AMS Sectional Meeting Full Program
Current as of Saturday, May 4, 2013 00:21:20
Special Event or Lecture · Inquiries: meet@ams.org
Spring Central Sectional Meeting
Iowa State University, Ames, IA
April 2628, 2013 (Friday  Sunday)
Meeting #1090
Associate secretaries:
Georgia M. Benkart, AMS benkart@math.wisc.edu
Friday April 26, 2013

Friday April 26, 2013, 3:00 p.m.5:50 p.m.
Workshop on Combinatorics connected with the AMS Special Session on Algebraic and Geometric Combinatorics
Room 202, Carver
Organizers:
Sung Y. Song, Iowa State University sysong@iastate.edu
Paul Terwilliger, University of WisconsinMadison

3:00 p.m.
Small class association schemes obtained from cyclotomic classes.
Kathleen Nowak, Iowa State University
Sung Y Song*, Iowa State University
(109005408) 
3:30 p.m.
Constructions of Strongly Regular Graphs.
Elizabeth LaneHarvard*, Colorado State University
Tim Penttila, Colorado State University
(109005353) 
4:00 p.m.
Association schemes and fast matrix multiplication.
Jonathan D.H. Smith*, Iowa State University
(109005228) 
4:30 p.m.
An infinite cardinal version of Gallai's Theorem for colorings of $\mathbb{R}^n$.
Jeremy F Alm*, Illinois College
(109005229) 
5:00 p.m.
Sets of Complex Unit Vectors and DistanceRegular Graphs.
Junbo Huang*, University of Waterloo
(109005199)

3:00 p.m.

Friday April 26, 2013, 6:30 p.m.9:00 p.m.
Graduate Student Poster Session
Sun Room and South Ballroom, Memorial Union
Saturday April 27, 2013

Saturday April 27, 2013, 7:30 a.m.4:30 p.m.
Book Sale and Exhibit
Room 305, Carver 
Saturday April 27, 2013, 7:30 a.m.4:00 p.m.
Meeting Registration
Room 305, Carver 
Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Algebraic and Geometric Combinatorics, I
Room 74, Carver
Organizers:
Sung Y. Song, Iowa State University sysong@iastate.edu
Paul Terwilliger, University of WisconsinMadison

8:00 a.m.
The universal AskeyWilson algebra.
Paul M Terwilliger*, Math Department U. WisconsinMadison
(109005390) 
8:30 a.m.
On Semisimple Varietal Terwilliger Algebras Whose Nonprimary Ideals Are $1$dimensional.
Bangteng Xu*, Eastern Kentucky University
Kezheng Kuo, Hubei Normal University
(10900521) 
9:00 a.m.
Classification of Standard Commutative Nilpotent Table Algebras of Order $p^3$.
Caroline Kettlestrings*, Northern Illinois University
Harvey I Blau, Northern Illinois University
(109020317) 
9:30 a.m.
Subset bounds in association schemes and coherent configurations.
Jason Williford*, University of Wyoming
(109005431) 
10:00 a.m.
Cauchy Pairs and Cauchy Matrices.
Alison Gordon Lynch*, University of WisconsinMadison
(109015413) 
10:30 a.m.
Group schemes and fissions.
Kenneth W Johnson*, , Penn State Abington
(109005320)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Analysis, Dynamics and Geometry In and Around Teichmuller Spaces, I
Room 118, Carver
Organizers:
Alistair Fletcher, Northern Illinois University
Vladimir Markovic, California Institute of Technology
Dragomir Saric, Queens College CUNY dragomir.saric@qc.cuny.edu

9:00 a.m.
Lengths of closed geodesics.
Ara S. Basmajian*, CUNY, Graduate Center and Hunter College
(109030283) 
9:30 a.m.
Random Fibonacci dynamics and Caruso semigroups.
David Fried, Boston University
Sebastian M Marotta, University of the Pacific
Rich L Stankewitz*, Ball State University
(10903760) 
10:00 a.m.
Meridians and the Carathéodory Topology.
Mark David Comerford*, University of Rhode Island
(10903047) 
10:30 a.m.
The fast escaping set of a quasiregular mapping.
Alastair N Fletcher*, Northern Illinois University
(10903767)

9:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Commutative Algebra and its Environs, I
Room 8, Carver
Organizers:
Olgur Celikbas, University of Missouri, Columbia
Greg Piepmeyer, University of Missouri, Columbia ggpz95@mail.missouri.edu

8:30 a.m.
A curved perspective on complete intersections.
Mark E Walker*, University of Nebraska
(109013361) 
9:30 a.m.
Ranks and decompositions of modules.
Silvia Saccon*, University of Arizona
(109013386) 
10:00 a.m.
Duality for Koszul homology over Gorenstein rings.
Claudia Miller, Syracuse University
Hamid Rahmati*, Miami University
Janet Striuli, Fairfield University
(109013359) 
10:30 a.m.
Local rings of embedding codepth 3.
Lars Winther Christensen*, Texas Tech University
Oana Veliche, Northeastern University
(109013276)

8:30 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Commutative Ring Theory, I
Room 18, Carver
Organizers:
Michael Axtell, University of St. Thomas
Joe Stickles, Millikin University jstickles@millikin.edu

8:00 a.m.
Amalgamated Duplication, Pseudocanonical Covers, and Gorenstein Homological Algebra.
Pye Phyo Aung*, North Dakota State University
(10901809) 
8:30 a.m.
A Homological Approach to Factorization.
Jim Coykendall, North Dakota State University
Brandon Goodell*, North Dakota State University
(109013319) 
9:00 a.m.
Almost Dedekind domains and factorization.
Richard Erwin Hasenauer*, Eureka College
(109013105) 
9:30 a.m.
Chains of quadratic transforms of a regular local ring.
William Heinzer, Purdue University
K Alan Loper*, Ohio State University
Bruce Olberding, New Mexico State University
Hans Schoutens, CCNY
(109013304) 
10:00 a.m.
The Abian order and semilattice of annihilator classes for a reduced commutative ring.
David F. Anderson*, University of Tennessee
John D. LaGrange, Lindsey Wilson College
(109013130)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Computability and Complexity in Discrete and Continuous Worlds, I
Room 290, Carver
Organizers:
Jack Lutz, Iowa State University
Tim McNicholl, Iowa State University mcnichol@iastate.edu

8:00 a.m.
Computability in Topology and Analysis: On extendibility of functions and series of computable functions and their convergence to computable functions.
Iraj Kalantari*, Western Illinois University
(109003255) 
8:30 a.m.
Complexity dichotomy theorems for counting problems.
JinYi Cai*, University of WisconsinMadison
(109068375) 
9:00 a.m.
A Thirty Year Old Conjecture about Promise Problems.
Andrew Hughes, University at Buffalo
A Pavan*, Iowa State University
Nathan Russell, University at Buffalo
Alan Selman, University at Buffalo
(109068382) 
9:30 a.m.
Effectively closed sets and symbolic dynamics.
Douglas Cenzer*, Department of Mathematics, University of Florida
Sebastian Wyman, University of Florida
(109003206) 
10:00 a.m.
Mutual Dimension.
Adam Case*, Iowa State University
Jack H. Lutz, Iowa State University
(109068345) 
10:30 a.m.
The complexity of Grid Coloring.
Daniel Apon, University of Maryland at College Park, Dept of Computer Science
William Gasarch*, Univerisity of Maryland at College Park, University of Maryland
Kevin Lawler, Permanent, Berkely CA
(109005293)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Computational Advances on Special Functions and Tropical Geometry, I
Room 2, Carver
Organizers:
Lubjana Beshaj, Oakland University
Emma Previato, Boston University ep@bu.edu

9:00 a.m.
Hyperelliptic curves of genus 3 with extra involutions.
F Thompson*, Oakland University
L Beshaj, Oakland University
(10901462) 
9:30 a.m.
Generalized Humbert Schemes and Intersections of Humbert Surfaces.
Ernst Kani*, Dept. of Math. & Stats, Queen's University, Kingston, Ontario
(109014280) 
10:30 a.m.
Automorphisms Groups of pgonal Riemann Surfaces.
Mlagros Izquierdo*, Linköping University
Antonio F Costa, UNED
Gabriel Bartolini, Linköping University
(109014198)

9:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Control Theory and Qualitative Analysis of Partial Differential Equations, I
Room 132, Carver
Organizers:
George Avalos, University of NebraskaLincoln gavalos@math.unl.edu
Scott Hansen, Iowa State University

8:00 a.m.
Wellposedness and Stability of a PDE Model Arising in a 3D FluidStructure Interaction.
Thomas J Clark*, University of Nebraska  Lincoln
George Avalos, University of Nebraska  Lincoln
(109035330) 
8:30 a.m.
Persistency of Analyticity for QuasiLinear Equations: An EnergyLike Approach.
Yanqiu Guo*, Weizmann Institute of Science
Edriss S. Titi, University of California, Irvine & The Weizmann Institute of Science
(109035178) 
9:00 a.m.
Stabilization of voltageactuated piezoelectric beams with magnetic effects.
Ozkan Ozer*, Department of Applied Mathematics, University of Waterloo
K. Morris, University of Waterloo
(109093120) 
9:30 a.m.
Mathematical modeling and analysis of the Forchheimer flows in porous media and application.
Akif Ibragimov*, Texas Tech University
Eugenio Aulisa, Texas Tech University
Lidia Bloshanskaya, Texas Tech University
(10907684) 
10:00 a.m.
Linear stability of subsonic waves for the onedimensional BenneyLuke equation.
Milena Stanislavova*, University of Kansas
(10903592) 
10:30 a.m.
Asymptotic Stabilization for Feedforward Systems with Delayed Feedbacks.
Michael Malisoff*, LSU Department of Mathematics
(10909343)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Discrete Methods and Models in Mathematical Biology, I
Room 298, Carver
Organizers:
Dora Matache, University of NebraskaOmaha
Stephen J. Willson, Iowa State University swillson@iastate.edu

8:30 a.m.
Obtaining simpler phylogenetic networks from more general networks.
Stephen J. Willson*, Iowa State University
(10909254) 
9:00 a.m.
Statistics in Tree Space.
Megan Owen*, University of Waterloo
(109092294) 
9:30 a.m.
Characterizing Compatibility and Agreement of Phylogenetic Trees.
David F FernándezBaca*, Department of Computer Science, Iowa State University
Sudheer R Vakati, Department of Computer Science, Iowa State University
(10909278) 
10:00 a.m.
DNA knot distance graphs.
Isabel K Darcy*, University of Iowa
Annette Honken, University of Iowa
Hyeyoung Moon, Kettering University
Robert G Scharein, Hypnagogic Software
Guanyu Wang, University of Iowa
Danielle Washburn, University of Iowa
(109092306) 
10:30 a.m.
Distance Geometry Optimization and Applications.
Zhijun Wu*, Iowa State University
(109092195)

8:30 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Extremal Combinatorics, I
Room 268, Carver
Organizers:
Steve Butler, Iowa State University
Ryan Martin, Iowa State University rymartin@iastate.edu

