AMS Sectional Meeting Program by Day
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2004 Fall Central Section Meeting
Evanston, IL, October 2324, 2004
Meeting #1001
Associate secretaries:
Susan J Friedlander, AMS
susan@math.northwestern.edu
Saturday October 23, 2004

Saturday October 23, 2004, 7:00 a.m.4:00 p.m.
Exhibit and Book Sale
Room L 150, Technological Institute

Saturday October 23, 2004, 7:15 a.m.4:00 p.m.
Meeting Registration
Lobby, Technological Institute

Saturday October 23, 2004, 8:00 a.m.11:20 a.m.
Special Session on Solving Polynomial Systems, I
Room G 43, Donald P. Jacobs Center
Organizers:
Anton Leykin, University of Illinois at Chicago leykin@math.uic.edu
Jan Verschelde, University of Illinois at Chicago jan@math.uic.edu

8:00 a.m.
Homotopies to Compute Intersections of Solution Components of Polynomial Systems.
Andrew J Sommese*, University of Notre Dame
(10016591)

8:30 a.m.
Solving Polynomial Systems by Intersecting Subsystems Using Diagonal Homotopies.
Andrew J Sommese, University of Notre Dame
Jan Verschelde, University of Illinois at Chicago
Charles W Wampler*, General Motors R&D Center
(100165104)

9:00 a.m.
Advantages of Parsing Polynomials into Straightline Programs.
Daniel J Bates*, University of Notre Dame
(100168243)

9:30 a.m.
Break

10:00 a.m.
Is the attained solution isolated?
TienYien Li*, Department of Mathematics, Michigan State University, E.Lansing,MI
(100165201)

10:30 a.m.
Newton's Method with Deflation for Isolated Singularities of Polynomial Systems.
Anton Leykin, University of Illinois at Chicago
Jan Verschelde, University of Illinois at Chicago
Ailing Zhao*, University of Illinois at Chicago
(100165235)

11:00 a.m.
Determination of the dimension of a variety and some applications.
Wenyuan Wu*, Department of Applied Mathematics, University of Western Ontario
Greg Reid, Department of Applied Mathematics, University of Western Ontario
(10011494)

Saturday October 23, 2004, 8:30 a.m.10:50 a.m.
Special Session on Iterated Function Systems and Analysis on Fractals, I
Room L 160, Technological Institute
Organizers:
KaSing Lau, Chinese University of Hong Kong kslau@math.cuhk.edu.hk
Stephen S.T. Yau, University of Illinois at Chicago yau@uic.edu

8:30 a.m.
Orthogonal families of exponentials.
Steen Pedersen*, Wright State University
(100128361)

9:00 a.m.
Variable coefficient Iterated Function Systems associated with multiresolution analysis.
Palle E. T. Jorgensen*, University of Iowa
(10014605)

9:30 a.m.
Refinable functions with arbitrary dilations.
Yang Wang*, Georgia Institute of Technology
Dejun Feng, Tsinghua University
(10012807)

10:00 a.m.
The 3x+1 Semigroup.
David Applegate, At&T LabsResearch
Jeffrey C Lagarias*, University of Michigan
(100111352)

10:30 a.m.
On the Connectedness and Disklikeness of Selfaffine Tiles.
KaSing Lau*, Department of Mathematics, The Chinese University of Hong Kong
King Shun Leung, Department of Mathematics, Hong Kong Inst.of Education
(10012654)

Saturday October 23, 2004, 8:30 a.m.11:20 a.m.
Special Session on Nonlinear Waves, I
Room L R2, Technological Institute
Organizers:
Jerry L. Bona, University of Illinois at Chicago bona@math.uic.edu
Shuming Sun, Virginia Polytechnic Institute and State University sun@math.vt.edu
Bingyu Zhang, University of Cincinnati bzhang@math.uc.edu

8:30 a.m.
Collapse dynamics in YangMills, nonlinear Schroedinger and KellerSegel equations.
I M Sigal*, University of Notre Dame and University of Toronto
(100135368)

9:00 a.m.
Eventual Periodicity for dispersive wave equations in a quarter plane.
Jiahong Wu*, Oklahoma State University
(100135152)

