AMS Sectional Meeting Full Program
Current as of Saturday, April 28, 2007 00:31:19
2007 Spring Western Section Meeting
Tucson, AZ, April 2122, 2007 (Saturday  Sunday)
Meeting #1027
Associate secretaries: Michel L Lapidus, AMS lapidus@math.ucr.edu, lapidus@mathserv.ucr.edu
Saturday April 21, 2007

Saturday April 21, 2007, 7:30 a.m.4:00 p.m.
Meeting Registration
Lobby, Integrated Learning Center 
Saturday April 21, 2007, 7:30 a.m.4:00 p.m.
Exhibit and Book Sale
Lobby, Integrated Learning Center 
Saturday April 21, 2007, 8:00 a.m.10:50 a.m.
Special Session on Number Theory in the Southwest, I
Room 310, Modern Languages
Organizers:
Dinesh S. Thakur, University of Arizona thakur@math.arizona.edu
Douglas L. Ulmer, University of Arizona ulmer@math.arizona.edu

8:00 a.m.
Modular forms mod p and relations among Heegner points.
Alexandru Buium*, University of New Mexico
Bjorn Poonen, University of California, Berkeley
(10271124) 
8:30 a.m.
Centralizers in Langlands dual groups over formal Taylor series.
D. Arinkin*, California Institute of Technology
(102711232) 
9:00 a.m.
Integral monodromy of curves with given $p$rank.
Rachel J. Pries*, Colorado State University
Jeff Achter, Colorado State University
(102711143) 
9:30 a.m.
Properties of Certain Weakly Holomorphic Modular Forms.
W. Duke, UCLA
P. Jenkins*, UCLA
(102711189) 
10:00 a.m.
Congruences among automorphic forms on U(2,2) and the BlochKato conjecture.
Krzysztof Klosin*, University of Utah
(10271196) 
10:30 a.m.
Subvarieties of Drinfeld Jacobians and congruences.
Mihran Papikian*, Stanford University
(102711160)

8:00 a.m.

Saturday April 21, 2007, 8:00 a.m.10:50 a.m.
Special Session on Representations of Algebras, I
Room 210, Modern Languages
Organizers:
Frauke Maria Bleher, University of Iowa fbleher@math.uiowa.edu
Birge K. HuisgenZimmermann, University of California Santa Barbara birge@math.ucsb.edu
Dan Zacharia, Syracuse University zacharia@mailbox.syr.edu

8:00 a.m.
Complexity and AR quivers of selfinjective algebras.
Edward L Green*, Virginia Tech
Dan Zacharia, Syracuse University
(102716151) 
8:30 a.m.
Onesided split torsion torsionfree triples in module categories.
Manuel Saorin*, Universidad de Murcia (SPAIN)
(10271643) 
9:00 a.m.
Reflections of Regular Algebras I.
Ellen E. Kirkman*, Wake Forest University
James J. Kuzmanovich, Wake Forest University
J. J. Zhang, University of Washington
(102716179) 
9:30 a.m.
Reflections of Regular Algebras II: Quantum Polynomial Algebras.
Ellen Kirkman, Wake Forest University
James Kuzmanovich*, Wake Forest University
James Zhang, University of Washington
(102716167) 
10:00 a.m.
Endostructure and Stackability of Nilpotent Linear Operators.
Claus Michael Ringel, Bielefeld University, Germany
Markus Schmidmeier*, Florida Atlantic University
(102747203) 
10:30 a.m.
Chain conditions for unital Leavitt path algebras.
Gene D. Abrams*, University of Colorado at Colorado Springs
Gonzalo Aranda Pino, Centre de Recerca Matem\'{a}tica, Bellaterra (Barcelona), SPAIN
Mercedes Siles Molina, Universidad de Malaga, Malaga, SPAIN
(10271647)

8:00 a.m.

Saturday April 21, 2007, 8:00 a.m.10:50 a.m.
Special Session on Mathematical Modeling in Biology and Medicine, I
Room 140, Integrated Learning Center
Organizers:
Carlos CastilloChavez, Arizona State University chavez@math.asu.edu
Yang Kuang, Arizona State University kuang@asu.edu
Hal L. Smith, Arizona State University halsmith@asu.edu
Horst R. Thieme, Arizona State University thieme@math.asu.edu

8:00 a.m.
A model for the dynamics and growth of bacterial colonies.
Joceline C. Lega*, University of Arizona
(102792238) 
8:30 a.m.
The Elastic Dynamics of Biological Growth.
Alain Goriely*, Department of Mathematics, University of Arizona
Rebecca Vandiver, Program in Applied Mathematics, University of Arizona
(102792129) 
9:00 a.m.
Bacterial Aggregation Dynamics.
David M Bortz*, University of Colorado
John G Younger, University of Michigan
(102792157) 
9:30 a.m.
Mathematical Models of A Neuron Firing.
J Abiva, Iowa University
F. Berezovskaya, Howard University
E. T. Camacho*, Loyola Marymount University
E. Joseph, University of the Virgin Islands
G. Karev, National Center for Biotechnological Information, National Institute of Health
A. Mikaelian, University of California, Davis
C. Rogers, University of Texas, El Paso
A. Wirkus, California State Polytechnic University, Pomona
(102792225) 
10:00 a.m.
Modeling Type 1 diabetes in NOD mice.
Joseph M. Mahaffy*, San Diego State University
(102792164) 
10:30 a.m.
Pattern formation with full cross diffusion effect.
Dung Le*, University of Texas at San Antonio
(10273582)

8:00 a.m.

Saturday April 21, 2007, 8:00 a.m.10:50 a.m.
Special Session on Automorphisms of Curves, I
Room 413, Modern Languages
Organizers:
Aaron D. Wootton, University of Portland wootton@up.edu
Anthony Weaver, Bronx Community College anthonyweaver@mac.com
S. Allen Broughton, RoseHulman Institute of Technology allen.broughton@rosehulman.edu

8:00 a.m.
Complete bipartite maps, factorisations of groups, and generalised Fermat curves.
Gareth A. Jones*, University of Southampton, Southampton, UK
(102720187) 
9:00 a.m.
Double coverings of hyperelliptic real algebraic curves.
Emilio Bujalance, Dep. Matematicas Fundamentales, UNED, Spain
Francisco Javier Cirre*, Dep. Matematicas Fundamentales, UNED, Spain
Jose Manuel Gamboa, Dep. Algebra, Facultad de Matematicas, UCM, Madrid, Spain
(102730162) 
9:30 a.m.
Generalized Fermat curves.
Gabino GonzalezDiez*, Universidad Aut\'onoma de Madrid. Spain.
Ruben Hidalgo, UTFSM, Valpara\'iso, Chile.
Maximiliano Leyton, UTFSM, Valpara\'iso, Chile
(102730113) 
10:00 a.m.
The Full Automorphism Group of a Cyclic $p$gonal Surface.
Aaron Wootton*, University of Portland
(10272079) 
10:30 a.m.
Canonical Forms for Conjugacy Classes of Prime Order Symplectic Matrices in $\mathbf{Sp(2g,{\mathbb{Z}})}$.
Jane Gilman*, RutgersNewark
(10272040)

8:00 a.m.

Saturday April 21, 2007, 8:00 a.m.10:40 a.m.
Special Session on Subjects in and Around Fluid Dynamics, I
Room 141, Integrated Learning Center
Organizers:
Robert Owczarek, Los Alamos National Laboratory rmo@lanl.gov
Mikhail Stepanov, University of Arizona stepanov@math.arizona.edu

8:00 a.m.
Plant patterns and phyllotaxis; A combination of mechanics and chemistry?
Allan C Newell*, Department of Mathematics, The University of Arizona
(10275158) 
9:00 a.m.
Path Integral Approach to Model/Data Assimilation.
Juan M Restrepo*, University of Arizona
(10277644) 
10:00 a.m.
Supercavitating flow of a free jet around wedges.
Y A Antipov*, Louisiana State University
V V Silvestrov, Gubkin Russian State University of Oil and Gas
A Y Zemlyanova, Louisiana State University
(102776124)

8:00 a.m.