8:00 a.m.
Extremal hypergraphs for packing and covering.
Penny Haxell*, University of Waterloo
(109005217) 
9:00 a.m.
Wellseparable graphs with large bandwidth.
Bela Csaba*, Bolyai Institute, University of Szeged
(109005338) 
9:30 a.m.
On the Ramsey number of the triangle and the cube.
Gonzalo Fiz Pontiveros, IMPA, Rio de Janeiro, Brasil
Simon Griffiths, IMPA, Rio de Janeiro, Brasil
Rob Morris, IMPA, Rio de Janeiro, Brasil
David Saxton, IMPA, Rio de Janeiro, Brasil
Jozef Skokan*, London School of Economics and University of Illinois, UrbanaChampaign
(109005176) 
10:00 a.m.
Planar and sparse $4$critical graphs with four triangles.
O. V. Borodin, Sobolev Institute of Mathematics, Novosibirsk, Russia
A. Kostochka*, University of Illinois at UrbanaChampaign
B. Lidicky, University of Illinois at UrbanaChampaign
M. Yancey, University of Illinois at UrbanaChampaign
(10900564) 
10:30 a.m.
On the approximate shape of graphic sequences that are not potentially $H$graphic.
Catherine Erbes, Department of Mathematical and Statistical Sciences, University of Colorado Denver
Michael Ferrara*, Department of Mathematical and Statistical Sciences, University of Colorado Denver
Ryan Martin, Department of Mathematics, Iowa State University
Paul Wenger, School of Mathematical Sciences, Rochester Institute of Technology
(109005285)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Generalizations of Nonnegative Matrices and Their Sign Patterns, I
Room 232, Carver
Organizers:
Minerva Catral, Xavier University catralm@xavier.edu
Shaun Fallat, University of Regina
Pauline van den Driessche, University of Victoria

8:00 a.m.
Eventual Positivity in Multivariate Data Analysis.
InJae Kim*, Minnesota State University
(109015113) 
8:30 a.m.
Matrix roots of nonnegative and eventually nonnegative matrices.
Judith J McDonald, Washington State University
Pietro Paparella*, Washington State University
Michael J Tsatsomeros, Washington State University
(10901552) 
9:00 a.m.
Sign patterns that require eventual exponential nonnegativity.
Craig Erickson*, Department of Mathematics, Iowa State University
(109015110) 
9:30 a.m.
The Essence of Nonnegativity for Matrices.
Judi J McDonald*, Washington State University
(10901517) 
10:00 a.m.
Refined Inertia of Sign Pattern Matrices and Applications to Dynamical Systems.
Pauline van den Driessche*, Dept Math & Stats, University of Victoria, Victoria, BC, Canada
(109015134)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Geometric Elliptic and Parabolic Partial Differential Equations, I
Room 128, Carver
Organizers:
Brett Kotschwar, Arizona State University kotschwar@asu.edu
Xuan Hien Nguyen, Iowa State University

8:00 a.m.
Complete Ricciflat Kahler metrics on resolutions of singularities.
Bianca Santoro*, City College, CUNY
(109053366) 
9:00 a.m.
Holomorphic functions on certain Kahler manifolds.
Ovidiu Munteanu*, University of Connecticut
(10905868) 
10:00 a.m.
Branch points of minimizing projective planes.
Robert Gulliver*, University of Minnesota
(109053165)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Graphs, Hypergraphs and Counting, I
Room 274, Carver
Organizers:
Eva Czabarka, University of South Carolina czabarka@math.sc.edu
Laszlo Szekely, University of South Carolina

9:00 a.m.
Counting SubHypergraphs and the Characteristic Polynomial.
Joshua N. Cooper, University of South Carolina
Aaron M. Dutle*, University of South Carolina
(109005170) 
9:30 a.m.
Winding up and down in meanders.
V. Coll, Lehigh University
C. Magnant, Georgia Southern University
H. Wang*, Georgia Southern University
(10900545) 
10:00 a.m.
Generating infinite random graphs.
Csaba Biró*, University of Louisville
Udayan B Darji, University of Louisville
(109005161) 
10:30 a.m.
An adjacent transposition Gray code for essentially different shelling orders of the boundary of a hypercube.
Gabor Hetyei*, University of North Carolina at Charlotte
Sarah Birdsong, University of North Carolina at Charlotte
(10900540)

9:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Kinetic and Hydrodynamic PDEbased Descriptions of Multiscale Phenomena, I
Room 160, Carver
Organizers:
James Evans, Iowa State University
Hailiang Liu, Iowa State University
Eitan Tadmor, University of Maryland tadmor@cscamm.umd.edu

8:00 a.m.
Dynamic scaling for kinetic clustering models that govern critical branching processes.
G Iyer, Carnegie Mellon University
N Leger, Carnegie Mellon University
R L Pego*, Carnegie Mellon University
(109070273) 
9:00 a.m.
Kinetic theory of gassolid flow based on microscale simulation: a route towards describing multiscale phenomena.
Shankar Subramaniam*, Department of Mechanical Engineering, Iowa State University
(109076252) 
10:00 a.m.
From stochastic molecularlevel reactiondiffusion models to conventional and generalized hydrodynamic reactiondiffusion equations.
Jim W. Evans*, Iowa State University
DaJiang Liu, Ames Laboratory  USDOE
(109082222)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Logic and Algebraic Logic, I
Room 282, Carver
Organizers:
Jeremy Alm, Illinois College
Andrew Ylvisaker, Iowa State University andrewy@iastate.edu

8:00 a.m.
The superfluity of equality.
Andrew John Ylvisaker*, Iowa State University
(109003393) 
9:00 a.m.
Degree Spectra of Theories.
Uri Andrews, University of WisconsinMadison
Mingzhong Cai, University of WisconsinMadison
David Diamondstone*, University of WisconsinMadison
Steffen Lempp, University of WisconsinMadison
Joseph Miller, University of WisconsinMadison
(109003336) 
9:30 a.m.
The Thin Set Theorem for Pairs implies DNR.
Brian Rice*, University of Wisconsin  Madison
(109003300) 
10:00 a.m.
Degrees of Provability.
Uri Andrews, University of Wisconsin, Madison
Mingzhong Cai*, University of Wisconsin, Madison
David Diamondstone, University of Wisconsin, Madison
Steffen Lempp, University of Wisconsin, Madison
Joseph S. Miller, University of Wisconsin, Madison
(109003271) 
10:30 a.m.
Some new weak representations of certain finite relation algebras.
Richard L Kramer*, Iowa State University
(109003423)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on MultiDimensional Dynamical Systems, I
Room 190, Carver
Organizers:
Jayadev Athreya, University of Illinois, UrbanaChampaign jathreya@illinois.edu
Jonathan Chaika, University of Chicago
Joseph Rosenblatt, University of Illinois at UrbanaChampaign

9:00 a.m.
Discussion 
9:30 a.m.
Discussion 
10:00 a.m.
Directional mixing properties of $\mathbb Z^2$ actions.
E. Arthur Robinson, Jr., George Washington University
Joseph Rosenblatt, University of Illinois at UrbanaChampaign
Ayse A Sahin*, DePaul University
(109037367) 
10:30 a.m.
Ledrappier's example and some open problems in algebraic $\mathbb{Z}^d$ dynamics.
Bruce Kitchens*, Indiana University Purdue University  Indianapolis
(109037207)

9:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Numerical Analysis and Scientific Computing, I
Room 150, Carver
Organizers:
Hailiang Liu, Iowa State University hliu@iastate.edu
Songting Luo, Iowa State University
James Rossmanith, Iowa State University
Jue Yan, Iowa State University

8:00 a.m.
How a nonconvergent recovered Hessian works in mesh adaptation.
Weizhang Huang*, The University of Kansas
Lennard Kamenski, Technical University of Darmstadt
(109065205) 
8:30 a.m.
MeanField Description of Ionic Size Effects with NonUniform Ionic Sizes: A Numerical Approach.
S. Zhou, UCSD
Z. Wang*, Florida International University
B. Li, UCSD
(109065251) 
9:00 a.m.
Finite Element Method for Poroelasticity Models of Soft Matters and Soil Mechanics.
Xiaobing H. Feng*, The University of Tennessee
(109065202) 
9:30 a.m.
Dissection of Boussinesq nonlinear interactions using intermediate models.
Gerardo HernandezDuenas*, University of Wisconsin
Leslie M Smith, University of Wisconsin
Samuel N Stechmann, University of Wisconsin
(109076363) 
10:00 a.m.
The entropy satisfying discontinuous Galerkin methods for FokkerPlanck equations.
Hailiang Liu, Iowa State University
Hui Yu*, Iowa State University
(109035327) 
10:30 a.m.
Inverse Surface Scattering in NearField Imaging.
Gang Bao, Zhejiang University and Michigan State University
Peijun Li*, Purdue University
(109078250)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Numerical Methods for Geometric Partial Differential Equations, I
Room 124, Carver
Organizers:
Gerard Awanou, University of Illinois at Chicago awanou@math.uic.edu
Nicolae Tarfulea, Purdue University

8:00 a.m.
Nonstandard Discontinuous Galerkin Methods for Fully Nonlinear Second Order PDEs.
Xiaobing H. Feng*, The University of Tennessee
(109065203) 
8:30 a.m.
Geometric optimization of DirichletLaplacian eigenvalues.
Braxton Osting, UCLA
ChiuYen Kao*, Claremont McKenna College
(109065282) 
9:00 a.m.
Pseudo transient continuation and time marching methods for MongeAmpère type equation.
Gerard Awanou*, University of Illinois at Chicago
(109065135) 
9:30 a.m.
Finite element methods for the fully nonlinear MongeAmpère equation.
Michael J. Neilan*, University of Pittsburgh
(109065159) 
10:00 a.m.
A Finite Elements Method for Total Variation Minimization.
Leopold Matamba Messi*, The Ohio State University
Mingjun Lai, The University of Georgia
(109065296) 
10:30 a.m.
Alternating Evolution Discontinuous Galerkin methods for HamiltonJacobi Equations.
Michael Pollack*, Iowa State University
(109065313)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Operator Algebras and Topological Dynamics, I
Room 4, Carver
Organizers:
Benton L. Duncan, North Dakota State University benton.duncan@ndsu.edu
Justin R. Peters, Iowa State University

8:00 a.m.
Covers in Inverse Semigroups and Tight C$^*$algebras.
Allan P Donsig*, University of NebraskaLincoln
David Milan, University of TexasTyler
(109046174) 
8:30 a.m.
C*dynamical systems and Operator Algebras.
Evgenios Kakariadis*, University of Waterloo
(109047201) 
9:30 a.m.
Piecewise conjugacy as an isomorphism invariant for operator algebras.
Elias G Katsoulis*, East Carolina University & University of Athens
(109047144) 
10:30 a.m.
On Individual Ergodic Theorems in Noncommutative $L^p$spaces for $p1$.
Semyon N. Litvinov*, Pennsylvania State University Hazleton
(10904727)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Partial Differential Equations, I
Room 204, Carver
Organizers:
Gary Lieberman, Iowa State University
Paul Sacks, Iowa State University psacks@iastate.edu
Mahamadi Warma, University of Puerto Rico at Rio Piedras

