
AMS Sectional Meeting Program by Day
Current as of Sunday, April 21, 2013 00:20:08
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Spring Western Sectional Meeting
University of Colorado Boulder, Boulder, CO
April 1314, 2013 (Saturday  Sunday)
Meeting #1089
Associate secretaries:
Michel L Lapidus, AMS lapidus@math.ucr.edu, lapidus@mathserv.ucr.edu
Saturday April 13, 2013

Saturday April 13, 2013, 7:30 a.m.4:00 p.m.
Book Sale and Exhibit
Lobby 2, Eaton Humanities

Saturday April 13, 2013, 7:30 a.m.4:00 p.m.
Meeting Registration
Lobby 1, Eaton Humanities

Saturday April 13, 2013, 8:00 a.m.10:40 a.m.
Special Session on Algebraic Geometry, I
Room 259, Hellems Arts and Sciences Organizers: Sebastian CasalainaMartin, University of Colorado casa@math.colorado.edu Renzo Cavalieri, Colorado State University Brendan Hassett, Rice University Jonathan Wise, University of Colorado

Saturday April 13, 2013, 8:00 a.m.10:50 a.m.
Special Session on Analysis of Dynamics of the Incompressible Fluids, I
Room 245, Eaton Humanities Organizers: Mimi Dai, University of Colorado, Boulder mimi.dai@colorado.edu Congming Li, University of Colorado, Boulder

Saturday April 13, 2013, 8:00 a.m.10:50 a.m.
Special Session on Arithmetic Statistics and Big Monodromy, I
Room 263, Hellems Arts and Sciences Organizers: Jeff Achter, Colorado State University achter@math.colostate.edu Chris Hall, University of Wyoming

Saturday April 13, 2013, 8:00 a.m.10:50 a.m.
Special Session on Cluster Algebras and Related Combinatorics, I
Room 191, Hellems Arts and Sciences Organizers: Gregg Musiker, University of Minnesota Kyungyong Lee, Wayne State University klee@math.wayne.edu Li Li, Oakland University

Saturday April 13, 2013, 8:00 a.m.10:50 a.m.
Special Session on Combinatorial Avenues in Representation Theory, I
Room 135, Eaton Humanities Organizers: Richard Green, University of Colorado Boulder Anne Shepler, University of North Texas ashepler@unt.edu Nathaniel Thiem, University of Colorado Boulder

Saturday April 13, 2013, 8:00 a.m.10:50 a.m.
Special Session on Dynamical Systems: Thermodynamic Formalism and Connections with Geometry, I
Room 229, Hellems Arts and Sciences Organizers: Keith Burns, Northwestern University Dan Thompson, The Ohio State University thompson@math.osu.edu

8:00 a.m.
Dynamical coherence and intrinsic ergodicity for partially hyperbolic diffeomorphisms isotopic to Anosov.
Todd Fisher*, Brigham Young University
Rafael Potrie, IMERL, Facultad de Ingenieria, Montevideo, Uruguay
Martin Sambarino, Universidad de la Republica, Montevideo, Uruguay
(10893756)

8:30 a.m.
Recurrent orbits and nontrivial paths in particular fractal billiard tables.
Robert G Niemeyer*, University of New Mexico, Albuquerque
Michel L Lapidus, University of California, Riverside
Joe P. Chen, Cornell University
Robyn L Miller, Cornell University
(108937113)

9:00 a.m.
On rotation entropy.
Christian Wolf*, The City College of New York
Tamara Kucherenko, The City College of New York
(108937130)

9:30 a.m.
The geometry of generalized rotation sets.
Tamara Kucherenko*, City College of New York
Christian Wolf, City College of New York
(108937331)

10:00 a.m.
Shifts of finite type with nearly full entropy.
Ronnie Lee Pavlov*, University of Denver
(108937216)

10:30 a.m.
Mixing Properties of the WeilPetersson geodesic flow.
Howard Masur*, University of Chicago
Keith Burns, Northwestern University
Carlos Matheus Santos, College de France
Amie Wilkinson, University of Chicago
(108937128)

Saturday April 13, 2013, 8:00 a.m.10:20 a.m.
Special Session on Dynamics and Arithmetic Geometry, I
Room 104, Hellems Arts and Sciences Organizers: Suion Ih, University of Colorado at Boulder ih@math.colorado.edu Thomas J. Tucker, University of Rochester

8:00 a.m.
The filled Julia set of a Drinfeld module.
Patrick Ingram*, Colorado State University
(108911315)

8:30 a.m.
Newton's Method in Global Fields.
Adam D Towsley*, CUNY Graduate Center
Xander Faber, University of Hawaii
(108911302)

9:00 a.m.
Heights in fields with splitting conditions.
Paul Fili*, University of Rochester
Zachary Miner, University of Texas at Austin
Clayton Petsche, Oregon State University
(108911262)

9:30 a.m.
A refined conjecture on factoring iterates of polynomials over finite fields.
Nigel Boston*, University of Wisconsin
(108911264)

10:00 a.m.
Arithmetic differential Galois theory and dynamics on projective space.
Alexandru Buium*, University of New Mexico, Albuquerque
Taylor Dupuy, University of New Mexico, Albuquerque
(10891177)

Saturday April 13, 2013, 8:00 a.m.10:40 a.m.
Special Session on Foundations of Computational Mathematics, I
Room 193, Hellems Arts and Sciences Organizers: Susan Margulies, Pennsylvania State University margulies@math.psu.edu Jesus De Loera, University of California, Davis

