AMS Sectional Meeting Program by Day
Current as of Saturday, April 23, 2005 00:22:17
2005 Spring Western Section Meeting
Santa Barbara, CA, April 1617, 2005
Meeting #1007
Associate secretaries: Michel L Lapidus, AMS lapidus@math.ucr.edu, lapidus@mathserv.ucr.edu
Sunday April 17, 2005

Sunday April 17, 2005, 8:00 a.m.12:00 p.m.
Exhibit and Book Sale
Foyer, Girvetz Hall 
Sunday April 17, 2005, 8:00 a.m.12:00 p.m.
Meeting Registration
Foyer, Girvetz Hall 
Sunday April 17, 2005, 8:00 a.m.10:50 a.m.
Special Session on Curvature in Group Theory and Combinatorics, III
Room 2119, Girvetz Hall
Organizers:
Laura M. Anderson, State University of New York at Binghamton laura@math.binghamton.edu
Noel Patrick Brady, University of Oklahoma nbrady@math.ou.edu
Robin Forman, Rice University forman@math.rice.edu
Jonathan P. McCammond, University of California Santa Barbara jon.mccammond@math.ucsb.edu

8:00 a.m.
How neighborly can a centrally symmetric polytope be?
Nathan Linial, Institute of Computer Science, Hebrew University, Jerusalem, Israel
Isabella Novik*, Department of Mathematics, University of Washington, Seattle, WA
(100705170) 
8:30 a.m.
A proof of Forman's combinatorial Weitzenb{\" o}ck decomposition and a combinatorial Gau{\ss}Bonnet theorem.
Carsten Lange*, Institut MittagLeffler
(100752231) 
9:00 a.m.
Surface Subgroups of Hyperbolizations of Groups.
Noel Brady, University of Oklahoma
Max Forester, University of Oklahoma
Eduardo Martinez*, University of Oklahoma
(100720154) 
9:30 a.m.
Nonorderable 3manifold groups.
Rachel Roberts, Washington University
John Shareshian*, Washington University
Melanie Stein, Trinity College
(100720211) 
10:00 a.m.
Distortion of surface groups in freebycyclic groups.
Josh Barnard*, University of Oklahoma
Noel Brady, University of Oklahoma
(100720186) 
10:30 a.m.
First and second order isoperimetric exponents of groups.
Noel Brady, University of Oklahoma
Martin Bridson, Imperial College London
Max Forester*, University of Oklahoma
Krishnan Shankar, University of Oklahoma
(100720174)

8:00 a.m.

Sunday April 17, 2005, 8:00 a.m.10:50 a.m.
Special Session on Function Theory, II
Room 2112, Girvetz Hall
Organizers:
Mihai Putinar, University of California Santa Barbara mputinar@math.ucsb.edu
Stephan R. Garcia, University of California Santa Barbara garcias@math.ucsb.edu

8:00 a.m.
DunfordPettis Properties and Spaces of Operators:Strong DunfordPettis Sets and Elton's Trichotomy.
Ioana Ghenciu*, University of WisconsinRiver Falls
Paul W. Lewis, University of North Texas
(100746109) 
8:30 a.m.
A Reproducing Kernel Condition for Indeterminacy in the Multidimensional Moment Problem.
Roger A. Roybal*, University of California, Santa Barbara
(100747249) 
9:00 a.m.
Surjective Toeplitz operators.
Andreas Hartmann, University of Bordeaux I
Donald Sarason*, University of California, Berkeley
Kristian Seip, Norwegian University of Science and Technology
(10074776) 
10:00 a.m.
State Space Realization For Contractive Functions On The Bidisc.
Joseph A. Ball, Virginia Tech
Cora Sadosky*, Howard University
Victor Vinnikov, Ben Gurion University of the Negev
(10074741) 
10:30 a.m.
Local Convergence of Boundary Values and the Behaviour inside Domain of Sequences of Meromorphic Functions.
Genrikh Ts. Tumarkin*, Santa Barbara, California
(10073043)

8:00 a.m.