Saturday April 21, 2007, 8:00 a.m.10:40 a.m.
Special Session on Spectral Analysis on Singular and Noncompact Manifolds, I
Room 125, Integrated Learning Center
Organizers:
Juan Bautista Gil, Pennyslvania State University jgil@psu.edu
Thomas Krainer, Pennsylvania State University krainer@psu.edu

8:00 a.m.
Regularized traces and Ktheory invariants of parametric pseudodifferential operators.
Matthias Lesch*, University of Bonn
(102758243) 
9:00 a.m.
Elliptic theory on orbifolds (after Bogdan Bucicovshi).
Dan Burghelea*, Department of Mathematics, OSU, Columbus, OH
(102753135) 
10:00 a.m.
Vertical BlowUps for Prescribed Mean Curvature Equations on Nonconvex Domains.
Thalia D. Jeffres*, Wichita State University
Kirk Lancaster, Wichita State University
(102735107)

8:00 a.m.

Saturday April 21, 2007, 8:30 a.m.10:50 a.m.
Special Session on Special Functions and Orthogonal Polynomials, I
Room 130, Integrated Learning Center
Organizers:
Diego Dominici, State University of New York at New Paltz dominicd@newpaltz.edu
Robert S. Maier, University of Arizona rsm@math.arizona.edu

8:30 a.m.
Infinite products with nonnegative integer coefficients.
Alexander Berkovich*, University of Florida , Gainesville
(102711139) 
9:00 a.m.
Tridiagonal pairs and the $q$tetrahedron algebra.
Paul M Terwilliger*, Department of Mathematics, University of Wisconsin
(10273363) 
9:30 a.m.
Inequalities and bounds for elliptic integrals.
Edward George Neuman*, Southern Illinois University Carbondale
(10273346) 
10:00 a.m.
New Cyclic Identities and Generalized Landen Transformation Formulas for Jacobi Elliptic Functions.
Uday P Sukhatme*, Department of Physics, Indiana University  Purdue University Indianapolis
Avinash Khare, Institute of Physics, Bhubaneswar, Orissa, India
(102733161) 
10:30 a.m.
Rational Landen transformations.
Victor H. Moll*, Tulane University, New Orleans, LA 70118
(10273330)

8:30 a.m.

Saturday April 21, 2007, 8:30 a.m.10:20 a.m.
Special Session on Inverse Problems for Wave Propagation, I
Room 137, Integrated Learning Center
Organizers:
Liliana Borcea, Rice University borcea@caam.rice.edu

8:30 a.m.
Title: Creating a new medical diagnostic tool by imaging shear stiffness in tissue.
Joyce R McLaughlin*, Rensselaer Polytechnic Institute
(10273537) 
9:30 a.m.
On the use of transmission eigenvalues to estimate the index of refraction from far field data.
Fioralba Cakoni*, University of Delaware
(10273526) 
10:00 a.m.
Direct imaging algorithms for extended targets.
Hongkai Zhao*, UC Irvine
(102765152)

8:30 a.m.

Saturday April 21, 2007, 8:30 a.m.10:50 a.m.
Special Session on Graph Theory and Combinatorics, I
Room 304, Modern Languages
Organizers:
Sebastian M. Cioaba, University of California at San Diego scioaba@math.ucsd.edu
Joshua Cooper, University of South Carolina cooper@math.sc.edu

8:30 a.m.
Perfect matchings in regular graphs from eigenvalues.
Sebastian M Cioab\u{a}*, University of California at San Diego
David A Gregory, Queen's University
Willem Haemers, Tilburg University
(10270583) 
9:00 a.m.
Set systems without a simplex or a cluster.
Peter Keevash*, Caltech
Dhruv Mubayi, University of Illinois, Chicago
(10270594) 
9:30 a.m.
Realizing Degree Sequences with Graphs having Nowherezero 3Flows.
Rong Luo, Middle Tennessee State University
Rui Xu*, University of West Georgia
Wenan Zang, University of Hong Kong
CunQuan Zhang, West Virginia University
(10270551) 
10:00 a.m.
New Models and Questions in Geometric Random Graphs.
Ross M. Richardson*, University of California, San Diego
(10270520) 
10:30 a.m.
Gallai Multigraphs.
Kyle Pula*, University of Denver
(10270508)

8:30 a.m.

Saturday April 21, 2007, 9:00 a.m.10:40 a.m.
Special Session on Partial Differential Equations and Geometric Analysis, I
Room 119, Integrated Learning Center
Organizers:
Sunhi Choi, University of Arizona schoi@math.arizona.edu
Lennie Friedlander, University of Arizona friedlan@math.arizona.edu
David Alan Glickenstein, University of Arizona glickenstein@math.arizona.edu

9:00 a.m.
Inverse Spectral Problems in Rectangular Domains.
Gregory Eskin, UCLA
James Ralston*, UCLA
(102735221) 
10:00 a.m.
The inverse problems for the Schrodinger equations with time dependent electromagnetic potentials and the AharonovBohm effect.
Gregory Eskin*, UCLA, Department of Mathematics
(10273552)

9:00 a.m.

Saturday April 21, 2007, 9:00 a.m.10:50 a.m.
Special Session on Algebraic Combinatorics, I
Room 303, Modern Languages
Organizers:
Helene Barcelo, Arizona State University barcelo@asu.edu
Susanna Fishel, Arizona State University fishel@math.la.asu.edu

9:00 a.m.
Cluster complexes of bordered surfaces.
Sergey Fomin*, University of Michigan
Michael Shapiro, Michigan State University
Dylan Thurston, Barnard College, Columbia University
(102705131) 
10:00 a.m.
FussCatalan combinatorics for finite Coxeter groups.
Drew Armstrong*, School of Mathematics, University of Minnesota
(102705183) 
10:30 a.m.
Multiordered Differential Posets.
Kendra S Killpatrick*, Pepperdine University
(102705156)

9:00 a.m.

Saturday April 21, 2007, 9:00 a.m.10:50 a.m.
Special Session on Operator Algebras, I
Room 411, Modern Languages
Organizers:
Steven P. Kaliszewski, Arizona State University kaliszewski@asu.edu
Jack Spielberg, Arizona State University Jack.Spielberg@asu.edu
John C. Quigg, Arizona State University quigg@asu.edu

9:00 a.m.
Nonstable $K$Theory of Unital Free Product C*Algebras.
Bruce Blackadar*, Department of Mathematics, University of Nevada, Reno
(102746191) 
10:00 a.m.
Recent progress on the Cuntz semigroup.
Andrew S. Toms*, York University, Toronto, Ontario, Canada
(10274631) 
10:30 a.m.
Applications of the Cuntz Semigroup.
Nate Brown*, Penn State University
(10274748)

9:00 a.m.

Saturday April 21, 2007, 9:00 a.m.10:40 a.m.
Special Session on Moduli Spaces and Invariant Theory, I
Room 202, Modern Languages
Organizers:
Philip Foth, University of Arizona foth@math.arizona.edu
Yi Hu, University of Arizona yhu@math.arizona.edu

9:00 a.m.
Higher Dimensional Generalizations of the Geometric Shafarevich Conjecture.
Sandor J Kovacs*, University of Washington
(102714118) 
10:00 a.m.
The orbifold Chow ring of hypertoric DeligneMumford stacks.
Yunfeng Jiang*, The University of British Columbia
(10271429)

9:00 a.m.

Saturday April 21, 2007, 9:30 a.m.10:50 a.m.
Special Session on New Developments and Directions in Random Matrix Theory, I
Room 314, Modern Languages
Organizers:
Peter David Miller, University of Michigan millerpd@umich.edu
Estelle Basor, California Polytechnic State University ebasor@calpoly.edu,

9:30 a.m.
Some properties of the largest eigenvalues of complex Wishart matrices for fairly general population covariance.
Noureddine El Karoui*, UC Berkeley/ Department of Statistics
(102762230) 
10:00 a.m.
Spike phenomena in some highdimensional eigenanalysis problems.
Debashis Paul*, Department of Statistics, University of California, Davis
(102762148) 
10:30 a.m.
CLTs for linear statistics of eigenvalues: A unified approach.
Sourav Chatterjee*, University of California at Berkeley
(10276085)

9:30 a.m.