8:00 a.m.
About the existence and stability of solutions close to equilibria for gas balls under the influence of gravity.
Gerhard O Strohmer*, Deaprtment of Mathematics, University of Iowa
(109035140) 
8:30 a.m.
Mixed boundary value problems for quasilinear elliptic equations.
Chunquan Tang*, Iowa State University
Gary M. Lieberman, Iowa State University
(109035287) 
9:00 a.m.
Carleman estimates and stabilization of hyperbolic systems in absence of geometric observability conditions.
Matthias Eller, Georgetown University
Daniel Toundykov*, University of NebraskaLincoln
(109035278) 
9:30 a.m.
The Dirichlet boundary value problems for second order parabolic operators satisfying a Carleson condition.
Sukjung Hwang*, The University of Edinburgh
Martin Dindos, The University of Edinburgh
(109035270) 
10:00 a.m.
The Obstacle Problem for Divergence Form Elliptic Operators.
Ivan Blank*, Kansas State University
Zheng Hao, Kansas State University
(10903571) 
10:30 a.m.
Semilinear elliptic and ellipticparabolic equations with Wentzell boundary conditions and $L^1$data.
Paul Sacks, Department of Mathematics/Iowa State University
Mahamadi Warma*, Department of Mathematics/University of Puerto Rico, Rio Piedras Campus
(10903550)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Probabilistic and Multiscale Modeling Approaches in Cell and Systems Biology, I
Room 202, Carver
Organizers:
Jasmine Foo, University of Minnesota
Anastasios Matzavinos, Iowa State University tasos@iastate.edu

8:00 a.m.
Switching in biological networks.
Badal Joshi*, University of Minnesota
(109092351) 
9:00 a.m.
Pathogen evolution in switching environments: a hybrid dynamical system approach.
József Z. Farkas, University of Stirling
Peter Hinow*, University of Wisconsin  Milwaukee
Jan Engelstädter, University of Queensland
(109060154) 
10:00 a.m.
Identifiability & Parameter Estimation for Modeling Human Disease.
Marisa C Eisenberg*, Departments of Epidemiology and Mathematics, University of Michigan, Ann Arbor
(109093419)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Quasigroups, Loops, and Nonassociative Division Algebras, I
Room 68, Carver
Organizers:
C. E. Ealy, Jr., Western Michigan University clifton.e.ealy@wmich.edu
Benjamin Phillips, University of Michigan Dearborn
J. D. Phillips, Northern Michigan University
Petr Vojtechovsky, University of Denver

9:00 a.m.
KLoops from G, G a subgroup of GL(H) for H a separable Hilbert space.
Alper Bulut*, Department of Mathematics, Western Michigan University
(109020197) 
9:30 a.m.
A case for new associators.
David Stanovský, Charles University in Prague
Petr Vojtěchovský*, University of Denver
(109020243) 
10:00 a.m.
Zorn vector matrices over $\mathbb{Z}/p^k\mathbb{Z}$.
Andrew T Wells*, East Central University
(109017298) 
10:30 a.m.
Beyond complex number exponentiation: Two prototype algebras.
Jens Köplinger*, Greensboro NC 27403
(109017116)

9:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Ring Theory and Noncommutative Algebra, I
Room 98, Carver
Organizers:
Victor Camillo, University of Iowa
Miodrag C. Iovanov, University of Bucharest and University of Iowa yovanov@gmail.com

8:00 a.m.
When Algebras have bases consisting entirely of units.
Sergio R LópezPermouth*, Ohio University
(109016211) 
8:30 a.m.
$\tau$Projective Modules.
Mohamed F Yousif*, The Ohio State University at Lima
Ismail Amin, Cairo University, Giza, Egypt
Yasser F Ibrahim, Cairo University, Giza, Egypt
(10901661) 
9:00 a.m.
On a generalization of primitive rings.
Gangyong Lee*, The Ohio State University
Cosmin S. Roman, The Ohio State University at Lima
Xiaoxiang Zhang, Southeast University
(109016260) 
9:30 a.m.
On Baer Module Hulls.
Jae Keol Park, Pusan National University
Syed Tariq Rizvi*, The Ohio State University
(109016191) 
10:00 a.m.
Associated primes of induced modules over semigroupgraded rings.
Allen D. Bell*, University of WisconsinMilwaukee
(109016326) 
10:30 a.m.
Almost SelfInjective Rings.
Adel N Alahmadi, Abdulaziz University, Jeddah, Saudi Arabia
S K Jain*, Abdulaziz University, Jeddah, Saudi Arabia and Ohio University, Athens, OH
Surjeet Singh, Chandigarh, Indfia
(109016115)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Stochastic Processes with Applications to Physics and Control, I
Room 196, Carver
Organizers:
Jim Evans, Iowa State University evans@ameslab.gov
Arka Ghosh, Iowa State University
Jon Peterson, Purdue University
Alexander Roitershtein, Iowa State University

8:00 a.m.
Busemann functions and variational formulas for last passage percolation and polymer models.
Nicos Georgiou*, University of Utah
Firas RassoulAgha, University of Utah
Timo Seppalainen, University of WisconsinMadison
Atilla Yilmaz, Bogazici University
(109060136) 
8:30 a.m.
Isoperimetry in Supercritical Percolation.
Oren Louidor*, UCLA
Marek Biskup, UCLA
Eviatar Procaccia, Weizmann Institute Israel
Ron Rosenthal, Herbew University of Jerusalem
(10906012) 
9:00 a.m.
Geodesics in firstpassage percolation.
Antonio Auffinger*, University of Chicago
(10906075) 
9:30 a.m.
Diffusion with Redistribution.
Iddo BenAri*, University of Connecticut
(109060175) 
10:00 a.m.
Large deviations for random walks in a random environment on a strip.
Jonathon Peterson*, Purdue University
(10906073) 
10:30 a.m.
Generalized hydrodynamic treatment of the interplay between singlefile diffusion and conversion reaction in nanopores.
Jing Wang*, Ames Laboratory  USDOE, and Departments of Mathematics, Iowa State University, Ames,50011
David Michael Ackerman, Ames Laboratory  USDOE, and Departments of Chemistry, Iowa State University, Ames, 50011
James W Evans, Ames Laboratory  USDOE, and Departments of Mathematics, and Physics & Astronomy, Iowa State University, Ames, 50011
(109060234)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.10:50 a.m.
Special Session on Topology of 3Manifolds, I
Room 294, Carver
Organizers:
Marion Campisi, University of Texas at Austin
Alexander Zupan, University of Texas at Austin zupan@math.utexas.edu

8:00 a.m.
The Kakimizu complex of a knot.
Piotr Przytycki, Polish Academy of Sciences
Jennifer Schultens*, UC Davis
(10905772) 
8:30 a.m.
Seifert surfaces for split links and links in $\mathbb{R}^3$.
Jessica E. Banks*, CRMISM, Montreal
(109057262) 
9:00 a.m.
Klein bottles and tori properly embedded in a knot exterior.
Mario EudaveMuñoz*, Instituto de Matematicas, UNAM
Enrique RamirezLosada, CIMAT
(109057348) 
9:30 a.m.
Computing closed essential surfaces in knot complements.
Benjamin A Burton, University of Queensland
Alexander Coward*, University of Sydney/UC Berkeley
Stephan Tillmann, University of Sydney
(109057438) 
10:00 a.m.
Normalizing Topologically Minimal surfaces.
David C Bachman*, Pitzer College
(10905774) 
10:30 a.m.
Essential Surfaces in Highly Twisted Knot Exteriors.
Ryan Blair*, University of Pennsylvania
Maggy Tomova, University of Iowa
Dave Futer, Temple University
(109057305)

8:00 a.m.

Saturday April 27, 2013, 8:00 a.m.9:50 a.m.
Special Session on Zero Forcing, Maximum Nullity/Minimum Rank, and Colin de Verdiere Graph Parameters, I
Room 205, Carver
Organizers:
Leslie Hogben, Iowa State University and American Institute of Mathematics hogben@aimath.org
Bryan Shader, University of Wyoming

8:00 a.m.
Connections between the minimum rank and inverse eigenvalue problems.
Wayne W Barrett*, Department of Mathematics, Brigham Young University
Curtis G Nelson, Department of Mathematics, University of Wyoming
John Sinkovic, Department of Mathematics, Brigham Young University
Tianyi Yang, Department of Mathematics, Brigham Young University
(109015242) 
8:30 a.m.
Decomposing a minimum rank matrix.
John Sinkovic*, Brigham Young University
Wayne Barrett, Brigham Young University
Mark Kempton, University of California, San Diego
Nicole Malloy, Brigham Young University
Curtis Nelson, University of Wyoming
William Sexton, Brigham Young University
(109015269) 
9:00 a.m.
Construction of real symmetric matrices with prescribed second order interlacing sets of eigenvalues and graph.
Keivan Hassani Monfared*, University of Wyoming
Bryan L Shader, University of Wyoming
(109015166) 
9:30 a.m.
Bounds on maximum nullity.
Jason Grout*, Drake University
Steve Butler, Iowa State University
Tracy Hall, Novatek
(109015240)

8:00 a.m.

Saturday April 27, 2013, 11:10 a.m.12:00 p.m.
Erdős Memorial Lecture
On subset sums.
Room 2055, Hoover Hall
Endre Szemerédi*, Siemens Corporate Technology 
Saturday April 27, 2013, 1:45 p.m.2:35 p.m.
Invited Address
Consensus and flocking in selforganized dynamics.
Room 1, Carver
Eitan Tadmor*, University of Maryland
Sebastien Motsch, University of Maryland
Changhui Tan, University of Maryland
(10907004) 
Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Algebraic and Geometric Combinatorics, II
Room 74, Carver
Organizers:
Sung Y. Song, Iowa State University sysong@iastate.edu
Paul Terwilliger, University of WisconsinMadison

2:45 p.m.
Trianglefree Strongly Regular Graphs: From Dale Mesner to a Modern Understanding.
M. Klin, BenGurion University of the Negev, Israel
A Woldar*, Villanova University
M ZivAv, BenGurion University of the Negev, Israel
(109005329) 
3:15 p.m.
Coxeter Table Algebras.
Andrew P. Wang*, Northern Illinois University
(109020312) 
3:45 p.m.
$1\frac12$designs and $1\frac12$difference sets.
Oktay Olmez*, Iowa State University
(109005231) 
4:15 p.m.
Groups of projective planes with differing numbers of point and line orbits.
G. Eric Moorhouse, University of Wyoming
Tim Penttila*, Colorado State University
(10905151) 
4:45 p.m.
Connections between $U_q(\mathfrak{sl}_2)$ and tridiagonal pairs.
Sarah R. BocktingConrad*, University of Wisconsin  Madison
(109005411) 
5:15 p.m.
Geometry of numbers and sumsets.
Jaewoo Lee*, The City University of New York  Borough of Manhattan Community College
(10900531)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:05 p.m.
Special Session on Analysis, Dynamics and Geometry In and Around Teichmuller Spaces, II
Room 118, Carver
Organizers:
Alistair Fletcher, Northern Illinois University
Vladimir Markovic, California Institute of Technology
Dragomir Saric, Queens College CUNY dragomir.saric@qc.cuny.edu

