
AMS Sectional Meeting Program by Day
Current as of Saturday, April 23, 2005 00:22:16
Program 
Deadlines 
Registration/Housing/Etc. 
Inquiries: meet@ams.org
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
Saturday April 16, 2005

Saturday April 16, 2005, 7:15 a.m.4:00 p.m.
Meeting Registration
Foyer, Girvetz Hall

Saturday April 16, 2005, 7:15 a.m.4:00 p.m.
Exhibit and Book Sale
Foyer, Girvetz Hall

Saturday April 16, 2005, 8:00 a.m.10:50 a.m.
Special Session on Curvature in Group Theory and Combinatorics, I
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

Saturday April 16, 2005, 8:00 a.m.10:50 a.m.
Special Session on Algebraic Geometry and Combinatorics, I
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.
Polyhedral geometry in the McKay correspondence.
Diane Maclagan*, Rutgers University
(100714197)

8:30 a.m.
Stanley's convolution and Koszul duality for dual affine toric varieties.
Tom Braden*, University of Massachusetts, Amherst
Valery Lunts, Indiana University
(100714149)

9:00 a.m.
Ehrhart polynomials and stringy Betti numbers.
Mircea Mustata, University of Michigan, Ann Arbor
Sam Payne*, University of Michigan, Ann Arbor
(100714228)

9:30 a.m.
KazhdanLusztig polynomials for hypertoric varieties.
Ben T Webster*, University of California, Berkeley
(100714199)

10:00 a.m.
Syzygies, multigraded regularity and toric varieties.
Milena Hering*, University of Michigan
Hal Schenck, Texas A&M University
Greg Smith, Queens University, Ontario
(100714163)

10:30 a.m.
Cohomology of rational forms on toric varieties.
Anvar Mavlyutov*, Oklahoma State University
(100714203)

Saturday April 16, 2005, 8:00 a.m.10:50 a.m.
Special Session on Automorphisms of Surfaces, I
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

8:00 a.m.
Automorphism groups of compact Riemann surfaces.
Gareth A. Jones*, University of Southampton
(100720182)

9:00 a.m.
Hyperelliptic Handlebodies.
Jane Gilman*, RutgersNewark
Linda Keen, Lehman College, CUNY
(10072092)

9:30 a.m.
Trigonal Riemann surfaces with nonunique morphisms.
Milagros Izquierdo*, Link\"opings Universitet, Link\"oping, Sweden
Antonio Costa, UNED, Madrid, Spain
Daniel Ying, Link\"opings Universitet
(100720102)

10:00 a.m.
Hyperelliptic curves with reduced automorphism group $A_5$.
Tony Shaska*, University of Idaho
David Sevilla, Dpt. of Math., Stat. and Comput., University of Cantabria
(100714108)

10:30 a.m.
Ramified normal coverings of hyperelliptic Klein surfaces.
Emilio Bujalance, Department of Pure Mathematics, UNED, Spain
FranciscoJavier Cirre*, Department of Pure Mathematics, UNED, Spain
JoseManuel Gamboa, Department of Algebra, Universidad Complutense de Madrid
(100714138)

Saturday April 16, 2005, 8:00 a.m.10:50 a.m.
Special Session on Geometric Methods in Three Dimensions, I
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

8:00 a.m.
Finiteness of $3$manifolds via nonzero degree mappings.
J. Hyam Rubinstein*, Currently visiting UCDavis. Davis, Calfiornia 95616
Michel Boileau, Toulouse University
Shicheng Wang, Beijing University
(10075767)

9:00 a.m.
Asymptotic behavior of foliations.
Sergio R Fenley*, Florida State University
(10075785)

9:30 a.m.
Heegaard splittings and virtual fibers.
Joseph Maher*, California Institute of Technology
(10075763)

10:00 a.m.
Does a random 3manifold fiber over the circle?
Nathan M Dunfield*, Caltech
Dylan P. Thurston, Harvard
(10075795)