Saturday April 13, 2013, 8:00 a.m.10:20 a.m.
Special Session on Nonlinear Waves and Integrable Systems, I
Room 125, Eaton Humanities Organizers: Christopher W. Curtis, University of Colorado, Boulder Anton Dzhamay, University of Northern Colorado Willy Hereman, Colorado School of Mines Barbara Prinari, University of Colorado, Colorado Springs bprinari@uccs.edu

8:00 a.m.
On the stability analysis of periodic sineGordon traveling waves.
Peter D. Miller*, University of Michigan
(108935319)

8:30 a.m.
On the MaxwellBloch equations and the focusing nonlinear Schroedinger equation with nonzero boundary conditions and the BenjaminFeir instability.
Gino Biondini*, State University of New York at Buffalo
Emily Fagerstrom, State University of New York at Buffalo
Gregor Kovacic, Rensselaer Polytechnic Institute
(108935363)

9:00 a.m.
Stability of solutions for peakon equations.
Stephane Lafortune*, College of Charleston
Andrew N.W. Hone, University of Kent
(108935223)

9:30 a.m.
Numerical solution of the NovikovVeselov equation by the ISM and transverse instability of planewave soliton solutions.
Matti Lassas, University of Helsinki, Finland
Jennifer L Mueller*, Colorado State University
Samuli Siltanen, University of Helsinki, Finland
Andreas Stahel, Bern University of Applied Sciences, Engineering and Information Technology
Ryan Croke, Raytheon
(108935347)

10:00 a.m.
Exceptional Circles of Radial Potentials in TwoDimensional Inverse Scattering.
Michael E. Music, University of Kentucky
Peter A. Perry*, University of Kentucky
Samuli Siltanen, University of Helsinki
(108935196)

Saturday April 13, 2013, 8:00 a.m.10:40 a.m.
Special Session on Set Theory and Boolean Algebras, I
Room 177, Hellems Arts and Sciences Organizers: Natasha Dobrinen, University of Denver natasha.dobrinen@du.edu Don Monk, University of Colorado, Boulder

Saturday April 13, 2013, 8:00 a.m.10:40 a.m.
Special Session on Singular Spaces in Geometry, Topology, and Algebra, I
Room 145, Eaton Humanities Organizers: Greg Friedman, Texas Christian University greg.b.friedman@gmail.com Laurentiu Maxim, University of Wisconsin, Madison

8:00 a.m.
Hodge cohomology of stratified spaces.
Pierre Albin*, University of Illinois at UrbanaChampaign
Eric Leichtnam, Institut de Mathematiques de Jussieu
Rafe Mazzeo, Stanford University
Paolo Piazza, Sapienza Universita di Roma
(108958143)

9:00 a.m.
Geometry of orbit spaces of proper Lie groupoids.
Markus J Pflaum*, University of Colorado Boulder
Hessel Posthuma, University of Amsterdam, The Netherlands
Xiang Tang, Washington University, St. Louis, MO
(10895828)

10:00 a.m.
HighDimensional Topological Quantum Field Theory, Singularities of Maps, and Exotic Spheres.
Markus Banagl*, Heidelberg University
(108957171)

Saturday April 13, 2013, 8:00 a.m.10:50 a.m.
Special Session on Themes in Applied Mathematics: From Data Analysis through Fluid Flows and Biology to Topology, I
Room 1B80, Eaton Humanities Organizers: Hanna Makaruk, Los Alamos National Laboratory Robert Owczarek, University of New Mexico, and Enfitek, Inc owczarek@hughes.net

8:00 a.m.
Logarithmic scaling of critical collapse of Nonlinear Schrodinger equation.
Pavel M Lushnikov*, Department of Mathematics and Statistics, University of New Mexico
Sergey A Dyachenko, Department of Mathematics and Statistics, University of New Mexico
Natalia Vladimirova, Department of Mathematics and Statistics, University of New Mexico
(10897846)

8:30 a.m.
Phase transitions and collective oscillations in optical turbulence.
Natalia Vladimirova*, University of New Mexico
Gregory Falkovich, Weizmann Institute of Science
Pearson Miller, Yale University
(108978230)

9:00 a.m.
Solitons in dipolar BEC with 1/r interatomic potential.
Sergey A Dyachenko*, University of New Mexico
Pavel M Lushnikov, University of New Mexico
(108935324)

9:30 a.m.
VlasovPoisson model and it\rqs reduction for laserplasma 2D simulation.
Denis Albertovich Silantyev*, University of New Mexico, Albuquerque, New Mexico 87131, USA
Harvey Rose, New Mexico Consortium, Los Alamos, New Mexico 87544, USA
Pavel Lushnikov, University of New Mexico, Albuquerque, New Mexico 87131, USA
(108900346)

10:00 a.m.
Massconserved volumetric lattice Boltzmann method for biological flows with or without willfully moving boundaries.
Huidan Whitney Yu*, Department of Mechanical Engineering/Indiana UniversityPurdue University Indianapolis (IUPUI)
(10897666)

10:30 a.m.
Computational modeling of brain dynamics in traumatic scenarios  a new universal Brain Injury Criterion.
Igor Szczyrba*, University of Northern Colorado
Martin Burtscher, Texas State University  San Marcos
Rafal Szczyrba, Funiosoft, LLC
(108935180)

Saturday April 13, 2013, 8:30 a.m.10:50 a.m.
Special Session on Algebras, Lattices and Varieties, I
Room 255, Hellems Arts and Sciences Organizers: Keith A. Kearnes, University of Colorado, Boulder kearnes@euclid.colorado.edu Ágnes Szendrei, University of Colorado, Boulder