2:45 p.m.
Deformations of hyperbolic structures via shears.
Dragomir Saric*, CUNY/The Graduate Center and Queens College
(10905898) 
3:15 p.m.
(w1,w2)tempered ultra distributions representation theorems.
Hamed Mohd Obiedat*, The Hashemite University
(109046235) 
3:45 p.m.
A free boundary problem in potential theory.
Erik Lundberg*, Purdue University
Dmitry Khavinson, University of South Florida
Razvan Teodorescu, University of South Florida
(109031258) 
4:15 p.m.
Generalization of Conformally Natural Extension.
Oleg Muzician*, CUNYBMCC
Jun Hu, CUNY Graduate Center, CUNY Brooklyn College
(109030119) 
4:45 p.m.
Linear slices close to a Maskit slice.
Kentaro Ito*, Nagoya University
(109057193)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Commutative Algebra and its Environs, II
Room 8, Carver
Organizers:
Olgur Celikbas, University of Missouri, Columbia
Greg Piepmeyer, University of Missouri, Columbia ggpz95@mail.missouri.edu

2:45 p.m.
On support varieties over complete intersections.
David A. Jorgensen*, University of Texas at Arlington
(109013389) 
3:45 p.m.
Chern character for matrix factorization via ChernWeil.
Xuan Yu*, University of NebraskaLincoln
(109016209) 
4:15 p.m.
Regularity of general rational curves on hypersurfaces.
Sara Gharahbeigi*, University of Missouri, Columbia
(109014383) 
4:45 p.m.
Semidualizing Modules Over Rings of invariants.
William Thomas Sanders*, University of Kansas
(109013427) 
5:15 p.m.
Cohomology of Monomial Algebras.
Andrew Conner, Wake Forest University
Ellen Kirkman, Wake Forest University
James Kuzmanovich, Wake Forest University
W. Frank Moore*, Wake Forest University
(109016364)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Commutative Ring Theory, II
Room 18, Carver
Organizers:
Michael Axtell, University of St. Thomas
Joe Stickles, Millikin University jstickles@millikin.edu

2:45 p.m.
Zero divisors, torsion elements, and unions of chains of annihilators.
Dan Anderson*, The University of Iowa
Sangmin Chun, Seoul National University
(109013118) 
3:15 p.m.
The cases for and against loops in the zerodivisor graphs of commutative rings.
Shane P Redmond*, Eastern Kentucky University
(109013259) 
3:45 p.m.
Counting walks on zerodivisor graphs of finite reduced rings.
John D. LaGrange*, Lindsey Wilson College
(10901324) 
4:15 p.m.
Realizing zerodivisor graphs of posets.
John D. LaGrange, Lindsey Wilson College
Kyle A. Roy*, Miami University
(10900630) 
4:45 p.m.
A Partial Characterization of Noetherian Integral Domains Which Admit Only Finitely Many Star (Prime) Operations.
Evan Houston*, Univ. of North Carolina at Charlotte
Mi Hee Park, ChungAng University
(109013210) 
5:15 p.m.
Transfer results for the FIP and FCP properties of ring extensions.
David E. Dobbs*, University of Tennessee
Gabriel Picavet, Universite Blaise Pascal
Martine PicavetL'Hermitte, Universite Blaise Pascal
(109013261)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Computability and Complexity in Discrete and Continuous Worlds, II
Room 290, Carver
Organizers:
Jack Lutz, Iowa State University
Tim McNicholl, Iowa State University mcnichol@iastate.edu

2:45 p.m.
Notions of computability theoretic reduction between $\Pi^1_2$ principles.
Denis R. Hirschfeldt*, University of Chicago
Carl G. Jockusch, Jr., University of Illinois at UrbanaChampaign
(109003225) 
3:15 p.m.
Strengthening the Link between Complexity Classes and Kolmogorov Complexity.
Eric Allender*, Rutgers University
(109068370) 
3:45 p.m.
Complexity of orders on residually nilpotent groups.
Valentina Harizanov*, The George Washington University
(109003275) 
4:15 p.m.
Uniformly Computable Reductions Between Mathematical Theorems.
François G. Dorais, Dartmouth College
Damir D. Dzhafarov, University of California, Berkeley
Jeffry L. Hirst, Appalachian State University
Joseph R. Mileti*, Grinnell College
Paul Shafer, LIAFA Université Paris Diderot  Paris 7, Case 7014
(109003347) 
4:45 p.m.
What does randomness mean for betting strategies?
Sam Buss, UC San Diego
Mia Minnes*, UC San Diego
(10900328) 
5:15 p.m.
Schnorr randomness and the Lebesgue Differentiation Theorem.
Noopur J Pathak*, The Pennsylvania State University
Cristobal Rojas, Universidad Andres Bello
Stephen Simpson, The Pennsylvania State University
(109003108)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Computational Advances on Special Functions and Tropical Geometry, II
Room 2, Carver
Organizers:
Lubjana Beshaj, Oakland University
Emma Previato, Boston University ep@bu.edu

2:45 p.m.
Decomposition of superelliptic Jacobians.
Tony Shaska*, Oakland University
(109014416) 
3:15 p.m.
Computing branching data and decomposing Jacobian varieties.
Jennifer Paulhus*, Grinnell College
(109014373) 
4:15 p.m.
The BatalinVilkovisky Formalism and Cohomology of Moduli Spaces.
Domenico D'Alessandro, Iowa State University
Alexander A Voronov*, University of Minnesota
(109014352) 
4:45 p.m.
Extension theorems for vector bundles.
Ravindra Girivaru*, University of Missouri  St. Louis
Amit Tripathi, Indian Statistical Institute Bangalore
(109014402) 
5:15 p.m.
Reciprocity Laws on Algebraic Surfaces via Iterated Integrals.
Ivan Horozov*, Washington Univetsity in St. Louis
(109014127)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Control Theory and Qualitative Analysis of Partial Differential Equations, II
Room 132, Carver
Organizers:
George Avalos, University of NebraskaLincoln gavalos@math.unl.edu
Scott Hansen, Iowa State University

2:45 p.m.
Almost everywhere uniform stability of an autonomous ODE.
Rajeev Rajaram*, Kent State University
Umesh Vaidya, Iowa State University
(10909313) 
3:15 p.m.
HamiltonianKrein instability index and applications.
Atanas Stefanov*, University of Kansas
Todd Kapitula, Calvin College
(10903781) 
3:45 p.m.
The Evans function and the WeylTitchmarsh function.
Yuri Latushkin, University of MissouriColumbia
Alim Sukhtayev*, Texas A&M University
(109035241) 
4:15 p.m.
BlowUp of Positive Solutions to Wave Equations in High Space Dimensions.
Mohammad Rammaha*, University of Nebraska Lincoln
Hiroyuki Takamura, Future University Hakodate
Hiroshi Uesaka, Nihon University
Kyouhei Wakasa, Future University Hakodate
(109035236) 
4:45 p.m.
Mathematical Challenges Arising from the Questions of Controllability and Stabilization for Linked Elastic Structures.
Mary Ann Horn*, National Science Foundation & Vanderbilt University
(109093428) 
5:15 p.m.
A general approach to the boundary controllability of hyperbolic systems.
Matthias Eller*, Department of Mathematics, Georgetown University
(109035289)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:05 p.m.
Special Session on Discrete Methods and Models in Mathematical Biology, II
Room 298, Carver
Organizers:
Dora Matache, University of NebraskaOmaha
Stephen J. Willson, Iowa State University swillson@iastate.edu

2:45 p.m.
Phase Transition of Heterogeneous Boolean Networks with Applications to Signal Transduction.
Amanda Ludes, University of Nebraska at Omaha
Celeste Mott, University of Nebraska at Omaha
Dora Matache*, University of Nebraska at Omaha
(10903759) 
3:15 p.m.
Sensitivity Analysis of Biological Boolean Networks Using Nonadditive Set Function Information Fusion.
Naomi Kochi*, Department of Genetics, Cell Biology, and Anatomy, University of Nebraska Medical Center
Dora Matache, Department of Mathematics, University of Nebraska at Omaha
(109028145) 
3:45 p.m.
Data characterization and identification for network inference.
Elena S Dimitrova*, Clemson University
(10901423) 
4:15 p.m.
On the canalyzing depth of a Boolean function.
Elena S Dimitrova, Clemson University
Qijun He, Clemson University
Matthew Macauley*, Clemson University
(109092378) 
4:45 p.m.
The Power of Two: The Impact of Combining Methods in Reverse Engineering Gene Networks.
Brandilyn Stigler*, Southern Methodist University
(109092417)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Extremal Combinatorics, II
Room 268, Carver
Organizers:
Steve Butler, Iowa State University
Ryan Martin, Iowa State University rymartin@iastate.edu

3:45 p.m.
Compatible circuits in 3regular eulerian digraphs.
James Carraher, University of NebraskaLincoln
Stephen G. Hartke*, University of NebraskaLincoln
(109005397) 
4:15 p.m.
Elliptic and parabolic gradient estimates on graphs.
Frank Bauer, Harvard University
Paul Horn*, Harvard University
Gabor Lippner, Harvard University
Yong Lin, Renmin University
(109005350) 
4:45 p.m.
Computing with voting trees.
Jennifer Iglesias, Carnegie Mellon University
Nathaniel Ince, Carnegie Mellon University
PoShen Loh*, Carnegie Mellon University
(109005190) 
5:15 p.m.
Graphs of given maximum degree with the most cliques.
Jonathan Cutler, Montclair State University
A J Radcliffe*, University of NebraskaLincoln
(109005187)

3:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:05 p.m.
Special Session on Generalizations of Nonnegative Matrices and Their Sign Patterns, II
Room 232, Carver
Organizers:
Minerva Catral, Xavier University catralm@xavier.edu
Shaun Fallat, University of Regina
Pauline van den Driessche, University of Victoria

2:45 p.m.
Techniques for Verifying Inertially Arbitrary Patterns.
Kevin N. Vander Meulen*, Redeemer University College
(109015112) 
3:15 p.m.
Computations with some classes of matrices related to Pmatrices.
Juan M. Pena*, Universidad de Zaragoza
(10901597) 
3:45 p.m.
Variationdiminishing properties and bidiagonal decompositions of eigenvector matrices of totally positive matrices.
Plamen S Koev*, San Jose State University
(10901583) 
4:15 p.m.
Inequalities on Totally Nonnegative Matrices.
Shahla Nasserasr*, University of Regina
(109015106) 
4:45 p.m.
Eventual total positivity and related properties.
Olga Y. Kushel*, TU Berlin
(109047107)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Geometric Elliptic and Parabolic Partial Differential Equations, II
Room 128, Carver
Organizers:
Brett Kotschwar, Arizona State University kotschwar@asu.edu
Xuan Hien Nguyen, Iowa State University

2:45 p.m.
Maximal symmetry in solvmanifolds.
Michael Jablonski*, University of Oklahoma
(109053379) 
3:45 p.m.
A Discrete Yamabe Problem.
Andrea N Young*, Ripon College
(109052297) 
4:45 p.m.
The Curvature Estimate Of Higher Codimensional Mean Curvature Flow.
MaoPei Tsui*, Department of Mathematics and Statistics, University of Toledo
(109053148)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Graphs, Hypergraphs and Counting, II
Room 274, Carver
Organizers:
Eva Czabarka, University of South Carolina czabarka@math.sc.edu
Laszlo Szekely, University of South Carolina