Sunday April 17, 2005, 8:00 a.m.10:50 a.m.
Special Session on Algebraic Geometry and Combinatorics, III
Room 2120, Girvetz Hall
Organizers:
Alexander Yong, University of California Berkeley ayong@math.berkeley.edu
Allen Knutson, University of California Berkeley allenk@math.berkeley.edu

8:00 a.m.
All the GIT quotients at once.
Nicholas J Proudfoot*, University of Texas at Austin
(100714122) 
8:30 a.m.
Quivers and Combinatorics.
Harm Derksen*, University of Michigan
Jerzy Weyman, Northeastern University
(100716161) 
9:00 a.m.
Quivers, long exact sequences and Horn type inequalities.
Calin Ioan Chindris*, University of Michigan, Department of Mathematics
(100716169) 
9:30 a.m.
Gorenstein Schubert varieties.
Alexander K. Woo*, UCBerkeley
Alexander Yong, UCBerkeley
(100714111) 
10:00 a.m.
Singularities of Schubert Varieties, Tangent Cones and Bruhat Graphs.
Jim Carrell*, University of British Columbia
(100714153) 
10:30 a.m.
Dual Schubert cells in full flag varieties and Poisson geometry.
K. A. Brown, Univ. Glasgow
K. R. Goodearl, Univ. California, Santa Barbara
Milen Yakimov*, Univ. California, Santa Barbara
(100722230)

8:00 a.m.

Sunday April 17, 2005, 8:00 a.m.10:40 a.m.
Special Session on Geometry and Physics, III
Room 1112, Girvetz Hall
Organizers:
Xianzhe Dai, University of California Santa Barbara dai@math.ucsb.edu
Zhiqin Lu, University of California Irvine zlu@math.uci.edu

8:00 a.m.
Mirror symmetry and Langlands duality in the mixed Hodge structure of character varieties of Riemann surfaces.
Tamas Hausel*, University of Texas at Austin
(10075145) 
9:00 a.m.
Homological mirror symmetry for weighted projective spaces through constructible sheaves.
WeiDong Ruan*, University of Illinois at Chicago
(10075374) 
10:00 a.m.
Analytic torsion near singular CalabiYau threefolds.
Hao Fang*, Institute for Advanced Study
Zhiqin Lu, UC Irvine
KenIchi Yoshikawa, University of Tokyo
(10075368)

8:00 a.m.

Sunday April 17, 2005, 8:00 a.m.10:50 a.m.
Special Session on Ricci Flow/Riemannian Geometry, III
Room 1119, Girvetz Hall
Organizers:
Guofang Wei, University of California Santa Barbara wei@math.ucsb.edu
Rugang Ye, University of California Santa Barbara yer@math.ucsb.edu

8:00 a.m.
Generic Properties of Closed Parametrized Minimal Surfaces in Riemannian Manifolds.
John Douglas Moore*, University of California, Santa Barbara
(100753189) 
9:00 a.m.
Qualitative Properties of Solutions to the Yamabe Problem.
Marcus A Khuri*, Stanford University
(100753110) 
10:00 a.m.
Orbifolds and collapsing.
Yu Ding*, Department of Mathematics, Princeton University
(100753155) 
10:30 a.m.
Far Homotopies and the Tangent Cone at Infinity.
Will Wylie*, UCSB
(100753238)

8:00 a.m.

Sunday April 17, 2005, 8:30 a.m.10:50 a.m.
Special Session on Arithmetic Geometry, III
Room 2123, Girvetz Hall
Organizers:
Adebisi Agboola, University of California Santa Barbara agboola@math.ucsb.edu
Cristian Dumitru Popescu, University of California San Diego cpopescu@math.ucsd.edu

8:30 a.m.
Discussion and Open Problems

8:30 a.m.