Saturday April 13, 2013, 8:30 a.m.10:50 a.m.
Special Session on Combinatorial and Computational Commutative Algebra and Algebraic Geometry, I
Room 251, Hellems Arts and Sciences Organizers: Hirotachi Abo, University of Idaho Zach Teitler, Boise State University Alexander Woo, University of Idaho awoo@uidaho.edu

8:30 a.m.
Regularity of squarefree monomial ideals and vertex decomposable complexes.
Tai Huy Ha*, Tulane University
Russ Woodroofe, Mississippi State University
(108913236)

9:00 a.m.
Latticepoint generating functions for free sums of polytopes.
Matthias Beck, San Francisco State University
Pallavi Jayawant, Bates College
Tyrrell B. McAllister*, University of Wyoming
(108952374)

9:30 a.m.
Matroids and stabilization of Kpolynomials.
Andrew Berget, University of Washington
Alex Fink*, North Carolina State University
(108905122)

10:00 a.m.
Secant Cumulants.
Mateusz Michalek, Max Planck Institute, Bonn Germany, and Mathematical Institute of the Polish Academy of Sciences, Warszawa Poland
Luke Oeding*, University of California, Berkeley
Piotr Zwiernik, Department of Statistics, University of California, Berkeley
(108914124)

10:30 a.m.
Eigenschemes and deformations in the tangent bundle.
Hirotachi Abo, University of Idaho
David Eklund, Colorado State University
Chris Peterson*, Colorado State University
(108914322)

Saturday April 13, 2013, 8:30 a.m.10:50 a.m.
Special Session on Extremal Graph Theory, I
Room 1B90, Eaton Humanities Organizers: Michael Ferrara, University of Colorado Denver michael.ferrara@ucdenver.edu Stephen Hartke, University of NebraskaLincoln Michael Jacobson, University of Colorado Denver

Saturday April 13, 2013, 8:30 a.m.10:50 a.m.
Special Session on Geometric Methods in the Representation Theory of Reductive Groups, I
Room 137, Hellems Arts and Sciences Organizers: J. Matthew Douglass, University of North Texas douglass@unt.edu Gerhard Roehrle, Ruhr Universitaet Bochum Rahbar Virk, University of Colorado Boulder

8:30 a.m.
Weyl group actions on the Springer sheaf.
Pramod N Achar*, Louisiana State University
Anthony Henderson, University of Sydney
Daniel Juteau, Université de Caen
Simon Riche, Université Blaise Pascal  ClermontFerrand II
(108920246)

9:00 a.m.
A geometric Ringel duality for nilpotent cones.
Carl Mautner*, Harvard University
(108920273)

9:30 a.m.
Cuspidal Local Systems and a Decomposition Involving Perverse Sheaves on the Nilpotent Cone.
Amber Russell*, University of Georgia
Laura Rider, Louisiana State University
(108918307)

10:00 a.m.
FourierDeligne transform and representations of the symmetric group.
Galyna Dobrovolska*, University of Chicago
(10892263)

10:30 a.m.
On qanalogues of the characteristic polynomials of some hyperplane arrangements.
Eric Sommers*, U of Massachusetts, Amherst and NSF
(108917207)

Saturday April 13, 2013, 8:30 a.m.10:50 a.m.
Special Session on Harmonic Analysis of Frames, Wavelets, and Tilings, I
Room 237, Hellems Arts and Sciences Organizers: Veronika Furst, Fort Lewis College Keri Kornelson, University of Oklahoma Eric Weber, Iowa State University esweber@iastate.edu

8:30 a.m.
Spectral property of Cantor measures with consecutive digits.
ChunKit Lai*, Department of Mathematics and Statistics,McMaster University.
XinRong Dai, Sun YatSen University, Guangzhou
XingGang He, Central China Normal University
(10894267)

9:00 a.m.
Tiling Properties of Spectra of Measures.
Dorin Ervin Dutkay, University of Central Florida
John Haussermann*, University of Central Florida
(108946260)

9:30 a.m.
Orthonormal Bases Generated by Cuntz Algebras.
Dorin Dutkay, University of central Florida
Gabriel Picioroaga*, University of South Dakota
MyungSin Song, Southern Illinois University Edwardsville
(10894245)

10:00 a.m.
Spectrally Optimal Frames for Erasures.
Deguang Han*, University of Central Florida
(10894647)

10:30 a.m.
The Fuglede conjecture in dimension one.
Dorin Ervin Dutkay*, University of Central Florida
(10894238)

Saturday April 13, 2013, 8:30 a.m.10:50 a.m.
Special Session on Noncommutative Geometry and Geometric Analysis, I
Room 190, Eaton Humanities Organizers: Carla Farsi, University of Colorado, Boulder Alexander Gorokhovsky, University of Colorado, Boulder Alexander.Gorokhovsky@colorado.edu

8:30 a.m.
Expanders, exact crossed products, and Ktheory for group C* algebras.
Paul Frank Baum*, Penn State University
(108946193)

9:00 a.m.
An approach to the Novikov conjecture.
Crichton Ogle, Ohio State University
Boris Tsygan*, Northwestern University
(108955365)

9:30 a.m.
New approaches to localization algebras.
Rufus Willett*, University of Hawaii at Manoa
(108919112)