9:30 a.m.
Comparison of Quarterplane and Twopoint Boundary Value Problems: The BBMequation.
Hongqiu Chen*, Univerity of Memphis and University of Illinois at Chicago
Jerry L Bona, University of Illinois at Chicago
Shuming Sun, Virginia Polytechnic Institute and State University
Bingyu Zhang, University of Cincinnati
(100135327)

10:00 a.m.
Beyond 3/4 for the Kortewegde Vries Equation.
Jerry L. Bona, University of Illinois at Chicago
Shuming Sun, Virginia Tech
BingYu Zhang*, University of Cincinnati
(100135158)

10:30 a.m.
The initialboundary value problem for the onedimensional nonlinear Schr\"odinger equation.
Justin Holmer*, University of California, Berkeley
(100135309)

11:00 a.m.
Spectra of Positive and Negative Energies in the Linearized NLS Problem.
Vitali G Vougalter*, University of Notre Dame Department of Mathematics
(100135408)

Saturday October 23, 2004, 8:30 a.m.10:45 a.m.
Special Session on Mathematical Problems in Robotics, I
Room A 110, Technological Institute
Organizers:
Robert W. Ghrist, University of Illinois at UrbanaChampaign ghrist@math.uiuc.edu

Saturday October 23, 2004, 8:30 a.m.10:50 a.m.
Special Session on Algebraic Representations and Deformations, I
Room LG 52, Technological Institute
Organizers:
Stephen R. Doty, Loyola University of Chicago doty@math.luc.edu
Anthony Giaquinto, Loyola University of Chicago tonyg@math.luc.edu

8:30 a.m.
Endotrivial modules for finite groups of Lie type (joint work with J. Carlson and D. Nakano).
Nadia Paola Mazza*, University of Georgia, Athens, GA
(10012089)

9:00 a.m.
Ideal Structure of Iterated Smash Tensor Power of the Restricted Enveloping Algebra of $sl_2$.
Stefan Catoiu*, DePaul University
(100116386)

9:30 a.m.
Algebras related to branching rules.
Jeb F. Willenbring*, University of Wisconsin  Milwaukee
(100122272)

10:00 a.m.
FCR factors of Enveloping algebras.
Ian M Musson*, Department of Mathematical Sciences, University of WisconsinMilwaukee
Jeb F. Willenbring, Department of Mathematical Sciences, University of Wisconsin
(100116389)

10:30 a.m.
Fixed Subrings of Noetherian Graded Regular Rings.
Ellen E. Kirkman*, Wake Forest University
James J. Kuzmanovich, Wake Forest University
(100116262)

Saturday October 23, 2004, 8:30 a.m.11:20 a.m.
Special Session on Mathematical Techniques in Musical Analysis, I
Auditorium, Technological Institute
Organizers:
Judith Baxter, University of Illinois at Chicago baxter@uic.edu
Richard Cohn, University of Chicago rcohn@uchicago.edu
Robert Peck, Louisiana State University rpeck@lsu.edu

Saturday October 23, 2004, 8:30 a.m.11:20 a.m.
Special Session on Hopf Algebras at the Crossroads of Algebra, Category Theory, and Topology, I
Room G 45, Donald P. Jacobs Center
Organizers:
Louis H. Kauffman, University of Illinois at Chicago kauffman@uic.edu
David E. Radford, University of Illinois at Chicago radford@uic.edu
Fernando J. O. Souza, University of Iowa fernandosouza@uiowa.edu

8:30 a.m.
Groups of grouplikes of a semisimple Hopf algebra and its dual.
Yevgenia Kashina*, DePaul University
(100116399)

9:00 a.m.
Application of the FadeevReshetikhinTaxhtajan construction to produce new finitedimensional quasitriangular Hopf algebras which are not equivalent via cocycle twisting.
Jacob Towber*, Mathematics Department, De Paul Univrsity, Chicago, Illinois
(100108342)

9:30 a.m.
Differential Algebra Structures on Families of Trees.
Robert L. Grossman, Uinv. of Illinois at Chicago
Richard G. Larson*, Univ. of Illinois at Chicago
(100116274)

10:00 a.m.
A note on antiYetterDrinfeld modules.
Mihai D Staic*, SUNY at Buffalo
(100116222)

10:30 a.m.
YetterDrinfeld modules, flatness, and Hopfcyclic cohomology.
Masoud Khalkhali*, Mathematics Department, University of Western Ontario, London ON, Canada
(100118237)