Saturday April 21, 2007, 11:00 a.m.11:50 a.m.
Invited Address
The weak null condition and global existence for Einstein's equations.
Room 155, Integrated Learning Center
Hans Lindblad*, University of California, San Diego
(10270003) 
Saturday April 21, 2007, 2:00 p.m.2:50 p.m.
Invited Address
Array Imaging in Random Media.
Room 155, Integrated Learning Center
Liliana Borcea*, Rice University
(10273501) 
Saturday April 21, 2007, 3:00 p.m.5:50 p.m.
Special Session on Number Theory in the Southwest, II
Room 310, Modern Languages
Organizers:
Dinesh S. Thakur, University of Arizona thakur@math.arizona.edu
Douglas L. Ulmer, University of Arizona ulmer@math.arizona.edu

3:00 p.m.
On the Diophantine equation $y^2=x^6+k$.
Andrew Bremner*, Department of Mathematics and Statistics, Arizona State University
Nikos Tzanakis, Department of Mathematics, University of Iraklion, Crete.
(102711100) 
3:30 p.m.
Rational points on symmetric varieties.
Alexander Gorodnik*, CalTech
Hee Oh, Brown University
(10271190) 
4:00 p.m.
Epsilon factors for unitary groups.
Eric Wambach*, California Institute of Technology
(102711200) 
4:30 p.m.
Number Fields Unramified Away From 2.
John W Jones*, Arizona State University
(10271184) 
5:00 p.m.
Exceptional covers of surfaces.
Jeffrey D. Achter*, Colorado State University
(102714144) 
5:30 p.m.
A generalization of Jacobi's Derivative Formula to higher derivatives and characteristics.
David R Grant*, University of Colorado at Boulder
(102711133)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:40 p.m.
Special Session on Partial Differential Equations and Geometric Analysis, II
Room 119, Integrated Learning Center
Organizers:
Sunhi Choi, University of Arizona schoi@math.arizona.edu
Lennie Friedlander, University of Arizona friedlan@math.arizona.edu
David Alan Glickenstein, University of Arizona glickenstein@math.arizona.edu

3:00 p.m.
Pointwise multipliers of differentiable functions with applications to PDEs.
Tatyana Shaposhnikova*, Department of Mathematics, Ohio State University, and Department of Mathematics, Linkoeping University, Sweden
(102735117) 
4:00 p.m.
CMC foliations in asymptotically hyperbolic spaces.
Rafe Mazzeo*, Stanford University
Frank Pacard, Universite de Paris XII
(102758209) 
5:00 p.m.
Well posedness of the free surface Euler equations with or without surface tension.
Coutand Daniel, UC Davis
Steve Shkoller*, UC Davis
(102735218)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.4:50 p.m.
Special Session on Advances in Spectral Theory of Operators, I
Room 133, Integrated Learning Center
Organizers:
Roger Roybal, California State University, Channel Islands roger.roybal@csuci.edu
Michael D. Wills, Weber State University mwills@weber.edu

3:00 p.m.
Invariant Subspaces on the Slit Disk.
Alexandru Aleman, Lund University, Sweden
Nathan S Feldman*, Washington & Lee University
William T. Ross, University of Richmond
(102747224) 
3:30 p.m.
Approximating composition operator norms on the Dirichlet space.
Linda J Patton, California Polytechnic State University, San Luis Obispo
Marian E Robbins*, California Polytechnic State University, San Luis Obispo
(102747190) 
4:00 p.m.
Stable Invariant Subspaces.
Hassan Yousefi*, Dept of Math, Weber State University
(102747147) 
4:30 p.m.
A special compact operator.
Ramesh Garimella*, Department of Mathematics, University of Central Arkansas
Volodymyr Hrynkiv, Department of Mathematical Sciences, Worcester Polytechnic Institute
(102747130)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:40 p.m.
Special Session on New Developments and Directions in Random Matrix Theory, II
Room 314, Modern Languages
Organizers:
Peter David Miller, University of Michigan millerpd@umich.edu
Estelle Basor, California Polytechnic State University ebasor@calpoly.edu,

3:00 p.m.
Asymptotics for the determinants of a sum of finite Toeplitz and Hankel matrices generated by different symbols.
Estelle L Basor*, California Polytechnic State University
Torsten Ehrhardt, University of California at Santa Cruz
(102782188) 
3:30 p.m.
Szeg\"oWidom limit theorems for banddominated operators with almost periodic coefficients.
Torsten Ehrhardt*, University of California Santa Cruz
Bernd Silbermann, Technische Universit\"at Chemnitz, Germany
Steffen Roch, Technische Universit\"at Darmstadt, Germany
(102746159) 
4:00 p.m.
The Asymptotic Combinatorics and Dynamics of Random Matrices.
N M Ercolani*, University of Arizona
K D TR McLaughlin, University of Arizona
V U Pierce, The Ohio State University
(102705213) 
4:30 p.m.
$\overline{\partial}$ problems in random matrix theory.
Peter D. Miller*, University of Michigan
(102730165) 
5:00 p.m.
Discussion

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:20 p.m.
Special Session on Algebraic Combinatorics, II
Room 303, Modern Languages
Organizers:
Helene Barcelo, Arizona State University barcelo@asu.edu
Susanna Fishel, Arizona State University fishel@math.la.asu.edu

3:00 p.m.
An approach through combinatorics to intersection number questions for the moduli spaces of curves.
David Rhy\^s Jackson*, University of Waterloo
(10270535) 
4:00 p.m.
Enumerating Fayers partitions at a root of unity.
Monica Vazirani*, UC Davis
Chris Berg, UC Davis
(102705154) 
4:30 p.m.
Characters Polynomials and Kronecker Products.
Alain Goupil*, Universite du Quebec ŕ TroisRivieres
(10270589) 
5:00 p.m.
Uniqueness of Lifts of Specht Modules in the Symmetric Group.
James P Cossey*, University of Arizona
(10272012)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.6:20 p.m.
Special Session on Special Functions and Orthogonal Polynomials, II
Room 130, Integrated Learning Center
Organizers:
Diego Dominici, State University of New York at New Paltz dominicd@newpaltz.edu
Robert S. Maier, University of Arizona rsm@math.arizona.edu

3:00 p.m.
$C_{\ell}$ mock theta functions and ``positivity'' conjectures.
Stephen C. Milne*, The Ohio State University
(102733123) 
3:30 p.m.
Ramanujan's symmetric theta functions and their equations.
Seung H. Son*, University of Colorado at Colorado Springs
(10273369) 
4:00 p.m.
Wellpoised basic and elliptic Taylor expansions.
Michael J Schlosser*, University of Vienna
(102733219) 
4:30 p.m.
The SchottkyKlein prime function.
Darren G Crowdy*, Imperial College London & MIT
(10273055) 
5:00 p.m.
A generating function for the Nsoliton solutions of the KadomtsevPetviashvili II equation.
Sarbarish Chakravarty*, University of Colorado at Colorado Springs
(102733185) 
5:30 p.m.
Crossing Probabilities in Percolation and Stochastic L{\"o}wner Evolution and Modular Forms.
Peter Kleban*, University of Maine
Don Zagier, MaxPlanck Institut f{\"u}r Mathematik, Coll{\`e}ge de France
(102782111) 
6:00 p.m.
Discussion

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:50 p.m.
Special Session on Representations of Algebras, II
Room 210, Modern Languages
Organizers:
Frauke Maria Bleher, University of Iowa fbleher@math.uiowa.edu
Birge K. HuisgenZimmermann, University of California Santa Barbara birge@math.ucsb.edu
Dan Zacharia, Syracuse University zacharia@mailbox.syr.edu

3:00 p.m.
The combinatorics of quiver representations.
Harm Derksen*, University of Michigan
Jerzy Weyman, Northeastern University
(102716184) 
3:30 p.m.
Counterexamples to Okounkov's logconcavity conjecture.
Calin I Chindris*, University of Minnesota
Harm Derksen, University of Michigan
Jerzy Weyman, Northeastern University
(10271653) 
4:00 p.m.
The French Connection.
Roberto Mart\'{i}nez Villa, Instituto de Mathem\'{a}ticas, UNAM
Alex Martsinkovsky*, Northeastern University
(102716149) 
4:30 p.m.
Triangulated Surfaces and String Algebras.
Thomas Br\"ustle*, Bishops University and Universite de Sherbrooke
(102716180) 
5:00 p.m.
Stable equivalence of graded algebras.
Alex S. Dugas*, UC Santa Barbara
Roberto MartinezVilla, UNAM
(102716186) 
5:30 p.m.
Discussion.