10:00 a.m.
Positive scalar curvature, higher rho invariants and localization algebras.
Zhizhang Xie*, Vanderbilt University
Guoliang Yu, Texas A&M
(10895854)

10:30 a.m.
Calculations with analytic structures.
John Roe*, Penn State
(10895861)

Saturday April 13, 2013, 9:00 a.m.10:50 a.m.
Special Session on Associative Rings and Their Modules, I
Room 1B70, Eaton Humanities Organizers: Greg Oman, University of Colorado, Colorado Springs goman@uccs.edu Zak Mesyan, University of Colorado, Colorado Springs

Saturday April 13, 2013, 9:00 a.m.10:50 a.m.
Special Session on Diophantine Approximation on Manifolds and Fractals: Dynamics, Measure Theory and Schmidt Games, I
Room 180, Eaton Humanities Organizers: Wolfgang Schmidt, University of Colorado at Boulder Lior Fishman, University of North Texas lfishman@unt.edu

9:00 a.m.
Some Topics in Diophantine Approximation.
Wolfgang M Schmidt*, University of Colorado Boulder
(108911145)

10:00 a.m.
Strong $C^1$ Incompressibility, Badly Approximable Linear Forms, and Schmidt's Game.
Ryan Broderick*, Northwestern University
Lior Fishman, University of North Texas
David Simmons, The Ohio State University
(108937225)

10:30 a.m.
Intrinsic Approximation on Quadratic Varieties.
Lior Fishman, University of North Texas
Dmitry Kleinbock, Brandeis University
Keith Merrill*, Brandeis University
David Simmons, Ohio State University
(108911185)

Saturday April 13, 2013, 9:00 a.m.10:50 a.m.
Special Session on Elliptic Systems and Their Applications, I
Room 181, Hellems Arts and Sciences Organizers: Wenxiong Chen, Yeshiva University wchen@yu.edu Congming Li, University of Colorado at Boulder

Saturday April 13, 2013, 9:00 a.m.10:50 a.m.
Special Session on Number Theory with a Focus on Diophantine Equations and Recurrence Sequences, I
Room 186, Eaton Humanities Organizers: Patrick Ingram, Colorado State University pingram@math.colostate.edu Katherine E. Stange, University of Colorado, Boulder

Saturday April 13, 2013, 9:00 a.m.10:55 a.m.
Session on AMS Contributed Paper Session, I
Room 247, Hellems Arts and Sciences

9:00 a.m.
Using an Iterative Singular Value Decomposition Algorithm for Collaborative Filtering Problems.
Kourosh Modarresi*, Stanford, CA
(108915398)

9:15 a.m.
Algebraic Properties of Generalized Rijndaellike Ciphers.
Kevin W Bombardier*, Wichita State University
L. Babinkostova, Boise State University
M. Cole, University of Notre Dame
T. Morrell, Washington University in St. Louis
C. Scott, Colorado College
(108920244)

9:30 a.m.
An Algorithm for Solving the Convex Feasibility Problem With Linear Matrix Inequality Constraints and an Implementation for SecondOrder Cones.
Shafiu Jibrin*, Northern Arizona University
Bryan Karlovitz, West Chester University of Pennsylvania
(10899057)

9:45 a.m.
Elliptic Reciprocity.
Cory Scott*, Colorado College
Liljana Babinkostova, Boise State University
Kevin Bombadier, Wichita State University
Matthew Cole, Notre Dame University
Thomas Morrell, Washington State University in St. Louis
(10891464)

10:00 a.m.
Sparse Nearest Neighbor Selection for the Locally Linear Embedding Algorithm.
Lori Beth Ziegelmeier*, Colorado State University
Michael Kirby, Colorado State University
Chris Peterson, Colorado State University
(108949325)

10:15 a.m.
Perturbed Regeneration homotopies for finding all isolated solutions to a polynomial system.
Dan Bates, Colorado State University
Brent Davis, Colorado State University
David Eklund, Colorado State University
Eric Hanson*, Colorado State University
Chris Peterson, Colorado State University
(108914303)

10:30 a.m.
Relationship between generalized Kobayashi metric and hyperbolic metric.
Kourosh Tavakoli*, Oklahoma City University
(108930394)

10:45 a.m.
A cluster structure on some hyperbolic categories.
Ibrahim A Saleh*, University of Wisconsin Colleges
(108905133)

Saturday April 13, 2013, 11:10 a.m.12:00 p.m.
Invited Address
The shape of data.
Room 1B50, Eaton Humanities
Gunnar E. Carlsson*, Stanford University
(10895501)

Saturday April 13, 2013, 2:00 p.m.2:50 p.m.
Invited Address
Rational curves on symplectic varieties.
Room 1B50, Eaton Humanities
Brendan E. Hassett*, Rice University
(10891403)

Saturday April 13, 2013, 3:00 p.m.4:50 p.m.
Special Session on Advances in Mathematical Biology, I
Room 185, Hellems Arts and Sciences Organizers: Liming Wang, California State University, Los Angeles limingwang.math@gmail.com Jiangguo Liu, Colorado State University

3:00 p.m.
Modeling emergent properties of synthetic bacterial consortia.
Tomas Gedeon*, Department of Mathematical Sciences, MSU, BOZEMAN
Emily Harvey, Department of Mathematical Sciences, MSU, Bozeman
Jeffrey Heys, Department of Chemical and Biological Engineering, MSU, Bozeman
Ross Carlsson, Department of Chemical and Biological Engineering, MSU, Bozeman
(108992107)