10:30 a.m.
Thin position of knots and 3manifolds.
Jennifer C Schultens*, University of California at Davis
Hugh Howards, Wake Forest University
(100757100)

Saturday April 16, 2005, 8:00 a.m.10:50 a.m.
Special Session on Geometry and Physics, I
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

Saturday April 16, 2005, 8:00 a.m.10:40 a.m.
Special Session on Ricci Flow/Riemannian Geometry, I
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

Saturday April 16, 2005, 8:30 a.m.10:50 a.m.
Special Session on Arithmetic Geometry, I
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

Saturday April 16, 2005, 8:30 a.m.10:50 a.m.
Special Session on Dynamical Systems in Neuroscience, I
Room 2115, Girvetz Hall Organizers: Eugene M. Izhikevich, The Neurosciences Institute Eugene.Izhikevich@nsi.edu

8:30 a.m.
Epineuronal Memory.
Frank Hoppensteadt*, Courant Institute of Mathematical Sciences, NYU
(10079231)

9:00 a.m.
Delays and noise in neural control.
John G Milton*, The Claremont Colleges
(10079235)

10:00 a.m.
Presynaptic switching: the dynamical neuromodulatorcontrolled synapse.
Gabriele Scheler*, ISLE
(10079244)

10:30 a.m.
Role of network dynamics in shaping spike timing reliability.
Maxim Bazhenov*, Salk Institute for Biological Studies, La Jolla, CA
Nikolai Rulkov, Institite for Nonlinear Science, UCSD, La Jolla, CA
(10079240)

Saturday April 16, 2005, 8:30 a.m.10:40 a.m.
Special Session on Recent Advances in Combinatorial Number Theory, I
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

Saturday April 16, 2005, 8:30 a.m.10:50 a.m.
Special Session on Noncommutative Geometry and Algebra, I
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.
noncommutative geometry and quiver algebras.
William CrawleyBoevey, University of Leeds
Pavel Etingof, MIT
Victor Ginzburg*, University of Chicago
(100716115)

9:00 a.m.
Rational Cherednik algebras and Hilbert schemes of points.
I. Gordon, Glasgow University
J. T. Stafford*, University of Michigan, Ann Arbor
(100716160)

9:30 a.m.
Deformed wreath products of preprojective algebras and their reflection functors.
Wee Liang Gan*, Massachusetts Institute of Technology
(10071666)

10:00 a.m.
Shift Operators and QuasiInvariants for Complex Reflection Groups.
Yuri Berest*, Cornell University
Oleg Chalykh, University of Leeds
(100716200)

10:30 a.m.
Brauer groups and resolutions of V/G (joint work with T. Petrov).
Vladimir Baranovsky*, UC Irvine
Tihomir Petrov, UC Irvine
(100718103)

Saturday April 16, 2005, 8:30 a.m.10:50 a.m.
Special Session on Representation Theory of Algebras (in Honor of Claus Michael Ringel), I
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.
Hochschild cohomology of algebras with homological ideals.
J. A. de la Pe\~na*, Instituto de Matem\'aticas, UNAM
Ch. Xi, Dept. of Mathematics, Beijing Normal University
(100718193)

9:00 a.m.
Diagram cohomology and deformations.
Anthony Giaquinto*, Loyola University Chicago
(100716202)

9:30 a.m.
Derived discrete artin algebras and generic complexes.
Raymundo Bautista*, Instituto de Matematicas (Morelia) Universidad Nacional Autonoma de Mexico
(100716133)

10:00 a.m.
Algebras with smallest resolutions of simple modules.
Mark Kleiner*, Syracuse University
Shashidhar Jagadeeshan, Centre for Learning, Bangalore, India
(100716201)

10:30 a.m.
Graded and Koszul Categories.
Roberto MartinezVilla*, Instituto de Matematicas, UNAM, Unidad Morlia,
Oeyvind Solberg, Trondheim University
(100716125)