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:20 p.m.
Special Session on Inverse Problems for Wave Propagation, II
Room 137, Integrated Learning Center
Organizers:
Liliana Borcea, Rice University borcea@caam.rice.edu

3:00 p.m.
Can one make objects invisible?
Gunther Uhlmann*, University of Washington
Allan Greenleaf, University of Rochester
Yaroslav Kurylev, Lougborough University
Matti Lassas, Helsinki University of Technology
(10273593) 
4:00 p.m.
Conductivity Imaging with a Single Measurement of Boundary and Interior Data.
Alexandru Tamasan*, University of Central Florida
Adrian Nachman, University of Toronto
Alexander Timonov, University of South Carolina Upstate
(10273559) 
4:30 p.m.
The inverse fluorescent source problem for optical molecular imaging of tissues.
Arnold D Kim*, University of California, Merced
(10277865) 
5:00 p.m.
Thermo/Photo/OptoAcoustic Tomography and Relativistically Acausal Acoustic Absorption Models.
Sarah K Patch*, UWMilwaukee, Department of Physics
(10274499)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:50 p.m.
Special Session on Mathematical Modeling in Biology and Medicine, II
Room 140, Integrated Learning Center
Organizers:
Carlos CastilloChavez, Arizona State University chavez@math.asu.edu
Yang Kuang, Arizona State University kuang@asu.edu
Hal L. Smith, Arizona State University halsmith@asu.edu
Horst R. Thieme, Arizona State University thieme@math.asu.edu

3:00 p.m.
Models of Hepatitis Delta Virus and its Drug Therapy.
Jonathan Forde*, University of Utah
(102792214) 
3:30 p.m.
Modeling Plague Dynamics in Natural Biological Systems.
Colleen T Webb*, Colorado State University
(102792172) 
4:00 p.m.
Existence of a DiseaseFree Equilibrium in an SIS Epidemic Patch Model When the Rate of Susceptible Dispersal Approaches Zero.
Linda J. S. Allen*, Texas Tech University
Ben M. Bolker, University of Florida
Yuan Lou, The Ohio State University
Andrew L. Nevai, The Ohio State University
(10279239) 
4:30 p.m.
Backward bifurcation in a discrete SIS model with vaccination.
Sophia R.J. Jang*, University of Louisiana at Lafayette
(102792170) 
5:00 p.m.
Mathematical modeling of malaria infection: the impact of treating asymptotic infection.
Xiaohong Wang*, Arizona State University
Carlos CastilloChavez, Arizona State University
Ananias Escalante, Arizona State University
Priscilla Greenwood, Arizona State University
(102792211) 
5:30 p.m.
A SEIRS model for influenza epidemic with antiviral agent treatment.
Abdessamad Tridane*, Arizona State University
Horst Thieme, Arizona State University
Yang Kuang, Arizona State University
(102792106)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:50 p.m.
Special Session on Automorphisms of Curves, II
Room 413, Modern Languages
Organizers:
Aaron D. Wootton, University of Portland wootton@up.edu
Anthony Weaver, Bronx Community College anthonyweaver@mac.com
S. Allen Broughton, RoseHulman Institute of Technology allen.broughton@rosehulman.edu

3:00 p.m.
Classifying Pairs of Fuchsian Groups of Finite Type.
S. Allen Broughton*, RoseHulman Institute of Technology
(102714104) 
3:30 p.m.
Triangle Fuchsian groups and surfaces with many automorphisms.
Ernesto Girondo*, Departamento de Matematicas. Instituto de Matematicas y Fisica FundamentalIMAFF. CSIC. Madrid (Spain)
(102730125) 
4:00 p.m.
Vanishings of Theta on the Jacobian of Bring's Curve (Numerical Results).
James S Wolper*, Idaho State University
(102714228) 
4:30 p.m.
Invariant Spin Structures on Riemann Surfaces.
Denis K. Sjerve*, University of British Columbia
Sadok Kallel, Universite de Lille I
(10271474) 
5:00 p.m.
On endomorphism algebras of hyperelliptic jacobians.
Arsen Elkin*, Colorado State University
Yuri Zarhin, Pennsylvania State University
(102714158) 
5:30 p.m.
The relationship between pranks and automorphism groups.
Darren B Glass*, Gettysburg College
(10271478)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:50 p.m.
Special Session on Subjects in and Around Fluid Dynamics, II
Room 141, Integrated Learning Center
Organizers:
Robert Owczarek, Los Alamos National Laboratory rmo@lanl.gov
Mikhail Stepanov, University of Arizona stepanov@math.arizona.edu

3:00 p.m.
Dynamics of the vortex line in presence of another vortex.
V E Zakharov*, Univeristy of Arizona
(102776242) 
4:00 p.m.
Recent unique continuation results for the CH equation.
G. Misiolek*, University of Notre Dame
(10273557) 
5:00 p.m.
Kcontact structures and energy minimization.
Rafal Komendarczyk*, University of Pennsylvania
(10277681) 
5:30 p.m.
New results in modeling of acoustic stimulation of oil recovery.
Robert Michal Owczarek*, Los Alamos National Laboratory
(10277671)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:20 p.m.
Special Session on Operator Algebras, II
Room 411, Modern Languages
Organizers:
Steven P. Kaliszewski, Arizona State University kaliszewski@asu.edu
Jack Spielberg, Arizona State University Jack.Spielberg@asu.edu
John C. Quigg, Arizona State University quigg@asu.edu

3:00 p.m.
Asymptotic Kasparov cycles and extensions.
Constantin Dorin Dumitrascu*, University of Arizona, Tucson, AZ
Radu Popescu, Instituto Superior Técnico, Lisbon, Portugal
(102719223) 
3:30 p.m.
Automorphisms of nonselfadjoint operator algebras of directed graphs.
Benton L. Duncan*, North Dakota State University
(10274621) 
4:00 p.m.
Crossed Products by Free Abelian Groups as Higherrank Graph Algebras.
Cynthia Farthing*, University of NebraskaLincoln
David Pask, University of Wollongong
Aidan Sims, University of Wollongong
(102746212) 
4:30 p.m.
The noncommutative Choquet boundary.
William Arveson*, University of California, Berkeley
(10274760) 
5:00 p.m.
Generalizedlow pass filters and the resulting isometries.
Judith A. Packer*, Department of Mathematics, University of Colorado, Boulder
(102746231)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:40 p.m.
Special Session on Moduli Spaces and Invariant Theory, II
Room 202, Modern Languages
Organizers:
Philip Foth, University of Arizona foth@math.arizona.edu
Yi Hu, University of Arizona yhu@math.arizona.edu

3:00 p.m.
Noncommutative moduli spaces.
Paul Hacking*, University of Washington
(102714115) 
4:00 p.m.
Variation of hyperplane sections.
Michael A van Opstall*, University of Utah
(10271432) 
5:00 p.m.
Are Artin stacks locally quotient stacks?
Jarod D. Alper*, Stanford University
(102714136)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:40 p.m.
Special Session on Spectral Analysis on Singular and Noncompact Manifolds, II
Room 125, Integrated Learning Center
Organizers:
Juan Bautista Gil, Pennyslvania State University jgil@psu.edu
Thomas Krainer, Pennsylvania State University krainer@psu.edu

