Calvin College
(9535550)

4:30 p.m.
Gamma homology, Topological AndreQuillen homology and Stabilization.
Maria Basterra*, UIUC
Randy McCarthy, UIUC
(95355247)

5:00 p.m.
Small chain models for the little ncubes.
James E McClure*, Purdue University
Jeffrey H Smith, Purdue University
(95355205)

Saturday April 8, 2000, 3:00 p.m.5:50 p.m.
Special Session on Nonlinear Partial Differential Equations, II
Room 136, DeBartolo Hall
Organizers:
Qing Han, University of Notre Dame Qing.Han.7@nd.edu
Bei Hu, University of Notre Dame Bei.Hu.1@nd.edu
HongMing Yin, Washington State University

3:00 p.m.
Multiple solutions of nonhomogeneous semilinear elliptic equation in the entire space.
YB Deng, Huazhong Normal University
Y Li*, University of Iowa
XJ Zhao, Savannah State University
(95335340)

3:30 p.m.
Singular and Rarefactive Solutions to a Nonlinear Variational Wave Equation.
Ping Zhang, Academia Sinica
Yuxi Zheng*, Indiana University
(95335160)

4:00 p.m.
Regularity of solutions of nonlinear oblique derivative problems in nonsmooth domains.
Gary M Lieberman*, Iowa State University
(9533566)

4:30 p.m.
Eigenvalue problems related to the onset of superconductivity.
Peter J Sternberg*, Indiana University
(95335228)

5:00 p.m.
A Class of Degenerate Equations.
Lihe Wang*, University of Iowa
(95335325)

5:30 p.m.
Variational Formulations for VlasovPoissonFokkerPlanck Systems.
Chaocheng Huang*, Wright State University
Richard Jordan, Worcester Polytechnic Institute
(9533576)

Saturday April 8, 2000, 3:00 p.m.6:20 p.m.
Special Session on Algebraic Coding Theory, II
Room 126, DeBartolo Hall
Organizers:
Judy Walker, University of Nebraska jwalker@math.unl.edu
Jay Wood, Purdue University, Calumet wood@calumet.purdue.edu

3:00 p.m.
Quaternary QuasiCyclic Codes and Some New Binary Codes.
Nuh Aydin*, The Ohio State University
Dijen K. RayChaudhuri, The Ohio State University
(9530544)

3:30 p.m.
When the Binary Images of GF(4) Codes are DoublyEven.
Vera Pless*, UnUniv. of IllinoisChicago icago
(9539447)

4:00 p.m.
Codes with a nonHamming metric.
Steven T Dougherty*, University of Scranton
(9539484)

4:30 p.m.
MDS Codes over Finite Rings.
Hiroshi Horimoto, Kumamoto University
Keisuke Shiromoto*, Louisiana State University
(95305198)

5:00 p.m.
Preordered Sets and Codes over Rings.
Marcus Greferath, Ohio University at Athens
Stefan E. Schmidt*, M.I.T.
(95305213)

5:30 p.m.
A $\mathbb{Z}_8$linear Lift of the Golay Code and Derived Examples of Outperforming Nonlinear Binary Codes.
Iwan M Duursma, University of Limoges, France
Marcus Greferath*, Ohio University at Athens, OH
Simon Litsyn, University of Tel Aviv
Stefan E Schmidt, MIT, Cambridge, MA
(95305265)

6:00 p.m.
Finite Frobenius Local Rings, Partial Difference Sets and TwoWeight Codes.
Xiangdong Hou*, Wright State University
(95305297)

Saturday April 8, 2000, 3:00 p.m.5:45 p.m.
Special Session on Singularities in Algebraic Geometry, II
Room 120, DeBartolo Hall
Organizers:
Sandor Kovacs, University of Chicago kovacs@math.uchicago.edu
Andras Nemethi, Ohio State University nemethi@math.ohiostate.edu

3:00 p.m.
Boundedness for $3$fold singularities.
James M$^c$kernan*, Mathematics Department, UCSB
(95314117)

4:00 p.m.
About Mapping Class Groups in higher dimensions and Geometric Monodromy of the Milnor fiber.
Nikolai A Krylov*, University of Illinois at Chicago
(95314137)