Saturday April 16, 2005, 9:00 a.m.10:40 a.m.
Special Session on History of Mathematics, I
Room 2108, Girvetz Hall Organizers: Shawnee L. McMurran, California State University San Bernardino mcmurran@math.csusb.edu
James J. Tattersall, Providence College tat@providence.edu

Saturday April 16, 2005, 10:00 a.m.10:50 a.m.
Special Session on Complexity of Computation and Algorithms, I
Room 2116, Girvetz Hall Organizers: Mark Burgin, University of California Los Angeles mburgin@math.ucla.edu

Saturday April 16, 2005, 11:00 a.m.11:50 a.m.
Invited Address
Advances in advancing interfaces: New techniques for propagating fronts in wave propagation and materials sciences.
Room 1004, Girvetz Hall
James Sethian*, University of California Berkeley

Saturday April 16, 2005, 2:00 p.m.2:50 p.m.
Invited Address
Set addition and set multiplication.
Room 1004, Girvetz Hall
MeiChu Chang*, University of California, Riverside
(100705118)

Saturday April 16, 2005, 3:00 p.m.5:50 p.m.
Special Session on Complexity of Computation and Algorithms, II
Room 2116, Girvetz Hall Organizers: Mark Burgin, University of California Los Angeles mburgin@math.ucla.edu

3:00 p.m.
Complexity of information extraction in logical semantics.
Jaakko Hintikka*, Boston University
(10070362)

4:00 p.m.
AverageCase Complexity Bounds for Continuous Global Optimization.
James M. Calvin*, New Jersey Institute of Technology
(10076836)

4:30 p.m.
PolynomialTime Algorithms for Multivariate Linear Problems with FiniteOrder Weights.
Grzegorz W Wasilkowski*, Department of Computer Sience, University of Kentucky
(10076556)

5:00 p.m.
More General Machine Learners Yield More Complex or InformationPoor Learned Programs.
John Case*, CIS Dept., Univ.~of Delaware, Newark, DE
KehJian Chen, Inst.~of Info.~Science, Academica Sinica, Taipei, Taiwan
Sanjay Jain, SOC, National University of Singapore, ROS
Wolfgang Merkle, Math.~Institut, Universitaet Heidelberg, Heidelberg, Germany
James Royer, Dept.~of E. E. \& CS, Syracuse University, Syracuse, NY
(10070315)

5:30 p.m.
Circuit Principles and Weak Pigeonhole Variants.
Christopher J Pollett*, San Jose State University
Norman Danner, Wesleyan University
(10076826)

Saturday April 16, 2005, 3:00 p.m.5:50 p.m.
Special Session on Curvature in Group Theory and Combinatorics, II
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

Saturday April 16, 2005, 3:00 p.m.5:50 p.m.
Special Session on Function Theory, I
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

Saturday April 16, 2005, 3:00 p.m.5:50 p.m.
Special Session on Arithmetic Geometry, II
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

Saturday April 16, 2005, 3:00 p.m.5:50 p.m.
Special Session on Algebraic Geometry and Combinatorics, II
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

3:00 p.m.
Almostcommuting variety, Dmodules, and Cherednik Algebras.
Wee Liang Gan, MIT
Victor Ginzburg*, University of Chicago
(100714114)

3:30 p.m.
Tropical Compactifications.
Jenia Tevelev*, University of Texas at Austin
(100714107)

4:00 p.m.
MirkovicVilonen cycles and polytopes.
Joel Kamnitzer*, University of California, Berkeley
(10071489)

4:30 p.m.
Generalized double affine Hecke algebras of rank 1 and quantized Del Pezzo surfaces.
Pavel Etingof, Department of Mathematics, Massachusetts Institute of Technology
Alexei Oblomkov*, Department of Mathematics, Massachusetts Institute of Technology
Eric Rains, Department of Mathematics, University of California, Davis
(100716206)