3:00 p.m.
The $b$Dolbeault complex.
Gerardo A. Mendoza*, Temple University
(102732150) 
4:00 p.m.
Spectral Geometry and Asymptotically Conic Convergence.
J M Rowlett*, University of California at Santa Barbara
(10275861) 
5:00 p.m.
Elliptic operators on quasiasymptotically conic spaces.
Rafe Mazzeo*, Stanford University
Anda Degeratu, Max Planck Institut for Gravitationsphysik
(102758208)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.5:20 p.m.
Special Session on Graph Theory and Combinatorics, II
Room 304, Modern Languages
Organizers:
Sebastian M. Cioaba, University of California at San Diego scioaba@math.ucsd.edu
Joshua Cooper, University of South Carolina cooper@math.sc.edu

3:00 p.m.
Erd{\H o}sKoRado Theorems for Permutations and Set Partitions.
Cheng Yeaw Ku*, California Institute of Technology
David Renshaw, California Institute of Technology
(102705121) 
3:30 p.m.
Induced universal graphs for graphs with bounded maximum degree.
Steve Butler*, University of California, San Diego
(10270525) 
4:00 p.m.
Upper bounds on the independence number for weighted matrices of graphs.
Randall J Elzinga*, Queen's University at Kingston
(102705235) 
4:30 p.m.
Monomial Graphs of Girth at Least Eight.
Vasyl Dmytrenko, Temple University
Felix Lazebnik, University of Delaware
Jason Williford*, Worcester Polytechnic Institute
(102705217) 
5:00 p.m.
Equitable Coloring.
H. A. Kierstead*, Arizona State University
A. V. Kostochka, University of Illinois, Urbana
(10270562)

3:00 p.m.

Saturday April 21, 2007, 3:00 p.m.6:25 p.m.
Session on Contributed Paper Session
Room 312, Modern Languages

3:00 p.m.
Hessians, Warped Product and Eigenvalues.
Nelson Castaneda*, Central Connecticut State University
(10275814) 
3:15 p.m.
Stability of Krylov Subspace Spectral Methods.
James V Lambers*, Stanford University
(102765110) 
3:30 p.m.
Solving the inverse problem for a wave equation.
Rod A Freed*, California State University at Dominguez Hills
(10273510) 
3:45 p.m.
Existence and uniqueness of solutions to equations modeling compressible fluid flow with capillary stress effects.
Diane L. Denny*, Texas A&M University  Corpus Christi
(102735181) 
4:00 p.m.
The Influence of Unstable Modalities on Electrical Engineering.
Christopher James Kurtz*, Virtual University
(10279406) 
4:15 p.m.
Stability of Solutions to a Reaction Diffusion System Based on Chemical Reaction Kinetics.
Jisun Lim*, Department of Applied Mathematics, University of Colorado at Boulder
(10273518) 
4:30 p.m.
Dynamics of Stoichiometric Bacteriaalgae Interaction in Epilimnion.
Hao Wang*, Arizona State University
Hal Smith, Arizona State University
Yang Kuang, Arizona State University
James J Elser, Arizona State University
(10279205) 
4:45 p.m.
Probability of hitting treatment targets.
Rod Freed*, California State University Dominguez Hills
(10276011) 
5:00 p.m.
Quantum Computing and Quantum Number Theory.
James Kuodo Huang*, California Information Technology
(10276823) 
5:15 p.m.
On Uniserial Modules in the AuslanderReiten Quiver.
Ahmad Mojiri*, Texas A&M University  Texarkana
Axel Boldt, Metropolitan State University
(10271695) 
5:30 p.m.
Semidefinite Diagonal Directions Algorithm for Detecting Necessary Linear Matrix Inequality Constraints in Semidefinite Programming.
Shafiu Jibrin*, Northern Arizona University
Jackie Van Ryzin, St. Norbert College, De Pere, WI
(10279022) 
5:45 p.m.
On Groups with Excessive Davenport Constant.
Bryson W Finklea, St. John's College
Terri Moore, University of Nebraska
Vadim Ponomarenko*, San Diego State University
Zachary Turner, University of Houston
(102720175) 
6:00 p.m.
Numerical Range of Companion Matrices.
William Calbeck*, LSUAlexandria
(102715177) 
6:15 p.m.
Method of Infinite Ascend applied on A4 + nB4 = C2.
Susil Kumar Jena*, KIIT, University, Bhubaneswar751024, Orissa, India
(102711216)

3:00 p.m.
Sunday April 22, 2007

Sunday April 22, 2007, 8:00 a.m.12:00 p.m.
Meeting Registration
Lobby, Integrated Learning Center 
Sunday April 22, 2007, 8:00 a.m.10:50 a.m.
Special Session on Number Theory in the Southwest, III
Room 310, Modern Languages
Organizers:
Dinesh S. Thakur, University of Arizona thakur@math.arizona.edu
Douglas L. Ulmer, University of Arizona ulmer@math.arizona.edu

8:00 a.m.
Totally Degenerate Reduction and the Conjectures of Hodge and Tate.
Wayne M. Raskind*, University of Southern California
(102711141) 
8:30 a.m.
Orbits of rational points on certain $K3$ surfaces and the ample cone.
Arthur Baragar*, University of Nevada Las Vegas
(10271180) 
9:00 a.m.
Ktheory of logschemes.
Wieslawa Niziol*, University of Utah
(102711237) 
9:30 a.m.
Descent on the Congruent Number Elliptic Curves.
Nick Rogers*, University of Arizona
(102711222) 
10:00 a.m.
Lifting Puzzles for Siegel Modular Forms.
Cris Poor, Fordham University
Nathan C. Ryan*, UCLA
David S. Yuen, Lake Forest College
(10271186) 
10:30 a.m.
Periods of Drinfeld modules and difference Galois groups.
ChiehYu Chang, National TsingHua University
Matthew Papanikolas*, Texas A&M University
(102711155)

8:00 a.m.

Sunday April 22, 2007, 8:00 a.m.10:40 a.m.
Special Session on Partial Differential Equations and Geometric Analysis, III
Room 119, Integrated Learning Center
Organizers:
Sunhi Choi, University of Arizona schoi@math.arizona.edu
Lennie Friedlander, University of Arizona friedlan@math.arizona.edu
David Alan Glickenstein, University of Arizona glickenstein@math.arizona.edu

8:00 a.m.
Discussion 
9:00 a.m.
An eigenvalue estimate and a Brownian pursuit capture problem.
Andrejs E Treibergs*, University of Utah
(10275313) 
10:00 a.m.
Heat Kernel on Homogeneous Bundles over Symmetric Spaces.
Ivan G Avramidi*, New Mexico Institute of Mining and Technology
(102758173)

8:00 a.m.

Sunday April 22, 2007, 8:00 a.m.10:50 a.m.
Special Session on Special Functions and Orthogonal Polynomials, III
Room 130, Integrated Learning Center
Organizers:
Diego Dominici, State University of New York at New Paltz dominicd@newpaltz.edu
Robert S. Maier, University of Arizona rsm@math.arizona.edu

8:00 a.m.
The 192 Solutions of the Heun Equation.
Robert S. Maier*, University of Arizona
(102733233) 
8:30 a.m.
Fractional Integration and Fractional Differentiation for $d$dimensional Jacobi Expansions.
Cristina Balderrama, Universidad Central de Venezuela
Wilfredo O Urbina*, University of New Mexico & Universidad Central de Venezuela
(102733134) 
9:00 a.m.
Fractional Derivatives for Products of Airy Transforms.
Vladimir V Varlamov*, University of Texas  Pan American
(10273333) 
9:30 a.m.
The Asymptotic Zero Distribution for Partition Polynomials.
Robert P. Boyer*, Department of Mathematics; Drexel University
William M. Y. Goh, Department of Mathematics; Drexel University
(10273309) 
10:00 a.m.
Asymptotics of zeros of Hermite functions.
Martin E. Muldoon*, York Universlty
(10273341) 
10:30 a.m.
Asympototics of the Painlev\'e Equations.
Peter A Clarkson*, University of Kent, England
(10273350)

8:00 a.m.