5:00 p.m.
Elliptic Genera and applications to mirror symmetry.
Anatoly Libgober*, University of Illinois at Chicago
(95314221)

Saturday April 8, 2000, 3:00 p.m.5:50 p.m.
Special Session on Applications of Invariant Manifold Theory, II
Room 140, DeBartolo Hall
Organizers:
Peter Bates, Brigham Young University peter@math.byu.edu
Clarence Eugene Wayne, Boston University cew@math.bu.edu

3:00 p.m.
1Dimensional Properties of Scalar Parabolic Equations.
Kening Lu*, Brigham Young University
(95335109)

3:30 p.m.
Strong pulse interaction in coupled reactiondiffusion systems.
Tasso Kaper*, Boston University
(9533596)

4:00 p.m.
Homoclinic orbits for singularly perturbed NLS.
Chongchun Zeng*, Courant Institute, NYU
(9533790)

4:30 p.m.
A geometric singular perturbation theory for hyperbolic PDE with relaxation?
Govind Menon*, Div. of App. Math., Brown University
(9533514)

5:00 p.m.
Dynamics of Patterns in the Optical Parametric Oscillator.
Keith S. Promislow*, Simon Fraser University
(95335104)

5:30 p.m.
Asymptotic Behaviour of the Domain of Analyticity of Invariant Curves of the Standard Map.
Tere M. Seara*, Universitat Polit\`ecnica de Catalunya
Jordi Villanueva, Universitat Polit\`ecnica de Catalunya
(95358168)

Saturday April 8, 2000, 3:00 p.m.5:50 p.m.
Special Session on Differential Inequalities and Applications, II
Room 208, DeBartolo Hall
Organizers:
Paul W. Eloe, University of Dayton eloe@neelix.udayton.edu

3:00 p.m.
Positive Solutions to Singular Nonlinear Boundary Value Problems.
Lynn H Erbe*, University of NebraskaLincoln
(95339116)

3:30 p.m.
Lyapunov Inequalities for Time Scales.
Martin J Bohner*, University of Missouri  Rolla
Stephen Clark, University of Missouri  Rolla
Jerry Ridenhour, Utah State University
(95334144)

4:00 p.m.
Riccati equations of a selfadjoint matrix differential equation on a measure chain.
Allan C Peterson*, University of NebraskaLincoln
(95339115)

4:30 p.m.
Improvements to the LeggettWilliams Fixed Point Theorem.
Richard I Avery*, Dakota State University
(9533494)

5:00 p.m.
Asymptotic properties of solutions of a 2nth order differential equation on a time scale.
Douglas R Anderson*, Concordia College
Allan Peterson, University of NebraskaLincoln
(9533464)

5:30 p.m.
On the global stability of cycles in difference equations.
Saber N Elaydi*, Trinity University
(95339315)

Saturday April 8, 2000, 3:00 p.m.6:25 p.m.
Special Session on Quasigroups and Loops and Their Applications, II
Room 131, DeBartolo Hall
Organizers:
Michael K. Kinyon, Indiana University South Bend mkinyon@iusb.edu
J. D. Phillips, Saint Mary's College of California phillips@stmarysca.edu

3:00 p.m.
From Bruck to Bol, Part I.
Michael K Kinyon*, Indiana University South Bend
(95320231)

3:30 p.m.
From Bruck to Bol, Part II.
Jon D. Phillips*, Saint Mary's College of California
(95320149)

4:00 p.m.
From Bruck to Bol, Part III.
Tuval S Foguel*, Department of Mathematics, NDSU
(95317151)

4:30 p.m.
Bol Loops and Right Alternative Rings: Some Connections.
Edgar G Goodaire*, Memorial University of Newfoundland
(9532075)

5:00 p.m.
On matrix loops over near fields and nonassociative division algebras.
Clifton E. Ealy*, Western Michigan University
(9530829)

5:30 p.m.
On the theory of Bruck loops.
Liudmila L Sabinina*, Facultad de Ciencias, UAEM
(95320243)

Saturday April 8, 2000, 3:00 p.m.5:45 p.m.
Special Session on Index Theory and Topology, II
Room 119, DeBartolo Hall
Organizers:
John Roe, Pennsylvania State University roe@math.psu.edu
Stephan Stolz, University of Notre Dame stolz.1@nd.edu
Bruce Williams, University of Notre Dame williams.4@nd.edu