3:30 p.m.
Mathematical modeling of the dynamic interaction between cancer stem cells and nonstem cancer cells.
Xinfeng Liu*, University of South Carolina
(108992160)

4:00 p.m.
PDE Network Models for River Populations.
Robert Carlson*, University of Colorado at Colorado Springs
Kurt Anderson, Department of Biology, University of California at Riverside
Jonathan Sarhad, Department of Biology, University of California at Riverside
(10899223)

4:30 p.m.
From molecules to development: revealing simple rules of biological clocks.
Qiong Yang*, Stanford University
James E. Ferrell, Stanford University
(10899208)

Saturday April 13, 2013, 3:00 p.m.5:40 p.m.
Special Session on Algebraic Geometry, II
Room 259, Hellems Arts and Sciences Organizers: Sebastian CasalainaMartin, University of Colorado casa@math.colorado.edu Renzo Cavalieri, Colorado State University Brendan Hassett, Rice University Jonathan Wise, University of Colorado

Saturday April 13, 2013, 3:00 p.m.5:20 p.m.
Special Session on Algebras, Lattices and Varieties, II
Room 255, Hellems Arts and Sciences Organizers: Keith A. Kearnes, University of Colorado, Boulder kearnes@euclid.colorado.edu Ágnes Szendrei, University of Colorado, Boulder

Saturday April 13, 2013, 3:00 p.m.5:20 p.m.
Special Session on Analysis of Dynamics of the Incompressible Fluids, II
Room 245, Eaton Humanities Organizers: Mimi Dai, University of Colorado, Boulder mimi.dai@colorado.edu Congming Li, University of Colorado, Boulder

3:00 p.m.
FokkerPlanck and Neuroscience.
Maria E. Schonbek*, University of California, Santa Cruz, Math Department
Jose A Carrillo, Imperial College London, Math department
Maria Gonzalez, ETSEIB  Departament de Matematica Aplicada I, Universitat Politecnica de Catalunya, E08028 Barcelona, Spain
Maria Gualdani, Mathematics Department George Washington University
(108976102)

3:30 p.m.
Almost sure existence of global weak solutions for NavierStokes equations.
Andrea R. Nahmod, University of Massachusetts
Natasa Pavlovic*, University of Texas at Austin
Gigliola Staffilani, Massachusetts Institute of Technology
(108935227)

4:00 p.m.
Norm Inflation for Generalized NavierStokes Equations.
Alexey Cheskidov, University of Illinois Chicago
Mimi Dai*, University of Colorado Boulder
(108935175)

4:30 p.m.
Phase field models for two phase flows in karstic geometry.
Xiaoming Wang*, Florida State University, Department of Mathematics
(108976263)

5:00 p.m.
The 2D EulerBoussinesq equations with a logarithmically supercritical velocity.
Durga KC, Oklahoma State University
Dipendra Regmi*, Oklahoma State University
Lizheng Tao, Oklahoma State University
Jiahong Wu, Oklahoma State University
(108935105)

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Arithmetic Statistics and Big Monodromy, II
Room 263, Hellems Arts and Sciences Organizers: Jeff Achter, Colorado State University achter@math.colostate.edu Chris Hall, University of Wyoming

3:00 p.m.
Counting Abelian Surfaces with Real Multiplication over $\mathbb{F}_q$.
Hilary Smallwood*, Colorado State University
(108911370)

3:30 p.m.
Enumerating abelian varieties using matrix groups.
Cassie L Williams*, James Madison University
(10891196)

4:00 p.m.
Dwork's unit root Lfunction for toric exponential sums.
C. Douglas Haessig*, University of Rochester, NY
(108911364)

4:30 p.m.
Statistics for ArtinSchreier covers over finite fields.
Alina Bucur*, UCSD
Chantal David, Concordia University
Brooke Feigon, CCNY
Matilde Lalin, Universite de Montreal
(108911329)

5:00 p.m.
Distribution of zeta zeroes of ArtinSchreier curves.
Chantal David*, Concordia University
(108911287)

5:30 p.m.
A lower bound for the $a$number of a wildly ramified $p$cover.
Bryden Cais*, University of Arizona
(108914248)

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Associative Rings and Their Modules, II
Room 1B70, Eaton Humanities Organizers: Greg Oman, University of Colorado, Colorado Springs goman@uccs.edu Zak Mesyan, University of Colorado, Colorado Springs

3:00 p.m.
Jacobson's Lemma, Drazin Inverses, and Strongly Clean Rings.
T.Y. Lam, University of California Berkeley
Pace P. Nielsen*, Brigham Young University
(10891650)

3:30 p.m.
Strongly Clean Triangular Matrix Rings.
Alexander J Diesl*, Wellesley College
Thomas J Dorsey, Center for Communications Research
Wolf Iberkleid, Nova Southeastern University
Ramiro LaFuenteRodriguez, Columbia College
Warren Wm. McGovern, Florida Atlantic University
(108916318)

4:00 p.m.
Rings of maximal clean index.
Alexander J. Diesl, Wellesley College
Thomas J. Dorsey*, IDA/CCRLa Jolla
(108916345)

4:30 p.m.
Rings with Dimension.
Lia Vas*, University of the Sciences
(10891668)

5:00 p.m.
Diagonalizing matrices over AW*algebras.
Chris Heunen, Oxford University
Manuel L. Reyes*, Bowdoin College
(108946134)

5:30 p.m.
Rings of Continuous Functions of Countable Range.
Warren W McGovern*, H.L. Wilkes Honors College, FAU
(108913301)