Sunday April 22, 2007, 8:00 a.m.10:50 a.m.
Special Session on Representations of Algebras, III
Room 210, Modern Languages
Organizers:
Frauke Maria Bleher, University of Iowa fbleher@math.uiowa.edu
Birge K. HuisgenZimmermann, University of California Santa Barbara birge@math.ucsb.edu
Dan Zacharia, Syracuse University zacharia@mailbox.syr.edu

8:00 a.m.
Coxeter transformations: from Lie algebras to singularity theory.
Jose Antonio De la Pena*, UNAM, Mexico
(102716239) 
8:30 a.m.
Gabriel's Theorem on Quivers, BernsteinGelfandPonomarev's Reflection Functors, and Reduced Words in the Weyl Group.
Mark Kleiner*, Syracuse University
(102716145) 
9:00 a.m.
Complexes of Monomial Algebras.
Raymundo Bautista*, Instituto de Matematicas UNAM (Morelia)
(102716153) 
9:30 a.m.
Clusters and seeds in acyclic cluster algebras.
Aslak Bakke Buan, Institutt for matematiske fag, Norges teknisknaturvitenskapelige universitet
Robert J. Marsh, Department of Mathematics, University of Leicester
Idun Reiten, Institutt for matematiske fag, Norges teknisknaturvitenskapelige universitet
Gordana Glisa Todorov*, Northeastern University
(102716146) 
10:00 a.m.
QuasiMorphic Rings.
Victor P. Camillo*, University of Iowa
(10271675) 
10:30 a.m.
On commutative clean rings.
W. D. Burgess*, University of Ottawa
(10271692)

8:00 a.m.

Sunday April 22, 2007, 8:00 a.m.10:50 a.m.
Special Session on Mathematical Modeling in Biology and Medicine, III
Room 140, Integrated Learning Center
Organizers:
Carlos CastilloChavez, Arizona State University chavez@math.asu.edu
Yang Kuang, Arizona State University kuang@asu.edu
Hal L. Smith, Arizona State University halsmith@asu.edu
Horst R. Thieme, Arizona State University thieme@math.asu.edu

8:00 a.m.
Modelling the stability and robustness of lysogen in the bacteriophage $\lambda$.
Tomas Gedeon*, Montana State University
Kate Rardin, Montana State University
(10279266) 
8:30 a.m.
The role of resource types in the control of chemostats using feedback linearization.
Mary M Ballyk*, New Mexico State University
Ernest Barany, New Mexico State University
(102792174) 
9:00 a.m.
Some ProducerConsumer Population Models with Stoichiometric Constraints.
Bruce B Peckham*, Department of Mathematics and Statistics, University of Minnesota Duluth
Laura J Zimmermann, Ameriprise Financial, Mayfield Heights, OH
John Pastor, Department of Biology, University of Minnesota Duluth
Harlan W Stech, Department of Mathematics and Statistics, University of MInnesota Duluth
(102792137) 
9:30 a.m.
Continuous Versus Seasonal Reproduction in Discrete StageStructured Population Models.
Azmy S. Ackleh*, University of Louisiana at Lafayette
Youssef M. Dib, University of Louisiana at Lafayette
Sophia R.J. Jang, University of Louisiana at Lafayette
(102792176) 
10:00 a.m.
A discrete model for extinction and sustainability.
Saber N Elaydi*, Trinity University
(102739229) 
10:30 a.m.
Heteroclinic Cycles in the Chemostat Models and the Winnerless Competition Principle.
SzeBi Hsu, National Tsing Hua University, Taiwan
LihIng W Roeger*, Texas Tech University
(10279228)

8:00 a.m.

Sunday April 22, 2007, 8:00 a.m.10:50 a.m.
Special Session on Automorphisms of Curves, III
Room 413, Modern Languages
Organizers:
Aaron D. Wootton, University of Portland wootton@up.edu
Anthony Weaver, Bronx Community College anthonyweaver@mac.com
S. Allen Broughton, RoseHulman Institute of Technology allen.broughton@rosehulman.edu

8:00 a.m.
Combinatorial grouptheoretic methods in the study of automorphisms of maps and surfaces.
Marston D E Conder*, University of Auckland
(102720206) 
9:00 a.m.
Gapfilling for the Symmetric Genus of a Group.
Thomas W. Tucker*, Colgate University, Hamilton NY USA
Marston Conder, University of Auckland, Auckland, New Zealand
(102720226) 
9:30 a.m.
Strong Symmetric Genus and Generalized Symmetric Groups of Type $G(n,3)$.
Michael A Jackson*, King College
(102720101) 
10:00 a.m.
The symmetric crosscap number of the groups $C_{m}\times D_{n}$.
Jose Javier Etayo*, Dept. de Algebra, Universidad Complutense
Ernesto Martinez, Dept. Matematicas Fundamentales, UNED
(10272098) 
10:30 a.m.
The largest nongenus of ${\Bbb Z}_{pq}$ and the Frobenius problem.
Cormac O'Sullivan, Bronx Community College, City University of New York
Anthony Weaver*, Bronx Community College, City University of New York
(10271138)

8:00 a.m.

Sunday April 22, 2007, 8:00 a.m.10:40 a.m.
Special Session on Subjects in and Around Fluid Dynamics, III
Room 141, Integrated Learning Center
Organizers:
Robert Owczarek, Los Alamos National Laboratory rmo@lanl.gov
Mikhail Stepanov, University of Arizona stepanov@math.arizona.edu

8:00 a.m.
Bistability of optical bisolitons in optical fibers with dispersion management.
Ildar Gabitov*, University of Arizona
Robert Indik, University of Arizona
Pavel Lushnikov, University of New Mexico
Linn Mollenauer, University of Arizona
Maxim Shkarayev, University of Arizona
Mikhail Stepanov, University of Arizona
(102778234) 
9:00 a.m.
Loss Compensation in NanoStructured Materials.
Bridget R Kennedy*, Department of Mathematics, University of Arizona
Ildar Gabitov, Department of Mathematics, University of Arizona
Maxim Shkarayev, Department of Mathematics, University of Arizona
(102778236) 
10:00 a.m.
Collective stimulated Brillouin backscater.
Pavel M Lushnikov*, University of New Mexico
(10277873)

8:00 a.m.

Sunday April 22, 2007, 8:00 a.m.10:40 a.m.
Special Session on Spectral Analysis on Singular and Noncompact Manifolds, III
Room 125, Integrated Learning Center
Organizers:
Juan Bautista Gil, Pennyslvania State University jgil@psu.edu
Thomas Krainer, Pennsylvania State University krainer@psu.edu

8:00 a.m.
Derivatives of biharmonic functions near nonsmooth boundary.
Vladimir Maz'ya*, Department of Mathematics, Ohio State University, Department of Mathematical Sciences, University of Liverpool, UK
(102735120) 
9:00 a.m.
Spectral simplicity of the Laplacian on generic polygons.
Chris M Judge*, Indiana University, Bloomington
Luc Hillairet, Universite Nantes
(10275842) 
10:00 a.m.
Nodal Lines of Convex Ergodic Billiards.
John A Toth*, McGill University
(102735112)

8:00 a.m.

Sunday April 22, 2007, 8:00 a.m.12:00 p.m.
Exhibit and Book Sale
Lobby, Integrated Learning Center 
Sunday April 22, 2007, 8:30 a.m.10:20 a.m.
Special Session on Inverse Problems for Wave Propagation, III
Room 137, Integrated Learning Center
Organizers:
Liliana Borcea, Rice University borcea@caam.rice.edu

8:30 a.m.
Time Reversal in Randomly Layered Media.
JeanPierre Fouque*, University of California Santa Barbara
(10276064) 
9:30 a.m.
Optimal illumination and waveform design for imaging in random media.
Chrysoula Tsogka*, Dept. of Applied Mathematics, University of Crete
Liliana Borcea, Computational and Applied Mathematics, Rice University
George Papanicolaou, Department of Mathematics, Stanford University
(10276597) 
10:00 a.m.
Selective illumination of extended targets in array imaging.
Fernando Guevara Vasquez*, Stanford University
Liliana Borcea, Rice University
George Papanicolaou, Stanford University
(102735194)

8:30 a.m.