3:00 p.m.
A general splitting formula for the spectral flow.
Paul A Kirk*, Indiana University
Mark Daniel, API, Inc.
(9535841)

4:00 p.m.
An AtiyahSinger Topological Index for Proper Actions of Countable Discrete Groups.
Jody Trout*, Dartmouth College
(9531930)

5:00 p.m.
Index theories associated to $c_0$ coarse structures.
John Roe*, Penn State University
Nicholas Wright, Penn State University
(95358304)

Saturday April 8, 2000, 3:00 p.m.5:20 p.m.
Special Session on Number Theory, Algorithms, and Cryptography, II
Room 118, DeBartolo Hall
Organizers:
Eric Bach, University of Wisconsin, Madison bach@cs.wisc.edu
Jonathan Sorenson, Butler University sorenson@butler.edu

3:00 p.m.
Prime numbers with few one bits in their binary representation.
Samuel S Wagstaff*, Purdue University
(9531191)

3:30 p.m.
Number theory and formal languages.
Jeffrey O Shallit*, University of Waterloo
(9531113)

4:30 p.m.
On the Method of ``XL'' and its Inefficiency Against TTM.
T. Moh*, Purdue University
(95394350)

5:00 p.m.
Faster multiplication of integers.
Daniel J. Bernstein*, University of Illinois at Chicago
(95311349)

Saturday April 8, 2000, 3:00 p.m.5:50 p.m.
Special Session on Representations of Groups and Related Objects, II
Room 102, DeBartolo Hall
Organizers:
Chris Bendel, University of Wisconsin, Stout bendelc@uwstout.edu
George McNinch, University of Notre Dame mcninch.1@nd.edu

3:00 p.m.
Unipotent elements, tilting modules, and saturation.
Gary M Seitz*, University of Oregon
(9532037)

3:30 p.m.
Algebraic groups in positive characteristic and affine Lie algebas.
Leonard L Scott*, The University of Virginia
(95320222)

4:00 p.m.
On comparing the cohomology of general linear and symmetric groups.
Alexander S Kleshchev, University of Oregon
Daniel K Nakano*, Utah St. University
(9532068)

4:30 p.m.
On Comparing the Cohomology of Algebraic Groups, Finite Chevalley Groups and Frobenius Kernels.
Christopher P Bendel, University of Wisconsin, Stout
Daniel K Nakano, Utah State University
Cornelius Pillen*, University of South Alabama
(95320206)

5:00 p.m.
Affine Lie algebras and Witt vectors.
Edward T Cline, University of Oklahoma
Brian J Parshall*, University of Virginia
Leonard L Scott, University of Virginia
(95320197)

5:30 p.m.
On transfer from reductive groups to affine Lie algebras.
Edward Cline*, University of Oklahoma
Brian Parshall, University of Virginia
Leonard Scott, University of Virginia
(95320215)

Saturday April 8, 2000, 3:00 p.m.6:20 p.m.
Special Session on Cooperative Learning in Undergraduate Mathematics Education,II
Room 210, DeBartolo Hall
Organizers:
Nahid Erfan, University of Notre Dame erfan.1@nd.edu
Vic Perera, Kent State University pererav@trumbull.kent.edu

3:00 p.m.
Interactive Uses of Technology, Group Learning, Discovery Approach.
Martha Aliaga*, University of Michigan
(95397108)

4:00 p.m.
Collaborative Learning Outside the Class.
Nahid A Erfan*, University of Notre Dame
(9539755)

4:30 p.m.
Cooperative learning and mathematics teacher education.
Anne E Brown*, Indiana University South Bend
(95397217)

5:00 p.m.
Title: Teaching Hypothesis Test through Cooperative Learning (CL).
Aklilu Zeleke*, Alma College
(9539717)

5:30 p.m.
Cooperative Learning: A Moderate's Approach.
Beverly Reed*, Kent State University
(9539735)

6:00 p.m.
Teaching and Learning Geometry: An inquiry approach using a variety of group settings.
Jay Jahangiri, Kent State University
Tom Delaney, Kent State University
Michael Mikusa*, Kent State University
(95397199)