5:00 p.m.
Horn systems and binomial ideals.
Laura Felicia Matusevich*, University of Pennsylvania
Alicia Dickenstein, Universidad de Buenos Aires
(100714181)

5:30 p.m.
On Demazure modules of affine SL(n).
Peter Magyar*, Michigan State University
(100705244)

Saturday April 16, 2005, 3:00 p.m.4:40 p.m.
Special Session on Dynamical Systems in Neuroscience, II
Room 2115, Girvetz Hall Organizers: Eugene M. Izhikevich, The Neurosciences Institute Eugene.Izhikevich@nsi.edu

Saturday April 16, 2005, 3:00 p.m.5:20 p.m.
Special Session on History of Mathematics, II
Room 2108, Girvetz Hall Organizers: Shawnee L. McMurran, California State University San Bernardino mcmurran@math.csusb.edu
James J. Tattersall, Providence College tat@providence.edu

3:00 p.m.
Mathematics at West Point in the Mid Twentieth Century.
V. Frederick Rickey*, United States Military Academy
(100701140)

3:30 p.m.
Thomas Harriot's communication of mathematics via symbols, tables, and page layout.
Janet L. Beery*, University of Redlands
(100701121)

4:00 p.m.
The National Academy of Sciences Unfit for `Linear Associative Algebra'?
Deborah A. Kent*, University of Virginia
(100701172)

4:30 p.m.
The Development of the Tree Method in Logic from 1934 to 1968.
Francine F. Abeles*, Department of Mathematics & Computer Science, Kean University
(10070177)

5:00 p.m.
Contributions by Women to Nineteenth Century American Mathematical Journals.
James J Tattersall*, Providence College
Shawnee L McMurran, California State University, San Bernardino
(100701165)

Saturday April 16, 2005, 3:00 p.m.5:40 p.m.
Special Session on Recent Advances in Combinatorial Number Theory, II
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

Saturday April 16, 2005, 3:00 p.m.5:50 p.m.
Special Session on Automorphisms of Surfaces, II
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

Saturday April 16, 2005, 3:00 p.m.5:50 p.m.
Special Session on Noncommutative Geometry and Algebra, II
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

3:00 p.m.
Hilbert Schemes, Perverse Bundles and DBundles.
David BenZvi*, U. Texas Austin
Thomas Nevins, U. Illinois UrbanaChampaign
Victor Ginzburg, U. Chicago
(100714159)

3:30 p.m.
Chern classes of singular varieties.
Thomas Nevins*, University of Illinois at UrbanaChampaign
(100714127)

4:00 p.m.
The action of the general linear group on the universal division algebra.
Zinovy Reichstein, University of British Columbia
Nikolaus Vonessen*, University of Montana
(100716147)

4:30 p.m.
On the CohenMacaulay property of multiplicative invariants.
Martin Lorenz*, Temple University
(100716124)

5:00 p.m.
Categories, Monoids and Geometry.
Gary Brookfield*, CalStateLA
(100716173)

5:30 p.m.
Duality for finite Hopf algebras explained by corings.
Stefaan Caenepeel, Free University Brussels (VUB)
Declan Quinn, Syracuse University
Serban Raianu*, California State University Dominguez Hills
(100716104)

Saturday April 16, 2005, 3:00 p.m.5:50 p.m.
Special Session on Geometric Methods in Three Dimensions, II
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

3:00 p.m.
Surgery formulas for Heegaard Floer homology and applications.
Peter S Ozsvath*, UC Berkeley
(100757168)

4:00 p.m.
Deforming closed hyperbolic 3manifolds.
Daryl Cooper, University of California, Santa Barbara
D. Darren Long, University of California, Santa Barbara
Morwen Thistlethwaite*, University of Tennessee
(10075771)

4:30 p.m.
Arithmetic knots in integral homology 3spheres.
Mark D. Baker*, Universite Rennes 1
Alan W. Reid, University of Texas
(100757219)