Sunday April 22, 2007, 8:30 a.m.10:50 a.m.
Special Session on Graph Theory and Combinatorics, III
Room 304, Modern Languages
Organizers:
Sebastian M. Cioaba, University of California at San Diego scioaba@math.ucsd.edu
Joshua Cooper, University of South Carolina cooper@math.sc.edu

8:30 a.m.
Constrained coloring problems for planar graphs.
Andr\'e K\"undgen*, Cal State San Marcos
(102705202) 
9:00 a.m.
The spectral gap of a random subgraph of a graph.
Fan Chung, UCSD
Paul K Horn*, UCSD
(102705204) 
9:30 a.m.
Distributed algorithms and graph theory.
Andrzej Czygrinow*, Department of Mathematics and Statistics, Arizona State University
(102705169) 
10:00 a.m.
Spectral supersaturation in graphs.
Vladimir Nikiforov*, University of Memphis, Tennessee, USA
(102705198) 
10:30 a.m.
Survey of Bulgarian Solitaire.
Brian Hopkins*, Saint Peter's College
(10270516)

8:30 a.m.

Sunday April 22, 2007, 9:00 a.m.10:50 a.m.
Special Session on Advances in Spectral Theory of Operators, II
Room 133, Integrated Learning Center
Organizers:
Roger Roybal, California State University, Channel Islands roger.roybal@csuci.edu
Michael D. Wills, Weber State University mwills@weber.edu

9:00 a.m.
Spectral pictures of $2$variable weighted shifts.
Ra\'ul E Curto*, University of Iowa
(10274788) 
9:30 a.m.
Spectra of some Toeplitz operators with almost periodic matrix symbols.
Ilya M Spitkovsky*, College of William and Mary
(102747201) 
10:00 a.m.
LagrangeSobolev Adjoints and LagrangeSobolev Symmetry of Ordinary Differential Expressions.
Lance Lee Littlejohn*, Department of Mathematics, Baylor University
Andrea Bruder, Department of Mathematics, Baylor University
Davut Tuncer, Department of Mathematics, Baylor University
(10273468) 
10:30 a.m.
Discussion

9:00 a.m.

Sunday April 22, 2007, 9:00 a.m.10:45 a.m.
Special Session on Algebraic Combinatorics, III
Room 303, Modern Languages
Organizers:
Helene Barcelo, Arizona State University barcelo@asu.edu
Susanna Fishel, Arizona State University fishel@math.la.asu.edu

9:00 a.m.
Picturing the compositions series of rational Cherednik algebra modules for the groups $G(r,p,n)$.
Stephen P. Griffeth*, University of Minnesota
(102705195) 
9:30 a.m.
A Schur expansion for Macdonald polynomials.
Sami Assaf*, University of California, Berkeley
(102705102) 
10:00 a.m.
tanalogues of principally specialized Schur functions.
Dennis Stanton*, School of Mathematics, University of Minnesota
(102705199)

9:00 a.m.

Sunday April 22, 2007, 9:00 a.m.10:50 a.m.
Special Session on Operator Algebras, III
Room 411, Modern Languages
Organizers:
Steven P. Kaliszewski, Arizona State University kaliszewski@asu.edu
Jack Spielberg, Arizona State University Jack.Spielberg@asu.edu
John C. Quigg, Arizona State University quigg@asu.edu

9:00 a.m.
Discussion 
10:00 a.m.
$C^*$algebras and selfsimilar groups.
Volodymyr Nekrashevych*, Texas A&M University, College Station, TX
(10274670) 
10:30 a.m.
Noncommutative Tduality and Pontryagin duality for groupoids.
Calder Daenzer*, University of Pennsylvania
(10271949)

9:00 a.m.

Sunday April 22, 2007, 9:00 a.m.10:40 a.m.
Special Session on Moduli Spaces and Invariant Theory, III
Room 202, Modern Languages
Organizers:
Philip Foth, University of Arizona foth@math.arizona.edu
Yi Hu, University of Arizona yhu@math.arizona.edu

9:00 a.m.
Boundaries of the Kahler Cone of CalabiYau manifolds.
Andrey Todorov*, UC Santa Cruz
(102714178) 
10:00 a.m.
The levelrank duality for nonabelian theta functions.
Alina Marian, Yale University
Dragos Oprea*, Stanford University
(10271417)

9:00 a.m.

Sunday April 22, 2007, 9:30 a.m.10:50 a.m.
Special Session on New Developments and Directions in Random Matrix Theory, III
Room 314, Modern Languages
Organizers:
Peter David Miller, University of Michigan millerpd@umich.edu
Estelle Basor, California Polytechnic State University ebasor@calpoly.edu,

9:30 a.m.
Beta ensembles: from old results (semicircle laws) to new (stochastic operators).
Ioana Dumitriu*, University of Washington, Seattle
(102760182) 
10:00 a.m.
Beta TracyWidom laws, random Schroedinger, and diffusion.
Jose Ramirez, Universidad de Costa Rica
Brian Rider*, University of Colorado at Boulder
Balint Virag, University of Toronto
(10276045) 
10:30 a.m.
New Results on the Symmetric Polynuclear Growth Model.
Toufic Suidan*, University of California, Santa Cruz
(102760220)

9:30 a.m.

Sunday April 22, 2007, 11:00 a.m.11:50 a.m.
Invited Address
Matrix Population Models and Semelparity.
Room 155, Integrated Learning Center
J M Cushing*, Department of Mathematics, Interdisciplinary Program in Applied Mathematics, University of Arizona
(10279202) 
Sunday April 22, 2007, 3:00 p.m.4:50 p.m.
Special Session on Number Theory in the Southwest, IV
Room 310, Modern Languages
Organizers:
Dinesh S. Thakur, University of Arizona thakur@math.arizona.edu
Douglas L. Ulmer, University of Arizona ulmer@math.arizona.edu

3:00 p.m.
On special values of $p$adic Lfunctions.
Adebisi Agboola*, UC Santa Barbara
(102711166) 
3:30 p.m.
Ranks of abelian varieties over function fields.
Lisa Berger*, University of Arizona
(102711193) 
4:00 p.m.
Irreducible polynomials over number fields.
S Jasbir Chahal*, Brigham Young University
(102711119) 
4:30 p.m.
ABC implies the Radicalized Vojta Height Inequality for curves.
Machiel van Frankenhuijsen*, Utah Valley State
(10271176)

3:00 p.m.

Sunday April 22, 2007, 3:00 p.m.4:50 p.m.
Special Session on Algebraic Combinatorics, IV
Room 303, Modern Languages
Organizers:
Helene Barcelo, Arizona State University barcelo@asu.edu
Susanna Fishel, Arizona State University fishel@math.la.asu.edu

3:00 p.m.
Physical Combinatorics.
Anne Schilling*, UC Davis
(10270536) 
4:00 p.m.
Representations arising from the Gosset graph.
R. M. Green*, University of Colorado at Boulder
(102705108) 
4:30 p.m.
Tensor factorization and Spin construction for KacMoody algebras.
Rajeev Walia*, Michigan State University
(102705207)

3:00 p.m.

Sunday April 22, 2007, 3:00 p.m.5:50 p.m.
Special Session on Special Functions and Orthogonal Polynomials, IV
Room 130, Integrated Learning Center
Organizers:
Diego Dominici, State University of New York at New Paltz dominicd@newpaltz.edu
Robert S. Maier, University of Arizona rsm@math.arizona.edu

3:00 p.m.
The thetaLaguerre calculus formulation of the Li/Keiper constants.
Mark W Coffey*, Colorado School of Mines
(10273354) 
3:30 p.m.
Nonlinear IntegralEquation Formulation of Orthogonal Polynomials.
Carl M. Bender*, Washington University in St. Louis and CNLS, Los Alamos National Laboratory
(102733109) 
4:00 p.m.
Orthogonal Polynomials and Leftdefinite Spectral Theory.
Lance L Littlejohn*, Department of Mathematics, Baylor University
(10273367) 
4:30 p.m.
Some examples of orthogonal matrix polynomials satisfying odd order differential equations.
Manuel D. de la Iglesia*, Universidad de Sevilla
Antonio J. Duran, Universidad de Sevilla
(10274256) 
5:00 p.m.
Multivariable polynomials and Lie algebras.
Alexander V Turbiner*, Instituto de Ciencias Nucleares, UNAM
(10273319) 
5:30 p.m.
Multiplicative Renormalization Method for Orthogonal Polynomials.
Suat Namli*, Louisiana State University
(102733163)

3:00 p.m.