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Cluster Algebras and Related Combinatorics, II
Room 191, Hellems Arts and Sciences Organizers: Gregg Musiker, University of Minnesota Kyungyong Lee, Wayne State University klee@math.wayne.edu Li Li, Oakland University

3:00 p.m.
Mutationlinear algebra and universal geometric coefficients for cluster algebras.
Nathan Reading*, North Carolina State University
(108913291)

3:30 p.m.
Revisiting the combinatorics of generalized cluster complexes and generalized associahedra in finite types.
Christian Stump*, University of Hannover, Germany
(108905357)

4:00 p.m.
Wonder of sineGordon Ysystems.
Tomoki Nakanishi, Nagoya University
Salvatore Stella*, Northeastern University
(108913240)

4:30 p.m.
Dynamical systems that become singular in both directions.
Max Glick*, University of California, Berkeley
(108937229)

5:00 p.m.
The $AG$invariant for $(m+2)$angulations.
Lucas DavidRoesler*, Lebanon Valley College
(10891691)

5:30 p.m.
$c$vectors of acyclic cluster algebras.
David Speyer, University of Michigan
Hugh Thomas*, University of New Brunswick
(108913351)

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Combinatorial Avenues in Representation Theory, II
Room 135, Eaton Humanities Organizers: Richard Green, University of Colorado Boulder Anne Shepler, University of North Texas ashepler@unt.edu Nathaniel Thiem, University of Colorado Boulder

3:00 p.m.
Rational Schur algebras and their $q$analogues.
Stephen Doty*, Loyola University Chicago
(108916162)

3:30 p.m.
The partition algebra and the Kronecker coefficients.
Christopher Bowman, Institut de Mathematiques de Jussieu
Maud De Visscher, City University London
Rosa Orellana*, Dartmouth
(108920237)

4:00 p.m.
Electrical networks and Lie theory.
Thomas Lam*, University of Michigan
Pavlo Pylyavskyy, University of Minnesota
(10890579)

4:30 p.m.
Permutation modules for Brauer algebras.
Stephen Doty, Loyola University Chicago
Aaron Lauve*, Loyola University Chicago
George Seelinger, III, Loyola University Chicago
(108920238)

5:00 p.m.
McKay Centralizer Algebras I.
Tom Halverson*, Macalester College
Georgia Benkart, University of Wisconsin, Madison
(108920261)

5:30 p.m.
McKay Centralizer Algebras II.
Georgia Benkart*, University of WisconsinMadison
Tom Halverson, Macalester College
(108905269)

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Combinatorial and Computational Commutative Algebra and Algebraic Geometry, II
Room 251, Hellems Arts and Sciences Organizers: Hirotachi Abo, University of Idaho Zach Teitler, Boise State University Alexander Woo, University of Idaho awoo@uidaho.edu

3:00 p.m.
Applications of LusztigVogan Polynomials.
Peter E Trapa*, University of Utah
(108922266)

3:30 p.m.
The Action of $Sp_n$ on $\text{Flags}(\mathbb{C}^n)$.
Anna S. Bertiger*, Cornell University
(108914359)

4:00 p.m.
Arithmetically Gorenstein and Gorenstein Richardson Varieties in the Grassmannian.
Chayapa Darayon*, University of Illinois at UrbanaChampaign
(108914378)

4:30 p.m.
Factoring sums of Schubert polynomials.
Mahir B. Can, Tulane University
Michael Joyce, Tulane University
Benjamin J. Wyser*, University of Illinois at UrbanaChampaign
(108914387)

5:00 p.m.
Computations in equivariant quantum cohomology of Grassmannians.
Kaisa Taipale*, Cornell University, Ithaca, NY
Elizabeth Beazley, Haverford College, Haverford, PA
Anna Bertiger, Cornell University, Ithaca, NY
(108905371)

5:30 p.m.
Coxeter groups and Poincaré polynomials.
Edward Richmond*, University of British Columbia
William Slofstra, UC Davis
(108905220)

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Diophantine Approximation on Manifolds and Fractals: Dynamics, Measure Theory and Schmidt Games, II
Room 180, Eaton Humanities Organizers: Wolfgang Schmidt, University of Colorado at Boulder Lior Fishman, University of North Texas lfishman@unt.edu

3:00 p.m.
Schmidt games for billiards, interval exchange transformations and measured foliations.
Howard Masur*, University of Chicago
Jon Chaika, University of Chicago
Yitwah Cheung, San Francisco State
(10893253)

4:00 p.m.
Badly approximable directions on flat surfaces.
Jon Chaika*, University of Chicago/University of Utah
Yitwah Cheung, San Francisco State
Howard Masur, University of Chicago
(108951189)

4:30 p.m.
Absolute Schmidt's Game With Regrets.
Erez Nesharim*, Tel Aviv University
(108911195)

5:00 p.m.
Schmidt games and conditions on resonant sets.
Steffen Weil*, University of Zurich
(108951168)

5:30 p.m.
The distribution of rational points near planar curves and metric Diophantine approximation.
JingJing Huang*, University of Toronto
(108911242)

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Dynamical Systems: Thermodynamic Formalism and Connections with Geometry, II
Room 229, Hellems Arts and Sciences Organizers: Keith Burns, Northwestern University Dan Thompson, The Ohio State University thompson@math.osu.edu

3:00 p.m.
Thermodynamics of flows with cusps.
Godofredo Iommi, Pontificia Universidad Católica de Chile, Chile
Thomas Jordan, University of Bristol, UK
Mike Todd*, University of St Andrews, UK
(108937206)