11:00 a.m.
Some results on coFrobenius Hopf algebras.
Margaret Beattie*, Mount Allison University
(100116348)

Saturday October 23, 2004, 8:30 a.m.11:20 a.m.
Special Session on Extremal Combinatorics, I
Room G 36, Donald P. Jacobs Center
Organizers:
Dhruv Mubayi, University of Illinois at Chicago mubayi@math.uic.edu
Yi Zhao, University of Illinois at Chicago zhao@math.uic.edu

8:30 a.m.
It's raining hyperedges: Online intersecting hypergraphs beyond the threshold.
Ryan Martin*, Iowa State University
Tom Bohman, Carnegie Mellon University
Alan Frieze, Carnegie Mellon University
Miklos Ruszinko, Computer and Automation Research Institute, Hungarian Academy of Sciences
Cliff Smyth, Carnegie Mellon University
(10010529)

9:00 a.m.
The Ramsey number for hypergraph cycles I.
P Haxell*, University of Waterloo
T. Luczak, Adam Mickiewicz University
Y. Peng, Indiana State University
V. Rodl, Emory University
A. Rucinski, Adam Mickiewicz University
M. Simonovits, Renyi Institute of Mathematics
J. Skokan, Universidade de Sao Paulo
(100105323)

9:30 a.m.
Ramsey number of hypergraph cycles II.
Jozef Skokan*, Universidade de Sao Paulo
(100105184)

10:00 a.m.
Codegree Density of hypergraphs.
Dhruv Mubayi, University of Illinois at Chicago
Yi Zhao*, University of Illinois at Chicago
(100105192)

10:30 a.m.
Extremal problems on packing of $d$degenerate graphs.
Bela Bollob\' as, University of Memphis
Alexandr Kostochka*, University of Illinois at UrbanaChampaign
Kittikorn Nakprasit, University of Illinois at UrbanaChampaign
(10010518)

11:00 a.m.
Maximum $K_{r+1}$free graphs which are not $r$partite.
Mihyun Kang, Humbodlt University, Berlin
Oleg Pikhurko*, Carnegie Mellon University
(100105137)

Saturday October 23, 2004, 8:30 a.m.11:20 a.m.
Special Session on Fluid Dynamics, Diffusion and Reaction, I
Room M 177, Technological Institute
Organizers:
Peter S. Constantin, University of Chicago const@cs.uchicago.edu
Leonid V. Ryzhik, University of Chicago ryzhik@math.uchicago.edu

Saturday October 23, 2004, 8:30 a.m.11:20 a.m.
Special Session on Computability Theory and Applications, I
Room G 03, Donald P. Jacobs Center
Organizers:
Robert I. Soare, University of Chicago soare@math.uchicago.edu
Denis R. Hirschfeldt, University of Chicago drh@math.uchicago.edu

8:30 a.m.
Degrees of nontrivial selfembeddings of computable linear orderings.
Rodney G. Downey, Victoria University of Wellington
Carl Jockusch*, University of Illinois at UrbanaChampaign
Joseph S. Miller, Victoria University of Wellington
(10010344)

9:00 a.m.
Computable structures of high rank.
W. Calvert, University of Notre Dame
S. S. Goncharov, Sobolev Institute/Novosibirsk State University
J. F. Knight*, University of Notre Dame
O. Kudinov, Sobolev Institute/Novosibirsk State University
A. S. Morozov, Sobolev Institute/Novosibirsk State University
V. Puzarenko, Sobolev Institute/Novosibirsk State University
(10010369)

9:30 a.m.
Index sets of dense Boolean algebras.
Barbara F. Csima*, Cornell University
Antonio Montalban, Cornell University
Richard A. Shore, Cornell University
(100103170)

10:00 a.m.
Ramsey Degrees.
Joseph R Mileti*, University of Chicago
(100103161)

10:30 a.m.
Undecidability in the Enumeration Degrees.
Thomas F. Kent*, University of Wisconsin, Madison
(100103199)

11:00 a.m.
Description and Comparison of Computable Structures.
Wesley Calvert*, University of Notre Dame
Valentina Harizanov, George Washington University
Julia F. Knight, University of Notre Dame
Sara Miller, University of Notre Dame
(10010382)