Saturday April 8, 2000, 3:00 p.m.5:20 p.m.
Special Session on Symbolic Dynamics, II
Room 207, DeBartolo Hall
Organizers:
William Geller, Indiana UnivPurdue Univ Indianapolis wgeller@math.iupui.edu
Nicholas S. Ormes, University of Texas, Austin ormes@math.utexas.edu

3:00 p.m.
Knots, groups and symbolic dynamical systems.
Daniel S Silver*, University of South Alabama
Susan G Williams, University of South Alabama
(95337330)

3:30 p.m.
Links and algebraic $Z^d$actions.
Daniel S Silver, University of South Alabama
Susan G Williams*, University of South Alabama
(95337312)

4:00 p.m.
Complexity in symbolic dynamics.
Sebastien S Ferenczi*, CNRS, Tours, FRANCE
(9532845)

4:30 p.m.
Generalized rotations in dimension two and their underlying symbolic and arithmetic structures.
Luca Q Zamboni*, University of North Texas
(95337188)

5:00 p.m.
Symbolic dynamics for billiards.
Eugene Gutkin*, University of Southern California
(9533739)

Saturday April 8, 2000, 3:00 p.m.5:45 p.m.
Special Session on Algebraic Methods in Statistics, II
Room 216, DeBartolo Hall
Organizers:
Marlos Viana, University of Illinois, Chicago viana@uic.edu

3:00 p.m.
Normal Forms and Exponential Generating Functions for the Hypergeometric Distribution.
Ian H Dinwoodie*, Tulane University
(9536282)

4:00 p.m.
Algebraic Systems of Generating Functions in Random Walk Problems.
Steven P Lalley*, University of Chicago
(9536092)

5:00 p.m.
Statistical models and category representations.
Peter McCullagh*, University of Chicago
(9536207)

Saturday April 8, 2000, 3:00 p.m.5:45 p.m.
Special Session on Geometry and Analysis in Carnot Carath\'eodory Spaces, II
Room 217, DeBartolo Hall
Organizers:
Scott Pauls, Rice University pauls@math.rice.edu

3:00 p.m.
Surface measures in some CarnotCarath\'eodory Spaces.
Francesco Serra Cassano*, University of Trento
Roberto Monti, University of Trento
(95349173)

4:00 p.m.
A Notion of Rectifiability Modelled on Carnot Groups.
Scott D Pauls*, Rice University
(95353105)

5:00 p.m.
Differentiability and Area formula on Stratified Nilpotent Lie groups.
Valentino Magnani*, Scuola Normale Superiore
(95328155)

Saturday April 8, 2000, 3:00 p.m.4:40 p.m.
Session on Contributed Papers
Room 214, DeBartolo Hall

3:00 p.m.
Injective Comodules for $2\times 2$ Quantum Matrices.
William Chin, DePaul University
Leonid Krop*, DePaul University
(9532024)

3:15 p.m.
Some Units in Hecke Algebras.
Frank A Casabianca*, Auburn University
Randall R Holmes, Auburn University
(95320204)

3:30 p.m.
Rationality of Certain Linear Automorphisms on rational Function Fields.
Hamza Ahmad, Lincoln University
Mowaffaq Hajja*, American University of Sharjah
Mingchang Kang, Taiwan National University
(95312132)

3:45 p.m.
The Tailsum Partial Order on Certain Products from a Prime Sequence.
Michael E Detlefsen*, Slippery Rock University
(9531322)

4:00 p.m.
Breakdown of strong convergence in nonlinear viscoelasticity.
Mikhail M Shvartsman*, University of St. Thomas
(95335334)

4:15 p.m.
Extension of nonlinear operators and application to problems with nonhomogeneous boundary conditions.
Rouslan V Krechetnikov*, Aerospace and Mechanical Engineering/University of Notre Dame
(95335295)

4:30 p.m.
The speed of invasion for integrodifference equations with Allee growth functions.
MeiHui Wang*, University of Tennessee, Knoxville
Mark Kot, University of Tennessee, Knoxville
Michael G. Neubert, Woods Hole Oceanographic Institution
(9539210)
Inquiries: meet@ams.org