2:45 p.m.
The Bethe approximation, correlation inequalities and lower bounds on the permanent: how Friedland's monomerdimer conjecture(LAMC) was proved and LuMohrSzekely was disproved.
Leonid Gurvits*, The City College of New York
(109005104) 
3:45 p.m.
Minimum vertex degree threshold for loose Hamilton cycles in 3graphs.
Jie Han, Georgia State University
Yi Zhao*, Georgia State University
(109005129) 
4:15 p.m.
Coloring clawfree graphs with $\Delta1$ colors.
Daniel W. Cranston*, Virginia Commonwealth University
Landon Rabern, Arizona State University
(10900544) 
4:45 p.m.
Counting colorings of a regular graph.
David Galvin*, Department of Mathematics, University of Notre Dame
(10900563) 
5:15 p.m.
The list version of BorodinKostochka Conjecture for graphs with large maximum degree.
Ilkyoo Choi*, University of Illinois at UrbanaChampaign
Henry A Kierstead, Arizona State University
Landon Rabern, Arizona State University
Bruce Reed, McGill University
(10900582)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Kinetic and Hydrodynamic PDEbased Descriptions of Multiscale Phenomena, II
Room 160, Carver
Organizers:
James Evans, Iowa State University
Hailiang Liu, Iowa State University
Eitan Tadmor, University of Maryland tadmor@cscamm.umd.edu

2:45 p.m.
Hydrodynamic Limit of the Granular Gases Equation.
Thomas Rey*, CSCAMM, University of Maryland
(109076177) 
3:15 p.m.
Hydrodynamic limit of granular gases to pressureless Euler in dimension 1.
PierreEmmanuel Jabin*, University of Maryland
(109035184) 
4:15 p.m.
FokkerPlanck equation with absorbing boundary condition.
Hyung Ju Hwang, Pohang University of Science and Technology
Juhi Jang*, University of California, Riverside
Juan J. L. Velazquez, University of Bonn
(109035365) 
4:45 p.m.
Global Dynamics of Chemotaxis Models.
Tong Li*, Depatment of Mathematics, University of Iowa, Iowa City, IA 52242
(109035372)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:05 p.m.
Special Session on Logic and Algebraic Logic, II
Room 282, Carver
Organizers:
Jeremy Alm, Illinois College
Andrew Ylvisaker, Iowa State University andrewy@iastate.edu

2:45 p.m.
Consistent theories with no finite models.
Roger D Maddux*, Iowa State University
(109003132) 
3:15 p.m.
Computability Theory and Learning Theory.
Achilles Athanasios Beros*, University of Wisconsin  Madison
(109003249) 
3:45 p.m.
The $\Sigma_1^1$completeness of the Decomposability of TorsionFree Abelian Groups.
Kyle Riggs*, Indiana University
(109003183) 
4:15 p.m.
Recursively presenting models of Solovay theories.
Uri Andrews*, University of WisconsinMadison
Mingzhong Cai, University of WisconsinMadison
David Diamondstone, University of WisconsinMadison
Joseph S Miller, University of WisconsinMadison
Steffen Lempp, University of WisconsinMadison
(109003173) 
4:45 p.m.
Boolean Semilattices.
Clifford Bergman*, Iowa State University
(10900646)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:05 p.m.
Special Session on MultiDimensional Dynamical Systems, II
Room 190, Carver
Organizers:
Jayadev Athreya, University of Illinois, UrbanaChampaign jathreya@illinois.edu
Jonathan Chaika, University of Chicago
Joseph Rosenblatt, University of Illinois at UrbanaChampaign

2:45 p.m.
Some Results on Affine Manifolds in Genus 3 with a Zero Lyapunov Exponent.
David Aulicino*, University of Chicago
(109037344) 
3:15 p.m.
Discussion 
3:45 p.m.
SL(2,R) orbit closures of translation surfaces.
Alex Wright*, University of Chicago
(109037277) 
4:15 p.m.
PattersonSullivan Theory and Orbit Counting for Subgroups of Mapping Class Groups.
Ilya Gekhtman*, University of Chicago
(109037368) 
4:45 p.m.
Exponential decay of multiple mixing integrals of {\em SL} $(n)$ actions.
Ioannis Konstantoulas*, University of Illinois at UrbanaChampaign
(109037355)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Numerical Analysis and Scientific Computing, II
Room 150, Carver
Organizers:
Hailiang Liu, Iowa State University hliu@iastate.edu
Songting Luo, Iowa State University
James Rossmanith, Iowa State University
Jue Yan, Iowa State University

2:45 p.m.
A Splitting Method for Differential Approximations of the Radiative Transport Equation.
Weimin Han*, University of Iowa
(109065139) 
3:15 p.m.
Highorder multiderivative integrators for hyperbolic conservation laws.
David C Seal*, Michigan State University
Yaman Guclu, Michigan State University
Andrew Christlieb, Michigan State University
(109065433) 
3:45 p.m.
Energy conserving schemes for VlasovAmpere and VlasovMaxwell system.
Yingda Cheng*, Michigan State University
Andrew Christlieb, Michigan State University
Xinghui Zhong, Michigan State University
(109065405) 
4:15 p.m.
Maximumprinciplesatisfying high order Direct discontinuous Galerkin method for convection diffusion equations.
Jue Yan*, Iowa State University
(109065133) 
4:45 p.m.
Resolution of source singularities for the pointsource eikonal equations with systematic factorization approach.
Songting Luo*, Iowa State University
(109065342) 
5:15 p.m.
Datadriven tight frame construction and image denoising.
JianFeng Cai*, University of Iowa
Sibin Huang, National University of Singapore
Hui Ji, National University of Singapore
Zuowei Shen, National University of Singapore
GuiBo Ye, University of Iowa
(109065418)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:05 p.m.
Special Session on Numerical Methods for Geometric Partial Differential Equations, II
Room 124, Carver
Organizers:
Gerard Awanou, University of Illinois at Chicago awanou@math.uic.edu
Nicolae Tarfulea, Purdue University

2:45 p.m.
Reflector Design and Optimal Mass Transport.
Tilmann Glimm*, Western Washington University
(109035220) 
3:15 p.m.
An Inverse Random Source Scattering Problem.
Peijun Li*, Purdue University
(109078256) 
3:45 p.m.
Compact embedding in the space of piecewise $H^1$ functions.
Sheng Zhang*, Wayne State University
(109065302) 
4:15 p.m.
Visualizing optimal transportation maps.
Michael J. Lindsey*, Stanford University
Yanir Rubinstein, University of Maryland
Otis Chodosh, Stanford University
Vishesh Jain, Stanford University
Lyuboslav Panchev, Stanford University
(109051436) 
4:45 p.m.
Generalized Finite Element Method for Elliptic Equations with Essential Boundary Conditions.
Nicolae Tarfulea*, Purdue University Calumet
(109065401)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Operator Algebras and Topological Dynamics, II
Room 4, Carver
Organizers:
Benton L. Duncan, North Dakota State University benton.duncan@ndsu.edu
Justin R. Peters, Iowa State University

2:45 p.m.
A Groupoid Generalization of Leavitt Path Algebras.
Cynthia Farthing*, University of Iowa
Lisa Orloff Clark, University of Otago
Aidan Sims, University of Wollongong
Mark Tomforde, University of Houston
(109016212) 
3:15 p.m.
Infinite products.
Palle E T Jorgensen*, University of Iowa
(10904749) 
4:15 p.m.
Dilation theory, commutant lifting and semicrossed products.
Kenneth R. Davidson*, Pure Mathematics Dept., University of Waterloo
Elias G. Katsoulis, Department of Mathematics, East Carolina University
(109047141) 
5:15 p.m.
Tensor Algebras, Intertwiners and Taylor's Taylor Series.
Paul S. Muhly*, University of Iowa
Baruch Solel, Technion
(109047142)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Partial Differential Equations, II
Room 204, Carver
Organizers:
Gary Lieberman, Iowa State University
Paul Sacks, Iowa State University psacks@iastate.edu
Mahamadi Warma, University of Puerto Rico at Rio Piedras

2:45 p.m.
On degenerate parabolic equations with dynamic boundary conditions.
Ciprian G Gal*, Florida International University
(10903537) 
3:15 p.m.
Attractors of the Hyperbolic Relaxation of Reaction Diffusion Equations with Dynamic Boundary Conditions.
Joseph L. Shomberg*, Providence College
Ciprian G. Gal, Florida International University
(10903538) 
3:45 p.m.
Regular Solutions for Wave Equations with Supercritical Sources and ExponentialtoLogarithmic Damping.
Lorena Bociu*, NC State University
Petronela Radu, University of NebraskaLincoln
Daniel Toundykov, University of NebraskaLincoln
(109035208) 
4:15 p.m.
Global MuckenhouptWheeden type bounds on Reifenberg flat domains, with applications to quasilinear Riccati type equations.
Phuc Cong Nguyen*, Louisiana State University
(109035100) 
4:45 p.m.
Vanishing of LongTime Average Viscosity for SQG Equations.
Andrei Tarfulea*, Princeton University
(109035123) 
5:15 p.m.
Liquid bridges between balls: the small volume instability.
Thomas I Vogel*, Texas A&M University
(10907687)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Probabilistic and Multiscale Modeling Approaches in Cell and Systems Biology, II
Room 202, Carver
Organizers:
Jasmine Foo, University of Minnesota
Anastasios Matzavinos, Iowa State University tasos@iastate.edu

2:45 p.m.
Assembling the tree of life: theory beyond the substitutiononly model of sequence evolution.
Sebastien Roch*, University of WisconsinMadison
(109060331) 
3:45 p.m.
Model development and computational methods for biochemical reaction networks with stochastic dynamics.
David F. Anderson*, University of Wisconsin  Madison
(109060303) 
4:45 p.m.
A Coupled Finite Difference Method for Efficient Computation of Parameter Sensitivities of Discrete Stochastic Biochemical Reaction Networks.
Elizabeth Skubak Wolf*, University of Wisconsin  Madison
David F. Anderson, University of Wisconsin  Madison
(109060143)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Quasigroups, Loops, and Nonassociative Division Algebras, II
Room 68, Carver
Organizers:
C. E. Ealy, Jr., Western Michigan University clifton.e.ealy@wmich.edu
Benjamin Phillips, University of Michigan Dearborn
J. D. Phillips, Northern Michigan University
Petr Vojtechovsky, University of Denver

3:15 p.m.
A family of even ordered simple loops.
Benjamin A Phillips*, University of Michigan Dearborn
(109020399) 
3:45 p.m.
Onesided inner mapping groups and multiplication groups of CayleyDickson loops.
Jenya Kirshtein*, University of Denver
(109020426) 
4:15 p.m.
The existence problem for strong complete mappings.
Anthony B. Evans*, Wright State University
(10902034) 
4:45 p.m.
Construction of minimally nonassociative Moufang loops of odd order.
Andrew Rajah*, Universiti Sains Malaysia, Penang, Malaysia
(109020371) 
5:15 p.m.
The structure of conjugacy closed loops.
J.D. Phillips*, Northern Michigan University
(10902032)