Saturday October 23, 2004, 9:00 a.m.10:50 a.m.
Special Session on Differential Geometry, I
Room MG 28, Technological Institute
Organizers:
Anders Ingemar Linner, Northern Illinois University linner@math.northwestern.edu
Hongyou Wu, Northern Illinois University wu@math.niu.edu

Saturday October 23, 2004, 9:00 a.m.10:45 a.m.
Special Session on Spectral Problems of Differential Operators, I
Room M 128, Technological Institute
Organizers:
Qingkai Kong, Northern Illinois University kong@math.niu.edu
Hongyou Wu, Northern Illinois University wu@math.niu.edu
Anton Zettl, Northern Illinois University zettl@math.niu.edu

Saturday October 23, 2004, 9:00 a.m.11:20 a.m.
Special Session on Modern Schubert Calculus, I
Room G 44, Donald P. Jacobs Center
Organizers:
Ezra Miller, University of Minnesota ezra@math.umn.edu
Frank Sottile, Texas A&M University sottile@math.tamu.edu

Saturday October 23, 2004, 9:00 a.m.11:20 a.m.
Special Session on Representation Theory of Reductive Groups, I
Room LG 66, Technological Institute
Organizers:
Jeffrey D. Adler, University of Akron adler@uakron.edu
JuLee Kim, University of Illinois at Chicago julee@math.uic.edu

Saturday October 23, 2004, 9:00 a.m.11:20 a.m.
Special Session on LowDimensional Topology and Kleinian Groups, I
Room LG 76, Technological Institute
Organizers:
Ian Agol, University of Illinois at Chicago agol@math.uic.edu
John Holt, University of Illinois at Chicago jholt@math.uic.edu
Saul Schleimer, University of Illinois at Chicago saul@math.uic.edu

Saturday October 23, 2004, 9:00 a.m.11:25 a.m.
Special Session on Special Functions, Orthogonal Polynomials, and their Applications, I
Room L 158, Technological Institute
Organizers:
George Gasper, Northwestern University george@math.northwestern.edu
Ahmed I. Zayed, DePaul University azayed@math.depaul.edu

Saturday October 23, 2004, 9:00 a.m.10:50 a.m.
Special Session on Codes and Applications, I
Room G 42, Donald P. Jacobs 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

Saturday October 23, 2004, 9:00 a.m.10:55 a.m.
Special Session on Nonlinear Partial Differential Equations and Applications, I
Room L R3, Technological Institute
Organizers:
GuiQiang Chen, Northwestern University gqchen@math.northwestern.edu
Mikhail Feldman, University of Wisconsin at Madison feldman@math.wisc.edu

Saturday October 23, 2004, 9:30 a.m.11:20 a.m.
Special Session on Stability Issues in Fluid Dynamics, I
Room L R4, Technological Institute
Organizers:
Susan J. Friedlander, University of Illinois at Chicago susan@math.uic.edu
Roman Shvydkoy, University of Illinois at Chicago shvydkoy@math.uic.edu

9:30 a.m.
The effect of gravity modulation on the onset of filtrational convection.
Natalya Popova*, University of Illinois at Chicago
(100176326)

10:00 a.m.
Generic hydrodynamic instability via contact homology.
Robert Ghrist*, University of Illinois, UrbanaChampaign, Mathematics
John Etnyre, Univeristy of Pennsylvania, Mathematics
(100137395)

10:30 a.m.
Fractal patterns formed by growth of radial viscous fingers.
Harry L. Swinney*, University of Texas at Austin
O. Praud, University of Texas at Austin
E. Sharon, University of Texas at Austin
(100176293)

11:00 a.m.
Faraday wave pattern selection via multifrequency forcing.
Mary Silber*, Applied Mathematics Dept., Northwestern University
Jeff Porter, Dept. of Applied Mathematics, University of Leeds
Chad M. Topaz, Dept. of Mathematics, UCLA
(100176245)

Saturday October 23, 2004, 9:30 a.m.11:20 a.m.
Special Session on Applications of Motives, I
Room L 211, Technological Institute
Organizers:
Eric M. Friedlander, Northwestern University eric@math.northwestern.edu
Alexander Goncharov, Brown University sasha@math.brown.edu
Mikhail Kapranov, Yale University mikhail.kapranov@yale.edu
Yuri Manin, Max Planck Institute for Mathematics manin@mpimbonn.mpg.de