Sunday April 17, 2005, 8:30 a.m.10:50 a.m.
Special Session on Dynamical Systems in Neuroscience, III
Room 2115, Girvetz Hall
Organizers:
Eugene M. Izhikevich, The Neurosciences Institute Eugene.Izhikevich@nsi.edu

8:30 a.m.
Numerical computation of phase response curves in Matlab.
Willy Govaerts, Ghent University
Bart Sautois*, Ghent University
(10073729) 
9:00 a.m.
The Response Dynamics of Neural Oscillator Populations.
Jeff Moehlis*, University of California, Santa Barbara
Eric Brown, Courant Institute
Philip Holmes, Princeton University
(10073720) 
10:00 a.m.
Estimating the entropy rate from observed time series, with confidence intervals.
Matthew B Kennel*, UC San Diego
Jose M. Amigo, Universidad Miguel Hernandez
(10076242) 
10:30 a.m.
Canard torus bifurcation in a two time scale neuron model.
Andrey Shilnikov*, GSU, Atlanta, GA
Gennady Cymbalyuk, GSU, Atlanta, GA
(10073722)

8:30 a.m.

Sunday April 17, 2005, 8:30 a.m.10:40 a.m.
Special Session on Recent Advances in Combinatorial Number Theory, III
Room 2127, Girvetz Hall
Organizers:
MeiChu Chang, University of California Riverside mcc@math.ucr.edu
Van Ha Vu, University of California San Diego vanvu@ucsd.edu

8:30 a.m.
Using new differentiable Dedekind sums to solve integer linear programming problems.
Sinai Robins*, Temple University
Helaman Ferguson, Supercomputing Center, Maryland
(100711229) 
9:00 a.m.
Incidences for algebraic surfaces.
Izabella Laba*, UBC
(100705212) 
10:00 a.m.
Erdos/Falconer distance problem in Euclidean space and on the sphere.
Alex Iosevich*, University of Missouri
(100705178)

8:30 a.m.

Sunday April 17, 2005, 8:30 a.m.10:50 a.m.
Special Session on Automorphisms of Surfaces, III
Room 1116, Girvetz Hall
Organizers:
Anthony Weaver, Bronx Community College of the City University of New York aweaver436@aol.com
Peter Turbek, Purdue University Calumet turbek@calumet.purdue.edu

8:30 a.m.
Some families of special compact Riemann surfaces of genus two.
Clifford J Earle*, Cornell University
(100730233) 
9:30 a.m.
Holomorphic motions in families of Riemann surfaces.
Sudeb Mitra*, Queens College, The City University of New York
(100732196) 
10:00 a.m.
Branched coverings of the sphere and Galois groups of trinomials.
Robert Guralnick, University of Southern California
John Shareshian*, Washington University
(100720210) 
10:30 a.m.
The genus distribution for odd order groups.
Jay J Zimmerman*, Towson University
(100757226)

8:30 a.m.

Sunday April 17, 2005, 8:30 a.m.10:50 a.m.
Special Session on Noncommutative Geometry and Algebra, III
Room 2129, Girvetz Hall
Organizers:
Kenneth R. Goodearl, University of California Santa Barbara goodearl@math.ucsb.edu
J. T. Stafford, University of Michigan jts@umich.edu
J. J. Zhang, University of Washington zhang@math.washington.edu

8:30 a.m.
Computation in noncommutative algebraic geometry.
Dennis S. Keeler*, Miami University
(100716239) 
9:00 a.m.
Two new families of 4dimensional ArtinSchelter regular algebras.
Brad S Shelton*, University of Oregon
Thomas Cassidy, Bucknell University
Peter Goetz, Bucknell University
(100716166) 
9:30 a.m.
Noncommutative Log terminal and canonical singularities of orders over surfaces.
Colin J Ingalls*, University of New Brunswick
Daniel Chan, University of New South Wales
(100716185) 
10:00 a.m.
Classifying Birationally Commutative Surfaces.
Daniel Rogalski*, MIT
(100716225) 
10:30 a.m.
Critical density in varieties.
Jason P Bell*, University of Michigan
(10071688)

8:30 a.m.