Sunday April 22, 2007, 3:00 p.m.4:20 p.m.
Special Session on Representations of Algebras, IV
Room 210, Modern Languages
Organizers:
Frauke Maria Bleher, University of Iowa fbleher@math.uiowa.edu
Birge K. HuisgenZimmermann, University of California Santa Barbara birge@math.ucsb.edu
Dan Zacharia, Syracuse University zacharia@mailbox.syr.edu

3:00 p.m.
Quasitilted Rings.
Kent R Fuller*, University of Iowa
(102716114) 
3:30 p.m.
Discussion 
4:00 p.m.
Discussion

3:00 p.m.

Sunday April 22, 2007, 3:00 p.m.4:50 p.m.
Special Session on Inverse Problems for Wave Propagation, IV
Room 137, Integrated Learning Center
Organizers:
Liliana Borcea, Rice University borcea@caam.rice.edu

3:00 p.m.
Inclusion Detection in Laminar Media.
Knut Solna*, UC Irvine
(10273787) 
4:00 p.m.
Reverse Time Migration Using The AdjointState Method.
Eric A Dussaud*, Total E&P USA
William W. Symes, Rice University, Comp. and Applied Mathematics
(102786128) 
4:30 p.m.
Applying TimeReversal to Image Vertical Geologic Faults.
Joyce R. McLaughlin, Rensselaer Polytechnic Institute
Steven W. Roecker, Rensselaer Polytechnic Institute
JeongRock Yoon, Clemson University
Polina Zheglova*, Rensselaer Polytechnic Institute
(102786126)

3:00 p.m.

Sunday April 22, 2007, 3:00 p.m.5:50 p.m.
Special Session on Mathematical Modeling in Biology and Medicine, IV
Room 140, Integrated Learning Center
Organizers:
Carlos CastilloChavez, Arizona State University chavez@math.asu.edu
Yang Kuang, Arizona State University kuang@asu.edu
Hal L. Smith, Arizona State University halsmith@asu.edu
Horst R. Thieme, Arizona State University thieme@math.asu.edu

3:00 p.m.
Enhanced modeling of the glucoseinsulin system and its application in insulin therapies.
Haiyan Wang*, Arizona State University
(10279291) 
3:30 p.m.
Bimodal Epidemic Size Distributions for NearCritical SIR with Vaccination.
Luis F. Gordillo*, Mathematical and Theoretical Biology Institute, Department of Mathematics, Arizona State University
Stephen Marion, Department of Health Care and Epidemiology, University of British Columbia
Anders MartinLof, Department of Mathematics, Stockholm University
Priscilla Greenwood, Mathematical and Theoretical Biology Institute, Department of Mathematics, Arizona State University
(10279207) 
4:00 p.m.
Simple models for horizontal and vertical transmission.
Thanate Dhirasakdanon*, Department of Mathematics and Statistics, Arizona State University
Stan H. Faeth, School of Life Sciences, Arizona State University
Karl P. Hadeler, Department of Mathematics and Statistics, Arizona State University
Horst R. Thieme, Department of Mathematics and Statistics, Arizona State University
(102792205) 
4:30 p.m.
Microbial Quiescence, A Survival Strategy In Environmental Stress.
Tufail M Malik*, Arizona State University
Hal Smith, Arizona State University
(102737192) 
5:00 p.m.
Demographic Fluctuations in Structured Populations.
Joseph C Watkins*, Department of Mathematics, University of Arizona
(102792127) 
5:30 p.m.
Dynamics of Stoichiometric BacteriaAlgae Interactions in the Epilimnion.
Hao Wang*, Arizona State University
Hal L Smith, Arizona State University
Yang Kuang, Arizona State University
James J Elser, Arizona State University
(102792103)

3:00 p.m.

Sunday April 22, 2007, 3:00 p.m.6:00 p.m.
Special Session on Automorphisms of Curves, IV
Room 413, Modern Languages
Organizers:
Aaron D. Wootton, University of Portland wootton@up.edu
Anthony Weaver, Bronx Community College anthonyweaver@mac.com
S. Allen Broughton, RoseHulman Institute of Technology allen.broughton@rosehulman.edu

3:00 p.m.
Finite earthquakes and the associahedron.
Frederick P. Gardiner*, Brooklyn College, CUNY, Brooklyn, New York
Jun Hu, Brooklyn College, CUNY, NY
(10273027) 
3:30 p.m.
Some metric properties of the Teichm\"uller space of a Riemann surface rel a closed subset.
Sudeb Mitra*, Queens College of the City University of New York
(102732168) 
4:00 p.m.
Discussion

3:00 p.m.

Sunday April 22, 2007, 3:00 p.m.5:50 p.m.
Special Session on Subjects in and Around Fluid Dynamics, IV
Room 141, Integrated Learning Center
Organizers:
Robert Owczarek, Los Alamos National Laboratory rmo@lanl.gov
Mikhail Stepanov, University of Arizona stepanov@math.arizona.edu

3:00 p.m.
Freesurface hydrodynamics in conformal variables.
V E Zakharov*, University of Arizona
(102776196) 
4:00 p.m.
Irreversibility and chaos in shear flow carrying particles.
Alan L. Graham, Los Alamos National Laboratory
Marc Ingber, The University of New Mexico
Marina Popova, The University of New Mexico
Peter Vorobieff*, The University of New Mexico
(102776227) 
5:00 p.m.
Meandering Streams.
Keith Mertens*, Colorado State University
Vakhtang Putkaradze, Colorado State University
Peter Vorobieff, University of New Mexico
Bjorn Birnir, University of California Santa Barbra
(102797142) 
5:30 p.m.
Metal Melting After Explosion the first 30 Microsecunds.
Hanna E. Makaruk*, Los Alamos National Laboratory
(10277672)

3:00 p.m.

Sunday April 22, 2007, 3:00 p.m.5:40 p.m.
Special Session on Moduli Spaces and Invariant Theory, IV
Room 202, Modern Languages
Organizers:
Philip Foth, University of Arizona foth@math.arizona.edu
Yi Hu, University of Arizona yhu@math.arizona.edu

3:00 p.m.
Global quotient structure of moduli of orbifold stable maps.
HsianHua Tseng*, Department of Mathematics, University of British Columbia
(10271477) 
4:00 p.m.
Toric schemes over a discrete valuation ring and applications to compactification of very affine varieties.
Zhenhua Qu*, University of Texas  Austin
(102714171) 
5:00 p.m.
The infinitely near Borelfixed points on the Hilbert scheme.
Morgan P. Sherman*, California State University, Channel Islands
(102714132)

3:00 p.m.

Sunday April 22, 2007, 3:00 p.m.5:40 p.m.
Special Session on Spectral Analysis on Singular and Noncompact Manifolds, IV
Room 125, Integrated Learning Center
Organizers:
Juan Bautista Gil, Pennyslvania State University jgil@psu.edu
Thomas Krainer, Pennsylvania State University krainer@psu.edu

3:00 p.m.
Functional determinants for separable partial differential operators.
Klaus Kirsten*, Baylor University
(10275834) 
4:00 p.m.
The residue determinant from a topological point of view.
Frederic Rochon*, Stony Brook University
(102758116) 
5:00 p.m.
The eta invariant for quantum graphs.
Paul Loya, SUNY Binghamton
Patrick McDonald*, New College of Florida
(102758210)

3:00 p.m.