3:30 p.m.
Counting geodesics connecting two base points through 'sectors'.
Bryce A. Weaver*, Indiana University
(108937279)

4:00 p.m.
Uniqueness of the measure of maximal entropy for the squarefree flow.
Ryan Peckner*, Princeton University
(108937138)

4:30 p.m.
Central limit theorems for the shrinking target problem.
Nicolai Haydn, University of Southern California
Matthew Nicol*, University of Houston
Sandro Vaienti, UMR7332 Centre de Physique Théorique, CNRS, Université d'AixMarseille, Université du Sud ToulonVar
Licheng Zhang, University of Houston
(108937280)

5:00 p.m.
Affine Invariant Submanifolds with Completely Degenerate KontsevichZorich Spectrum.
David Aulicino*, University of Chicago
(108937201)

5:30 p.m.
Thermodynamic Formalism, Riemann surfaces, the Laplacian and its determinant.
Mark Pollicott*, University of Warwick, UK
(108937313)

Saturday April 13, 2013, 3:00 p.m.5:40 p.m.
Special Session on Elliptic Systems and Their Applications, II
Room 181, Hellems Arts and Sciences Organizers: Wenxiong Chen, Yeshiva University wchen@yu.edu Congming Li, University of Colorado at Boulder

3:00 p.m.
Vortices for a TwoComponent GinzburgLandau System.
Stan Alama*, McMaster University
Qi Gao, McMaster University
(108935290)

3:30 p.m.
On higher order extensions for the fractional Laplacian.
Ray Yang*, Courant Institute for Mathematical Sciences, NYU
(108935310)

4:00 p.m.
Wellposedness of nematic liquid crystal flows in $L^3_{uloc}(R^3)$.
Changyou Wang*, University of Kentucky
Jay Hineman, University of Kentucky
(108935255)

4:30 p.m.
Oscillatory entire solutions of polyharmonic equations with power nonlinearities.
Monica Lazzo, University of Bari, Italy
Paul G Schmidt*, Auburn University, USA
(108935341)

5:00 p.m.
Discussion

Saturday April 13, 2013, 3:00 p.m.5:20 p.m.
Special Session on Extremal Graph Theory, II
Room 1B90, Eaton Humanities Organizers: Michael Ferrara, University of Colorado Denver michael.ferrara@ucdenver.edu Stephen Hartke, University of NebraskaLincoln Michael Jacobson, University of Colorado Denver

3:00 p.m.
All minorminimal apex obstructions that have connectivity two.
Csaba Biro, University of Louisville
Adam Jobson, University of Louisville
Andre Kezdy*, University of Louisville
(108905209)

3:30 p.m.
A Refinement of the CorrádiHajnal Theorem.
H. Kierstead, University of Illinois at UrbanaChampaign
A. Kostochka, University of Illinois at UrbanaChampaign
E. Yeager*, University of Illinois at UrbanaChampaign
(108905103)

4:00 p.m.
Theorems and conjectures extending the HajnalSzemerédi Theorem to directed graphs.
Andrzej Czygrinow, Arizona State University
Louis DeBiasio, Miami University
H. A. Kierstead*, Arizona State University
Theodore Molla, Arizona State University
(108905392)

4:30 p.m.
The semidegree threshold for antidirected Hamilton cycles.
Louis DeBiasio, Miami University
Theodore Molla*, Arizona State University
(108905349)

5:00 p.m.
Forbidden Subgraphs and Hamiltonian Connected Graphs.
Ronald J. Gould*, Emory University
(108905186)

Saturday April 13, 2013, 3:00 p.m.5:40 p.m.
Special Session on Foundations of Computational Mathematics, II
Room 193, Hellems Arts and Sciences Organizers: Susan Margulies, Pennsylvania State University margulies@math.psu.edu Jesus De Loera, University of California, Davis

Saturday April 13, 2013, 3:00 p.m.5:40 p.m.
Special Session on Geometric Methods in the Representation Theory of Reductive Groups, II
Room 137, Hellems Arts and Sciences Organizers: J. Matthew Douglass, University of North Texas douglass@unt.edu Gerhard Roehrle, Ruhr Universitaet Bochum Rahbar Virk, University of Colorado Boulder

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Harmonic Analysis of Frames, Wavelets, and Tilings, II
Room 237, Hellems Arts and Sciences Organizers: Veronika Furst, Fort Lewis College Keri Kornelson, University of Oklahoma Eric Weber, Iowa State University esweber@iastate.edu

Saturday April 13, 2013, 3:00 p.m.5:20 p.m.
Special Session on Noncommutative Geometry and Geometric Analysis, II
Room 190, Eaton Humanities Organizers: Carla Farsi, University of Colorado, Boulder Alexander Gorokhovsky, University of Colorado, Boulder Alexander.Gorokhovsky@colorado.edu

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Nonlinear Waves and Integrable Systems, II
Room 125, Eaton Humanities Organizers: Christopher W. Curtis, University of Colorado, Boulder Anton Dzhamay, University of Northern Colorado Willy Hereman, Colorado School of Mines Barbara Prinari, University of Colorado, Colorado Springs bprinari@uccs.edu

3:00 p.m.
Symbolic Computation of Lax Pairs of Systems of Partial Difference Equations Using Consistency Around the Cube.
Willy Hereman*, Department of Applied Mathematics and Statistics, Colorado School of Mines
Terry Bridgman, Department of Applied Mathematics and Statistics, Colorado School of Mines
(108939140)