Sunday April 17, 2005, 8:30 a.m.10:50 a.m.
Special Session on Geometric Methods in Three Dimensions, III
Room 1115, Girvetz Hall
Organizers:
Daryl Cooper, University of California Santa Barbara cooper@math.ucsb.edu
David Darren Long, University of California Santa Barbara long@math.ucsb.edu
Martin G. Scharlemann, University of California Santa Barbara mgscharl@math.ucsb.edu

8:30 a.m.
Common stabilizaions of Heegaard splittings of link exteriors.
Jung Hoon Lee*, KAIST
Gyo Taek Jin, KAIST
(10075733) 
9:00 a.m.
Heegaard splittings and connected sums.
David Bachman*, Pitzer College
(10075751) 
9:30 a.m.
Alternate Heegaard genus bounds distance.
Martin Scharlemann, University of California, Santa Barbara
Maggy Tomova*, University of California, Santa Barbara
(100757101) 
10:00 a.m.
Large embedded balls and Heegaard genus in negative curvature.
David Bachman, Pitzer College
Daryl Cooper, University of California, Santa Barbara
Matthew E White*, California Polytechnic State University, San Luis Obispo
(100757224) 
10:30 a.m.
Links with no exceptional surgeries.
David Futer*, Stanford University
Jessica S Purcell, University of Texas at Austin
(10075730)

8:30 a.m.

Sunday April 17, 2005, 8:30 a.m.10:50 a.m.
Special Session on Representation Theory of Algebras (in Honor of Claus Michael Ringel), III
Room 2128, Girvetz Hall
Organizers:
Alex Martsinkovsky, Northeastern University a.martsinkovsky@neu.edu
Dan Zacharia, Syracuse University zacharia@syr.edu
Birge K. HuisgenZimmermann, University of California Santa Barbara birge@math.ucsb.edu
Edward L. Green, Virginia Polytech Institute & State University green@math.vt.edu

8:30 a.m.
Poset representations with coefficients in $\Bbb Z/(p^n)$ and in $k[T]/T^n$.
Markus Schmidmeier*, Mathematical Sciences, Florida Atlantic University
(100716177) 
9:00 a.m.
Polyhedral Geometry of McKay Quiver Representations for Abelian Groups.
Alastair Craw, SUNY Stony Brook
Diane Maclagan, Rutgers University
Rekha Thomas*, University of Washington
(100714180) 
9:30 a.m.
Tame actions on projective schemes over Nagata rings.
Frauke M Bleher*, University of Iowa
Ted Chinburg, University of Pennsylvania
(100716176) 
10:00 a.m.
Factorizations of the classical adjoint and maximal CohenMacaulay modules over the generic determinant.
RagnarOlaf Buchweitz, University of Toronto
Graham J Leuschke*, Syracuse University
(100713220) 
10:30 a.m.
Large Indecomposable Modules over Commutative Local Rings.
Lee Klingler*, Florida Atlantic University
W. Hassler, KarlFranzensUniversität Graz
R. Karr, Florida Atlantic University
R. Wiegand, University of NebraskaLincoln
(100713137)

8:30 a.m.

Sunday April 17, 2005, 9:00 a.m.10:50 a.m.
Special Session on Complexity of Computation and Algorithms, III
Room 2116, Girvetz Hall
Organizers:
Mark Burgin, University of California Los Angeles mburgin@math.ucla.edu

9:00 a.m.
Modeling Complexity of Living and Thinking Systems by Calculus of Iterations in Discrete Time and Space.
Vladimir Gontar*, BenGurion University of the Negev
(10076824) 
9:30 a.m.
Complexity of algorithms and program quality.
Mark Burgin*, UCLA
Narayan Debnath, Department of Computer Science, Winona State University
(10076850) 
10:00 a.m.
Complexity of problems and duality of measures.
Mark Burgin*

9:00 a.m.