5:00 p.m.
All roots of unity are detected by the Apolynomial.
Eric B. Chesebro*, University of Texas  Austin
(10075796)

5:30 p.m.
Slender Knots.
Abigail Thompson*, UC Davis
Martin Scharlemann, UCSB
(100757156)

Saturday April 16, 2005, 3:00 p.m.5:50 p.m.
Special Session on Representation Theory of Algebras (in Honor of Claus Michael Ringel), II
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

3:00 p.m.
Settheoretic methods in tilting theory.
Paul C. Eklof*, University of California, Irvine
(100716130)

3:30 p.m.
On tame cluster algebras.
Thomas Br\"ustle*, Bishop's and Université de Sherbrooke
(100716179)

4:00 p.m.
One parameter families of modules for tame algebras.
Rita Zuazua*, IMATEMorelia
(100716222)

4:30 p.m.
Extension of an algebra by a representationfinite algebra and the extension form.
J. A. de la Pe\~na, Instituto de Matemáticas, UNAM
B, Tom\'e*, Depto. de Matemáticas, Facultad de Ciencias, UNAM
(100716192)

5:00 p.m.
A note on stable equivalences of Morita type.
Alex S Dugas*, UC Berkeley
Roberto Martinez Villa, Instituto de Matematicas, UNAM, Unidad Morelia
(100716227)

5:30 p.m.
Tilting objects in abelian categories and quasitilted rings.
Riccardo Colpi, Universitŕ di Padova
Kent R Fuller*, University of Iowa
(100716183)

Saturday April 16, 2005, 3:00 p.m.5:40 p.m.
Special Session on Geometry and Physics, II
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

Saturday April 16, 2005, 3:00 p.m.5:40 p.m.
Special Session on Ricci Flow/Riemannian Geometry, II
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

Saturday April 16, 2005, 3:00 p.m.5:55 p.m.
Session for Contributed Papers
Room 2124, Girvetz Hall

3:00 p.m.
Cantor Limit Set of a Topological Transformation Group on $S^1$.
Keying Guan*, Science College, Beijing Jiaotong University, P.R.China
Zuming Chen, Science College, Beijing Univ. of Aero.& Astro.
(10075299)

3:15 p.m.
The smooth irreducible representations of U(2).
Manouchehr Misaghian*, Department of Mathematics, Johnson C. Smith University
(100711106)

3:30 p.m.
SelfConjugate $t$Core Partitions and $p$Blocks of $A_{n}$.
John Baldwin, Columbia University
Melissa Depwig, Sonoma State University
Ben Ford, Sonoma State University
Abe Kunin, MIT
Lawrence Sze*, California Polytechnic State University
(100705247)

3:45 p.m.
Sums of Powers of Arithmetic Progressions.
Hungping Tsao*, Novato, California
(10071161)

4:00 p.m.
Weakly periodiclike rings and commutativity.
Adil Yaqub*, University of California, Santa Barbara
(10071660)

4:15 p.m.
Approximate Solutions to Some Inverse Problems.
Rod Freed*, California State University at Dominguez Hills
(100747236)

4:30 p.m.
Another solution of the Gaussian white noise driven OrnsteinUhlenbeck equation.
Byung Soo Moon*, Utah State University
(100765151)

4:45 p.m.
Reduction of Mediainteractive Flow Equations of Burgers Type to Driven Diffusion Equations.
Roy B. Leipnik*, University of California at Santa Barbara
(10077673)

5:15 p.m.
Complexity of grammars with prohibition.
Mark Burgin*, UCLA
(10070355)

5:30 p.m.
The $2$Dog Group.
Richard P. Kubelka*, San Jose State University
(10072087)

5:45 p.m.
Equivalent Endomorphism Rings arising from Morita Contexts.
Pham Ngoc Anh, Alfred Renyi Mathematical Institute
Michael F Siddoway*, Colorado College
(100713113)
Inquiries: meet@ams.org