3:15 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Ring Theory and Noncommutative Algebra, II
Room 98, Carver
Organizers:
Victor Camillo, University of Iowa
Miodrag C. Iovanov, University of Bucharest and University of Iowa yovanov@gmail.com

2:45 p.m.
Closures of orbits of dimension 2.
Frauke M. Bleher*, University of Iowa
Ted Chinburg, University of Pennsylvania
Birge HuisgenZimmermann, UC Santa Barbara
(109016253) 
3:15 p.m.
FRTBialgebras and Quantum Schubert Cells.
Garrett Johnson*, The Catholic University of America
Christopher Nowlin, Elkridge, MD
(109017360) 
3:45 p.m.
PBW deformations of ArtinSchelter regular algebras.
Jason Gaddis*, University of Wisconsin  Milwaukee
(10901618) 
4:15 p.m.
Do universal deformation rings recognize fusion?
David C Meyer*, University of Iowa
(109020263) 
4:45 p.m.
A Divided Difference Operator for the Hessenberg Representation.
Nicholas Teff*, University of Iowa
(109020362) 
5:15 p.m.
Cellular bases in towers of cellular algebras.
Frederick Goodman*, University of Iowa
(109016409)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Stochastic Processes with Applications to Physics and Control, II
Room 196, Carver
Organizers:
Jim Evans, Iowa State University evans@ameslab.gov
Arka Ghosh, Iowa State University
Jon Peterson, Purdue University
Alexander Roitershtein, Iowa State University

2:45 p.m.
From asymmetric exclusion processes to protein synthesis.
Beate Schmittmann*, Department of Physics & Astronomy, Iowa State University
Jiajia Dong, Department of Physics & Astronomy, Bucknell University
Royce K.P. Zia, Department of Physics, Virginia Tech
(109060233) 
3:15 p.m.
Nonequilibrium FirstOrder Transition in the Quadratic Contact Process or Schloegl's second Model.
DaJiang Liu*, Ames Laboratory (USDOE)
ChiJen Wang, Iowa State University
J. W. Evans, Ames Laboratory and Iowa State University
(109060314) 
3:45 p.m.
Inhomogeneous Tilings of the Aztec Diamond.
Gregory Shinault*, University of WisconsinMadison
(10906085) 
4:15 p.m.
Emergence of Spatial Community Structure in Biological Metacommunities.
Per Arne Rikvold*, Florida State University
Elise Filotas, Universite de Montreal
Lael Parrott, University of British Columbia
Martin Grant, Mc Gill University
(109060164) 
4:45 p.m.
Tuning the kinetics of cellcell adhesion.
Sanjeevi Sivasankar*, Iowa State University
Kristine Manibog, Iowa State University
Sabyasachi Rakshit, Iowa State University
Hui Li, Iowa State University
(109092333) 
5:15 p.m.
Modeling evaporation & phaseseparation in thin film evaporation: CahnHilliardCook equations, adaptive timestepping and Linear stability analysis.
Baskar Ganapathysubramanian*, Iowa State University
(109035437)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Topology of 3Manifolds, II
Room 294, Carver
Organizers:
Marion Campisi, University of Texas at Austin
Alexander Zupan, University of Texas at Austin zupan@math.utexas.edu

2:45 p.m.
The link volume of hyperbolic 3manifolds.
Yo'av Rieck*, University of Arkansas
Yasuahi Yamashita, Nara Women's University
(109057291) 
3:15 p.m.
Current Progress on the Two Summands Conjecture.
Nicholas T Zufelt*, University of Texas at Austin
(109057295) 
3:45 p.m.
Progress on the Cabling Conjecture.
Ryan Blair, UPENN
Marion Campisi, UT Austin
Jesse Johnson, Oklahoma State University
Scott Taylor, Colby College
Maggy Tomova*, The University of Iowa
(109057160) 
4:15 p.m.
Genus two bridge number for a knot admitting an $S^3$ surgery.
John Luecke*, University of Texas at Austin
Ken Baker, University of Miami
Cameron Gordon, University of Texas at Austin
(109057398) 
4:45 p.m.
Knots with two lens space surgeries.
Ken Baker, University of Miami
Brandy Guntel Doleshal*, Sam Houston State University
Neil Hoffman, Max Planck Institute
(109057288) 
5:15 p.m.
Dehn surgery and bridge number of knots in handlebodies.
R Sean Bowman*, Oklahoma State University
(109057216)

2:45 p.m.

Saturday April 27, 2013, 2:45 p.m.5:35 p.m.
Special Session on Zero Forcing, Maximum Nullity/Minimum Rank, and Colin de Verdiere Graph Parameters, II
Room 205, Carver
Organizers:
Leslie Hogben, Iowa State University and American Institute of Mathematics hogben@aimath.org
Bryan Shader, University of Wyoming

2:45 p.m.
Minimum rank $3$ is difficult to determine.
H. Tracy Hall*, Brigham Young University
(109015424) 
3:15 p.m.
Maximum Nullity and Zero Forcing Number of Subdivided Graphs.
Michael Young*, Iowa State University
(109005335) 
3:45 p.m.
Minimum rank for circulant graphs and bipartite circulant graphs.
Seth A Meyer*, Saint Norbert College
(109005218) 
4:15 p.m.
Minimum rank, maximum nullity, and zero forcing number of simple digraphs.
Adam Berliner*, St. Olaf College
Minerva Catral, Xavier University
Leslie Hogben, Iowa State University
My Huynh, Cornell University
Kelsey Lied, St. Olaf College
Michael Young, Iowa State University
(109015186) 
4:45 p.m.
Zero Forcing Leads to Iteration and Domination.
Nathaniel Dean*, Texas State University
(109005279) 
5:15 p.m.
Positive Semidefinite Propagation Time.
Nathan J Warnberg*, Iowa State University
(10901569)

2:45 p.m.

Saturday April 27, 2013, 5:45 p.m.6:35 p.m.
Invited Address
Virtual classification of 3manifolds.
Room 1, Carver
Vladimir Markovic*, California Institute of Technology
(10905103)
Sunday April 28, 2013

Sunday April 28, 2013, 7:30 a.m.12:00 p.m.
Book Sale and Exhibit
Room 305, Carver 
Sunday April 28, 2013, 7:30 a.m.12:00 p.m.
Meeting Registration
Room 305, Carver 
Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Algebraic and Geometric Combinatorics, III
Room 74, Carver
Organizers:
Sung Y. Song, Iowa State University sysong@iastate.edu
Paul Terwilliger, University of WisconsinMadison

8:00 a.m.
Table Bases as Unions of Proper Closed Subsets.
Harvey I Blau*, Department of Mathematical Sciences, Northern Illinois University
Gang Chen, School of Mathematics and Statistics, Central China Normal University
(109020147) 
8:30 a.m.
The Tail Condition for Leonard Pairs.
Edward D. Hanson*, University of WisconsinMadison
(109005407) 
9:00 a.m.
Nonexistence of certain abstract hyperovals of order 12.
Benjamin C Cooper*, Department of Mathematics, Colorado State University
(109005308) 
9:30 a.m.
Noncommutative association schemes of rank $6$.
PaulHermann Zieschang*, Department of Mathematics, University of Texas at Brownsville
(10902065) 
10:00 a.m.
$Q$polynomial distanceregular graphs and the double affine Hecke algebra of rank one.
JaeHo Lee*, University of WisconsinMadison
(10903393) 
10:30 a.m.
Spreads and Packings in PG$(3,q)$.
Anton Betten*, Colorado State University
(109005114)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Analysis, Dynamics and Geometry In and Around Teichmuller Spaces, III
Room 118, Carver
Organizers:
Alistair Fletcher, Northern Illinois University
Vladimir Markovic, California Institute of Technology
Dragomir Saric, Queens College CUNY dragomir.saric@qc.cuny.edu

8:30 a.m.
Discussion 
9:00 a.m.
Recent developments on the ergodicity of translation flows on flat surfaces.
Rodrigo Trevino*, Cornell University
(10903748) 
9:30 a.m.
Projective structures on closed surfaces and the geometry of diffeomorphisms.
Ferry Henrik Kwakkel*, University of Sao Paulo, Sao Paulo, Brazil
(109051343) 
10:00 a.m.
Induced earthquake measure map on asymptotic Teichmüller space.
Jinhua Fan*, Department of Applied Mathematics, Nanjing University of Science and Technology
Jun Hu, Department of Mathematics, Brooklyn College of CUNY
(109030232) 
10:30 a.m.
On Teichmüller metric and the length spectra of topologically infinite Riemann surfaces.
Erina Kinjo*, Tokyo Institute of Technology, Department of Mathematical and Computing Sciences
(109030194)

8:30 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Commutative Algebra and its Environs, III
Room 8, Carver
Organizers:
Olgur Celikbas, University of Missouri, Columbia
Greg Piepmeyer, University of Missouri, Columbia ggpz95@mail.missouri.edu

8:00 a.m.
Resurgences: the road ahead and a look back.
Brian Harbourne*, University of NebraskaLincoln
(109014245) 
9:00 a.m.
Codualizing Modules And Complexes.
Sean SatherWagstaff, North Dakota State University
Richard Wicklein*, North Dakota State University
(109013323) 
9:30 a.m.
Periodic modules over Gorenstein local rings.
Amanda Croll*, University of NebraskaLincoln
(109013301) 
10:00 a.m.
Cohen factorizations and applications.
Saeed Nasseh*, North Dakota State University
Sean SatherWagstaff, North Dakota State University
(109013340) 
10:30 a.m.
$F$pure thresholds of quasihomogeneous polynomials.
Daniel Heranadez, University of Minnesota
Luis NunezBetancourt, University of Michigan
Emily Witt, University of Minnesota
Wenliang Zhang*, University of Nebraska
(109013374)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Commutative Ring Theory, III
Room 18, Carver
Organizers:
Michael Axtell, University of St. Thomas
Joe Stickles, Millikin University jstickles@millikin.edu

8:00 a.m.
Length MultisetComplete Krull Monoids.
Paul Baginski*, Smith College
George J Schaeffer, University of California, Los Angeles
(109013395) 
8:30 a.m.
Multiplicative Subsets of Atoms.
Ashley Rand*, University of Tennessee, Knoxville
(109013316) 
9:00 a.m.
Prüfer domains and the projective line.
Bruce Olberding*, New Mexico State University
(109013196) 
9:30 a.m.
Localizing Global Properties to Individual Maximal Ideals.
Thomas G Lucas*, Department of Mathematics & Statistics, University of North Carolina Charlotte
(109013324) 
10:00 a.m.
Some nearNoetherian conditions.
Jim Coykendall*, North Dakota State University
Tridib Dutta, University of Pittsburgh
(109013272) 
10:30 a.m.
Ascent properties for derived functors.
Sean SatherWagstaff*, North Dakota State University
(10901395)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Computability and Complexity in Discrete and Continuous Worlds, III
Room 290, Carver
Organizers:
Jack Lutz, Iowa State University
Tim McNicholl, Iowa State University mcnichol@iastate.edu