Saturday October 23, 2004, 9:30 a.m.11:15 a.m.
Special Session on Index Theory, Morse Theory, and the Witten Deformation Method, I
Room L 221, Technological Institute
Organizers:
Igor Prokhorenkov, Texas Christian University i.prokhorenkov@tcu.edu
Ken Richardson, Texas Christian University k.richardson@tcu.edu

Saturday October 23, 2004, 9:30 a.m.11:00 a.m.
Special Presentation, Part I
TA Development using case studies: A workshop for faculty
Room L 170, Technological Institute
Organizers:
Diane Herrmann, University of Chicago

Saturday October 23, 2004, 10:00 a.m.10:50 a.m.
Special Session on Algebraic Topology: Interactions with Representation Theory and Algebraic Geometry, I
Room LG 68, Technological Institute
Organizers:
Paul G. Goerss, Northwestern University pgoerss@math.northwestern.edu
Jesper Kragh Grodal, University of Chicago jg@math.uchicago.edu
Brooke E. Shipley, University of Illinois at Chicago bshipley@math.uic.edu

Saturday October 23, 2004, 10:00 a.m.10:50 a.m.
Special Session on Geometric Aspects of the Langlands Program, I
Room L 251, Technological Institute
Organizers:
Edward Frenkel, University of California Berkeley frenkel@math.berkeley.edu
Dennis Gaitsgory, University of Chicago gaitsgde@math.uchicago.edu
Mark Goresky, Institute for Advanced Study goresky@ias.edu
Kari Vilonen, Northwestern University vilonen@math.northwestern.edu

Saturday October 23, 2004, 11:40 a.m.12:30 p.m.
Invited Address
Fractional dimensions in geometry and algebra.
Auditorium, Technological Institute
Yuri Manin*, Northwestern University

Saturday October 23, 2004, 1:00 p.m.2:00 p.m.
Special Presentation, Part II
TA Development using case studies: A workshop for faculty
Room L 170, Technological Institute
Organizers:
Diane Herrmann, University of Chicago

Saturday October 23, 2004, 2:00 p.m.2:50 p.m.
Invited Address
The geometry and topology of reconfiguration.
Auditorium, Technological Institute
Robert Ghrist*, University of Illinois, UrbanaChampaign, Mathematics
(100168396)

Saturday October 23, 2004, 3:00 p.m.5:50 p.m.
Special Session on Differential Geometry, II
Room MG 28, Technological Institute
Organizers:
Anders Ingemar Linner, Northern Illinois University linner@math.northwestern.edu
Hongyou Wu, Northern Illinois University wu@math.niu.edu

3:00 p.m.
Positive harmonic function on open manifolds with nonpositive curvature.
Jianguo Cao*, University of Notre Dame,
Huijun Fan, Peking University
Francois Leddreppier, Univeristy of Notre Dame
(100158220)

3:30 p.m.
KSurfaces (smooth and discrete) of nonfinite type.
Ivan Charles Sterling*, St Mary's College of Maryland
(100153265)

4:00 p.m.
Soliton surfaces in the mechanical equilibrium of closed membranes.
Brian Smyth*, University of Notre Dame
(100153271)

4:30 p.m.
Spectral properties of the FourierMukai transform.
James F. Glazebrook*, Eastern Illinois University and University of Illinois at UrbanaChampaign
Marcos Jardim, IMECCUNICAMP, Campinas, Brazil
Franz W. Kamber, University of Illinois at UrbanaChampaign
(10015815)

5:00 p.m.
Dupin hypersurfaces with four principal curvatures.
Thomas E Cecil, College of the Holy Cross
QuoShin Chi, Washington University
Gary R Jensen*, Washington University
(100153238)

Saturday October 23, 2004, 3:00 p.m.5:50 p.m.
Special Session on Stability Issues in Fluid Dynamics, II
Room L R4, Technological Institute
Organizers:
Susan J. Friedlander, University of Illinois at Chicago susan@math.uic.edu
Roman Shvydkoy, University of Illinois at Chicago shvydkoy@math.uic.edu

Saturday October 23, 2004, 3:00 p.m.5:50 p.m.
Special Session on Iterated Function Systems and Analysis on Fractals, II
Room L 160, Technological Institute
Organizers:
KaSing Lau, Chinese University of Hong Kong kslau@math.cuhk.edu.hk
Stephen S.T. Yau, University of Illinois at Chicago yau@uic.edu