3:30 p.m.
A geometric approach of discretizations of some partial differential equations.
Kenichi Maruno*, Department of Mathematics, University of Texas  Pan American
(108935253)

4:00 p.m.
Geometry of hyperbolic conservative systems.
Micahel Benfield, North Carolina State University
Helge Kristian Jenssen, Penn State University
Irina A. Kogan*, North Carolina State University
(108935101)

4:30 p.m.
Integrability and Symmetry Reduction for Maps.
Hector E Lomeli*, Instituto Tecnologico Autonomo de Mexico (ITAM)
(108937401)

5:00 p.m.
Direct Scattering Problem for ZakharovShabat system: characterization of scattering data.
Francesco Demontis*, Dep. of Mathematics, University of Cagliari, Italy
Cornelis van der Mee, Dep. of Mathematics, University of Cagliari, Italy
(10894544)

5:30 p.m.
Integrability of higher pentagram maps.
Fedor L Soloviev*, University of Toronto
Boris Khesin, University of Toronto
(108951232)

Saturday April 13, 2013, 3:00 p.m.4:50 p.m.
Special Session on Number Theory with a Focus on Diophantine Equations and Recurrence Sequences, II
Room 186, Eaton Humanities Organizers: Patrick Ingram, Colorado State University pingram@math.colostate.edu Katherine E. Stange, University of Colorado, Boulder

Saturday April 13, 2013, 3:00 p.m.5:40 p.m.
Special Session on Set Theory and Boolean Algebras, II
Room 177, Hellems Arts and Sciences Organizers: Natasha Dobrinen, University of Denver natasha.dobrinen@du.edu Don Monk, University of Colorado, Boulder

Saturday April 13, 2013, 3:00 p.m.5:40 p.m.
Special Session on Singular Spaces in Geometry, Topology, and Algebra, II
Room 145, Eaton Humanities Organizers: Greg Friedman, Texas Christian University greg.b.friedman@gmail.com Laurentiu Maxim, University of Wisconsin, Madison

Saturday April 13, 2013, 3:00 p.m.5:50 p.m.
Special Session on Themes in Applied Mathematics: From Data Analysis through Fluid Flows and Biology to Topology, II
Room 1B80, Eaton Humanities Organizers: Hanna Makaruk, Los Alamos National Laboratory Robert Owczarek, University of New Mexico, and Enfitek, Inc owczarek@hughes.net

3:00 p.m.
Permutations of Cubical Arrays.
Gregory P. Wene*, The University of Texas at San Antonio
(108917292)

3:30 p.m.
Optimal design of an inflatable, freestanding solar updraft tower.
Peter Vorobieff*, The University of New Mexico
Vakhtang Putkaradze, University of Alberta
Andrea Mammoli, The University of New Mexico
Nima Fathi, The University of New Mexico
(108939154)

4:00 p.m.
Practical Considerations for Analysis By Synthesis, a Real World Example using DARHT Radiography.
James L Carroll*, LANL
(108960144)

4:30 p.m.
3D object reconstruction from a single radiogram  outside of the Inverse Abel method.
Hanna E. Makaruk*, Los Alamos National Laboratory
(108968226)

5:00 p.m.
3D effects in axisymmetric reconstructions: theory, simulation and experiment.
Christopher Tomkins*, Los Alamos National Laboratory
Hanna Makaruk, Los Alamos National Laboratory
(108968372)

5:30 p.m.
Quantum Computing with Majorana Fermions.
Louis Hirsch Kauffman*, Math UIC, 851 South Morgan Street, Chicago, IL 606077045
(10895790)

Saturday April 13, 2013, 3:00 p.m.4:55 p.m.
Session on AMS Contributed Paper Session, II
Room 247, Hellems Arts and Sciences

3:15 p.m.
The 2D incompressible Boussinesq equation with vertical dissipation.
Dhanapati Adhikari*, Marywood University
(10893572)

3:30 p.m.
Invariant Based Phylogenetic Reconstruction Algorithms.
Joseph Rusinko*, Winthrop University
Brian Hipp, Winthrop University
(10899220)

3:45 p.m.
Biological Implications of the Mathematical Properties of Ciliate Genome Decryption.
Chris Anderson*, Lewis & Clark College
Marion Scheepers, Boise State University
Marlena Warner, University of Idaho
Helen Wauck, Gustavus Adolphus College
(108905156)

4:00 p.m.
Mathematical Representations of Ciliate Genome Decryption.
Chris Anderson, Lewis and Clark College
Marion Scheepers, Boise State University
Marlena Warner, University of Idaho
Helen Wauck*, Gustavus Adolphus College
(108905132)

4:15 p.m.
A nonconvex method to find a subspace mean on a disjoint union of grassmann manifolds.
Brent R Davis*, Colorado State University
Daniel Bates, Colorado State University
Chris Peterson, Colorado State University
Michael Kirby, Colorado State University
Justin Marks, Air Force Institute of Technology
(108949215)

4:30 p.m.
The Mathematics of Planet Earth in Schools.
Kurt Kreith*, University of California at Davis
(10899713)

4:45 p.m.
Free De Morgan and Free BooleDe Morgan Algebras.
Yuri Movsisyan*, Yerevan State University
(10890630)

Saturday April 13, 2013, 6:30 p.m.8:00 p.m.
Departments of Mathematics and Applied Mathematics Reception
Atrium, Koenig Alumni Center
Inquiries: meet@ams.org