8:00 a.m.
Combining basis theorems.
Stephen G. Simpson*, Pennsylvania State University
(10900356) 
8:30 a.m.
On the Complexity of Bribery and Manipulation in Tournaments with Uncertain Information.
Nicholas Mattei, NICTA and University of New South Wales
Judy Goldsmith*, Dept of Computer Science, University of Kentucky
Andrew Klapper, Dept of Computer Science, University of Kentucky
Martin Mundhenk, Institute of Computer Science FriedrichSchillerUniversität Jena
(109068385) 
9:00 a.m.
PolynomialTime Randomness and Differentiability.
John M. Hitchcock*, University of Wyoming
Joshua C. Sanderlin, University of Wyoming
(109068414) 
9:30 a.m.
On the Computable Curves.
Xizhong Zheng*, Arcadia University
(109003149) 
10:00 a.m.
Complexity and Symmetry.
LekHeng Lim*, University of Chicago
Ke Ye, University of Chicago
(109015267) 
10:30 a.m.
Strong separations and Kolmogorov complexity.
W.M. Phillip Hudelson*, Pennsylvania State University
(10900391)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Computational Advances on Special Functions and Tropical Geometry, III
Room 2, Carver
Organizers:
Lubjana Beshaj, Oakland University
Emma Previato, Boston University ep@bu.edu

9:30 a.m.
Algorithmic unsolvability in geometry.
Wesley Calvert*, Southern Illinois University
Valentina Harizanov, George Washington University
Alexandra Shlapentokh, East Carolina University
(109003128) 
10:00 a.m.
Lifting techniques for polynomial systems.
Eric Schost*, Western University
(109068429) 
10:30 a.m.
Heterotic/Ftheory duality and lattice polarized K3 surfaces.
Andreas Malmendier*, Colby College
Ken Ono, Emory University
(109014376)

9:30 a.m.

Sunday April 28, 2013, 8:00 a.m.9:50 a.m.
Special Session on Control Theory and Qualitative Analysis of Partial Differential Equations, III
Room 132, Carver
Organizers:
George Avalos, University of NebraskaLincoln gavalos@math.unl.edu
Scott Hansen, Iowa State University

8:00 a.m.
A Frequency Domain Approach for obtaining Polynominal Decay for Certain Coupled PDE Models.
George Avalos*, University of NebraskaLincoln
(109035227) 
8:30 a.m.
Explicit Approximations of Bilinear Controls using Interpolation.
Katherine A. Kime*, University of Nebraska Kearney
(10909380) 
9:00 a.m.
Stability and Regularity of an Abstract System of Coupled Hyperbolic and Parabolic System.
Zhuangyi Liu*, Department of Mathematics and Statistics, University of Minneosta Duluth
(109035167) 
9:30 a.m.
Exact nullcontrollability of heat equation with singular specific heat.
Scott Hansen*, Iowa State University
Jose de Jesus Martinez, Iowa State University
(109093266)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Discrete Methods and Models in Mathematical Biology, III
Room 298, Carver
Organizers:
Dora Matache, University of NebraskaOmaha
Stephen J. Willson, Iowa State University swillson@iastate.edu

8:30 a.m.
The neural ring: an algebraic tool for analyzing neural codes.
Carina Curto*, University of NebraskaLincoln
(109092315) 
9:00 a.m.
Encoding simplicial complexes by neural networks.
Vladimir Itskov*, University of NebraskaLincoln
Carina Curto, University of NebraskaLincoln
Chad Giusti, University of NebraskaLincoln
(109092163) 
9:30 a.m.
Reverse Engineering of Regulatory Networks Using Algebraic Geometry.
Alan VelizCuba*, University of NebraskaLincoln
(10909205) 
10:00 a.m.
Abstract algebra and the logic of gene expression.
Anna B. Romanowska, Warsaw University of Technology
Jonathan D.H. Smith*, Iowa State University
(109092151) 
10:30 a.m.
Discussion

8:30 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Extremal Combinatorics, III
Room 268, Carver
Organizers:
Steve Butler, Iowa State University
Ryan Martin, Iowa State University rymartin@iastate.edu

9:00 a.m.
Forbidden Families of Configurations.
Richard P Anstee*, UBC Mathematics
Christina Koch, UBC Mathematics
(10900555) 
9:30 a.m.
Turán and Ramsey Results for Boolean Algebras.
Travis Johnston, University of South Carolina
Linyuan Lu, University of South Carolina
Kevin G. Milans*, West Virginia University
(109005381) 
10:00 a.m.
Turán Problems on Nonuniform Hypergraphs.
Linyuan Lu*, University of South Carolina
Travis Johnston, University of South Carolina
(109005420) 
10:30 a.m.
Treewidth and Dimension.
Gwenaël Joret, Université Libre de Bruxelles, Belgium
Piotr Micek, Jagiellonian University, Poland
Kevin G Milans, West Virginia University
William T Trotter, Georgia Institute of Technology
Bartosz Walczak, Jagiellonian University, Poland
Ruidong Wang*, Georgia Institute of Technology
(109005125)

9:00 a.m.

Sunday April 28, 2013, 8:00 a.m.9:20 a.m.
Special Session on Generalizations of Nonnegative Matrices and Their Sign Patterns, III
Room 232, Carver
Organizers:
Minerva Catral, Xavier University catralm@xavier.edu
Shaun Fallat, University of Regina
Pauline van den Driessche, University of Victoria

8:00 a.m.
Factorization of matrices into matrices with prescribed zero and nonzero patterns.
ChiKwong Li*, Department of Mathematics, College of William and Mary
(10901577) 
8:30 a.m.
On the Structure of the Set of Symmetric Matrices with the PerronFrobenius Property.
Pablo Tarazaga*, Texas A&M University, Corpus Christi
(109015230) 
9:00 a.m.
Discussion

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Geometric Elliptic and Parabolic Partial Differential Equations, III
Room 128, Carver
Organizers:
Brett Kotschwar, Arizona State University kotschwar@asu.edu
Xuan Hien Nguyen, Iowa State University

8:00 a.m.
A reduction theorem for Spin(7) manifolds.
Mihai Bailesteanu*, University of Rochester
(109053237) 
9:00 a.m.
Rigidity of Selfsimilar Solutions of Geometric Flows.
Lu Wang*, Johns Hopkins University
(109053403) 
10:00 a.m.
The Zoo of Solitons for Curve Shortening in $\mathbb{R}^n$.
Sigurd B Angenent*, Math Department, UW Madison
(109035396)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Graphs, Hypergraphs and Counting, III
Room 274, Carver
Organizers:
Eva Czabarka, University of South Carolina czabarka@math.sc.edu
Laszlo Szekely, University of South Carolina

8:00 a.m.
On Erdős' unit distances problem.
Jozsef Solymosi*, University of British Columbia
(109005281) 
9:00 a.m.
Bijective proofs of Jensen's identity and MohantyHanda's identity.
Nicholas A. Loehr*, Virginia Tech Dept. of Math and USNA Dept. of Math
R. Daniel Mauldin, University of North Texas Dept. of Mathematics
(109005103) 
9:30 a.m.
High order phase transition in random hypergraphs.
Linyuan Lu, Department of Mathematics, University of South Carolina
Xing Peng*, Department of Mathematics, University of California, San Diego
(109005121) 
10:00 a.m.
2colorability of hypergraphs using commutative algebra.
L. Thoma*, Department of Mathematics, University of Rhode Island
(10900533) 
10:30 a.m.
Chromatic Numbers of Copoint Graphs of Convex Geometries.
Jonathan E Beagley, Department of Mathematical Sciences, George Mason University
Walter D Morris*, Department of Mathematical Sciences, George Mason University
(10900519)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Kinetic and Hydrodynamic PDEbased Descriptions of Multiscale Phenomena, III
Room 160, Carver
Organizers:
James Evans, Iowa State University
Hailiang Liu, Iowa State University
Eitan Tadmor, University of Maryland tadmor@cscamm.umd.edu

8:00 a.m.
Relative entropy, stability of shocks for conservation laws, and applications to asymptotic limits.
Alexis F. Vasseur*, University of Texas at Austin
Kyudong Choi, University of Wisconsin at Madison
Nicholas Leger, Carnegie Mellon
(109035430) 
9:00 a.m.
A class of nonlocal conservation laws: local wellposedness and subthresholds for finite time shock formation.
Yongki Lee*, Department of Mathematics, Iowa State University
Hailiang Liu, Department of Mathematics, Iowa State University
(109035286) 
9:30 a.m.
Critical thresholds on compressible Eulerian dynamics with nonlocal alignment.
Changhui Tan*, University of Maryland
(109035392) 
10:00 a.m.
Compressible NavierStokes equations with temperature dependent dissipation.
Ronghua Pan*, Georgia Institute of Technology
Weizhe Zhang, Georgia Institute of Technology
(109035391)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on MultiDimensional Dynamical Systems, III
Room 190, Carver
Organizers:
Jayadev Athreya, University of Illinois, UrbanaChampaign jathreya@illinois.edu
Jonathan Chaika, University of Chicago
Joseph Rosenblatt, University of Illinois at UrbanaChampaign

9:00 a.m.
Discussion 
9:30 a.m.
Typical Homeomorphisms.
Kelly B Yancey*, University of Illinois at UrbanaChampaign
(109037406) 
10:00 a.m.
Fixed points of nilpotent actions on surfaces.
K. Parwani*, Eastern Illinois University
(109037257) 
10:30 a.m.
Fuchsian groups and generalized BowenSeries transformations.
Svetlana Katok, The Pennsylvania State University
Ilie Ugarcovici*, DePaul University
(109037377)

9:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Numerical Analysis and Scientific Computing, III
Room 150, Carver
Organizers:
Hailiang Liu, Iowa State University hliu@iastate.edu
Songting Luo, Iowa State University
James Rossmanith, Iowa State University
Jue Yan, Iowa State University

8:00 a.m.
No artificial numerical viscosity: from the 1/3 rule to entropy stable approximations of NavierStokes and related equations.
Eitan Tadmor*, University of Maryland
(109065169) 
9:00 a.m.
A New RungeKutta Discontinuous Galerkin Method with Conservation Constraints to Improve CFL Condition for Solving Conservation Laws.
Zhiliang Xu, Notre Dame
XuYan Chen, Georgia Tech
Yingjie Liu*, School of Math, Georgia Tech
(109065264) 
9:30 a.m.
An Efficient Rescaling Algorithm for Simulating the Evolution of Multiple Elastically Stressed Precipitates.
Shuwang Li*, Illinois Institute of Technology
(109074221) 
10:00 a.m.
Discretization of Stochastic Optimal Control Problems by the $h \times p$ Version of the Stochastic Galerkin FEM.
Jangwoon (Leo) Lee*, University of Mary Washington
HyungChun Lee, Ajou University
(109065126) 
10:30 a.m.
Direct Discontinuous Galerkin Methods for Dispersive Integrable Equations.
Hailiang Liu*, Iowa State University
(109065357)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Operator Algebras and Topological Dynamics, III
Room 4, Carver
Organizers:
Benton L. Duncan, North Dakota State University benton.duncan@ndsu.edu
Justin R. Peters, Iowa State University

8:00 a.m.
Simplicity of etale groupoid C*algebras.
Jonathan Henry Brown*, Kansas State University
(10904666) 
9:00 a.m.
Bimodules over Cartan Algebras in von Neumann Algebras and an Assertion of Mercer.
Jan Cameron, Vassar College
David R Pitts*, University of NebraskaLincoln
Vrej Zarikian, U. S. Naval Academy
(109047189) 
9:30 a.m.
The Lattice of BuresClosed Bimodules in Cartan Pairs.
Adam H. Fuller*, University of Nebraska  Lincoln
David R. Pitts, University of Nebraska  Lincoln
(109047310) 
10:00 a.m.
States on kGraph C*algebras.
Jonathan H Brown, Kansas State University
Gabriel Nagy, Kansas State University
Sarah A Reznikoff*, Kansas State University
(109046415) 
10:30 a.m.
Subspaces of vN(G) and bimodules over maximal abelian selfadjoint algebras.
M. Anoussis, Department of Mathematics, University of the Aegean, Samos, Greece
A. Katavolos*, Department of Mathematics, University of Athens, Greece
I. G. Todorov, Pure Mathematics Research Centre, Queen's University Belfast, United Kingdom
(109047131)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Partial Differential Equations, III
Room 204, Carver
Organizers:
Gary Lieberman, Iowa State University
Paul Sacks, Iowa State University psacks@iastate.edu
Mahamadi Warma, University of Puerto Rico at Rio Piedras

8:00 a.m.
Finite energy function spaces on exterior regions.
Qi Han*, Math Department, University of Houston
Giles Auchmuty, Math Department, University of Houston
(10903516) 
8:30 a.m.
Regularization of steady point vortices for the ideal fluids.
Daomin CAO*, Institute of Applied Mathematics,Chinese Academy of Sciences,P.R.China
(10903596) 
9:00 a.m.
Regularity criteria of Ndimensional porous media equation in terms of one partial derivative or pressure scalar field.
Kazuo Yamazaki*, Department of Mathematics, Oklahoma State University
(10903506) 
9:30 a.m.
Slightly supercritical dissipative operators related to 2D Boussinesq equations.
Lizheng Tao*, Oklahoma State University
Durga K.C., Oklahoma State University
Dipendra Regmi, Oklahoma State University
Jiahong Wu, Oklahoma State University
(10903586) 
10:00 a.m.
Global Wellposedness for 2D Radial Schrödinger Maps into the Sphere.
Eva Hang Koo*, University of Iowa
Stephen Gustafson, University of British Columbia
(109035274) 
10:30 a.m.
A nonlinear movingboundary parabolichyperbolic problem arising in blood flow modeling: a constructive existence proof.
Suncica Canic*, University of Houston
Boris Muha, University of Zagreb
(10903536)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Probabilistic and Multiscale Modeling Approaches in Cell and Systems Biology, III
Room 202, Carver
Organizers:
Jasmine Foo, University of Minnesota
Anastasios Matzavinos, Iowa State University tasos@iastate.edu

8:00 a.m.
A delay differential equation model of combination chemotherapy targeting ovarian cancers.
Harsh Jain*, Mathematics, Florida State University
Alan Richardson, ISTM, Keele University, UK
Helen Byrne, OCCAM and Computer Science, University of Oxford, UK
(109092341) 
9:00 a.m.
Numerical methods for chemotaxis models.
Yekaterina Epshteyn*, University of Utah
(109065122) 
10:00 a.m.
The Effects of Cyclic Loading on Articular Cartilage Lesion Formation.
Xiayi Wang, University of Iowa
Bruce P. Ayati*, University of Iowa
Jason M. Graham, University of Scranton
Prem S. Ramakrishnan, University of Iowa
James A. Martin, University of Iowa
(109092268)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Quasigroups, Loops, and Nonassociative Division Algebras, III
Room 68, Carver
Organizers:
C. E. Ealy, Jr., Western Michigan University clifton.e.ealy@wmich.edu
Benjamin Phillips, University of Michigan Dearborn
J. D. Phillips, Northern Michigan University
Petr Vojtechovsky, University of Denver

8:30 a.m.
Structure Theory of CIGroupoids of BolMoufang Type.
David Failing*, Iowa State University
(109008214) 
9:00 a.m.
A class of loops categorically isomorphic to Bruck loops of odd order.
Mark B. Greer*, University of Denver
(109020188) 
9:30 a.m.
Dihedrallike constructions of automorphic loops.
Mouna R Aboras*, University of Denver
(10902058) 
10:00 a.m.
Magic squares of Lie groups.
Tevian Dray*, Oregon State University
John Huerta, Instituto Superior Tecnico, Lisboa
Joshua Kincaid, Oregon State University
Corinne A. Manogue, Oregon State University
Aaron Wangberg, Winona State University
Robert A. Wilson, Queen Mary, University of London
(109017400) 
10:30 a.m.
Loops presented by finite automata.
Michael Kinyon*, University of Denver
Rick M. Thomas, University of Leicester
(109020380)

8:30 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Ring Theory and Noncommutative Algebra, III
Room 98, Carver
Organizers:
Victor Camillo, University of Iowa
Miodrag C. Iovanov, University of Bucharest and University of Iowa yovanov@gmail.com

8:00 a.m.
Recent progress on clean and strongly clean rings.
Alexander J. Diesl, Wellesley College
Thomas J. Dorsey*, IDA/CCRLa Jolla
(109016425) 
8:30 a.m.
Quasipolar and Pseudopolar Matrix Rings.
Alexander J Diesl*, Wellesley College
Thomas J Dorsey, Center for Communications Research
(109016290) 
9:00 a.m.
Generalizations of Shoda's Theorem.
Zak Mesyan*, University of Colorado, Colorado Springs
(109016224) 
9:30 a.m.
Periodic free resolutions from noncommutative matrix factorizations.
Andrew Conner*, Wake Forest University
Ellen Kirkman, Wake Forest University
W. Frank Moore, Wake Forest University
(109016215) 
10:00 a.m.
Jacobson Pairs and Regular Elements.
T.Y. Lam, University of California Berkeley
Pace P. Nielsen*, Brigham Young University
(10901639) 
10:30 a.m.
Diophantine Sets of Representations.
Ivo Herzog*, The Ohio State University at Lima
Sonia L'Innocente, University of Camerino
(109016155)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:50 a.m.
Special Session on Stochastic Processes with Applications to Physics and Control, III
Room 196, Carver
Organizers:
Jim Evans, Iowa State University evans@ameslab.gov
Arka Ghosh, Iowa State University
Jon Peterson, Purdue University
Alexander Roitershtein, Iowa State University

8:00 a.m.
Smalltime asymptotics of stopped Lévy bridges and simulation schemes with controlled bias.
Jose E FigueroaLopez*, Purdue University
Peter Tankov, Universite ParisDiderot (Paris 7)
(109060358) 
8:30 a.m.
Large deviations in multitime scale stochastic systems.
Rohini Kumar*, Wayne State University
Jin Feng, Kansas University
JeanPierre Fouque, University of California, Santa Barbara
(109060265) 
9:00 a.m.
Large Deviations for Stochastic Partial Differential Equations Driven by a Poisson Random Measure.
Amarjit Budhiraja, University of North CarolinaChapel Hill
Jiang Chen*, University of North CarolinaChapel Hill
Paul Dupuis, Lefschetz Center for Dynamical Systems, Division of Applied Mathematics, Brown University
(10906008) 
9:30 a.m.
Dynamic Scheduling for Markov Modulated Singleserver Multiclass Queueing Systems in Heavy Traffic.
Xin Liu*, University of Minnesota
Arka Ghosh, Iowa State University
Amarjit Budhiraja, University of North Carolina at Chapel Hill
(109060244) 
10:00 a.m.
Optimal rate for a queueing system in heavy traffic with superimposed OnOff arrivals.
Arka P Ghosh*, Iowa State University
(109060325) 
10:30 a.m.
Accumulation and spread of mutations in a spatially structured population.
Jasmine Foo*, University of Minnesota
(109060339)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:20 a.m.
Special Session on Topology of 3Manifolds, III
Room 294, Carver
Organizers:
Marion Campisi, University of Texas at Austin
Alexander Zupan, University of Texas at Austin zupan@math.utexas.edu

8:00 a.m.
Almost unknotted graphs: theorems, examples, conjectures.
Scott A. Taylor*, Colby College
Byoungwook Jang, Colby College
Pratap Luitel, Colby College
Alexander Zupan, University of Texas, Austin
(109057254) 
8:30 a.m.
Gabai degeneracy and fractional Dehn twist coefficients.
Rachel Roberts*, Washington University in St Louis
William H. Kazez, University of Georgia
(109057292) 
9:00 a.m.
High Distance Heegaard Splittings via Dehn Twists.
Michael Yoshizawa*, UC Santa Barbara
(10905776) 
9:30 a.m.
A lower bound on the Heegaard genus of amalgamated 3manifolds.
T F Schirmer*, Oklahoma State University
(109057311) 
10:00 a.m.
Farey Diagrams, simple closed curves, and multiplication in the Kauffman bracket skein algebra of a punctured torus.
Charles Frohman*, The University of Iowa
(10905799)

8:00 a.m.

Sunday April 28, 2013, 8:00 a.m.10:20 a.m.
Special Session on Zero Forcing, Maximum Nullity/Minimum Rank, and Colin de Verdiere Graph Parameters, III
Room 205, Carver
Organizers:
Leslie Hogben, Iowa State University and American Institute of Mathematics hogben@aimath.org
Bryan Shader, University of Wyoming

8:00 a.m.
Matchings and Minimum Skew Zero Forcing Sets of Some Multipartite Graphs.
Luz M. DeAlba*, Drake University
(109005162) 
8:30 a.m.
New perspectives on Rosenfeld's theorem.
Louis Deaett*, Quinnipiac University
(109015185) 
9:00 a.m.
Colin de Verdièretype invariants for signed graphs and odd$K_4$ and odd$K^2_3$free signed graphs.
Hein van der Holst*, Georgia State University, Atlanta, Georgia
Marina Arav, Georgia State University, Atlanta, Georgia
Frank Hall, Georgia State University, Atlanta, Georgia
Zhongshan Li, Georgia State University, Atlanta, Georgia
(109005152) 
9:30 a.m.
Colin de Verdière Parameters of Chordal Graphs.
Shaun M Fallat*, University of Regina
Lon H Mitchell, American Mathematical Society
(109015109) 
10:00 a.m.
Getting something for nothing (using transversality, linear algebra and combinatorics).
Bryan L Shader*, University of Wyoming
(109015204)

8:00 a.m.

Sunday April 28, 2013, 8:30 a.m.10:55 a.m.
Contributed Paper Session I
Room 124, Carver

8:30 a.m.
On computability and complexity of Pierce and Engel expansions.
Iraj Kalantari, Western Illinois University
Mojtaba Moniri*, Western Illinois University
(109003432) 
8:45 a.m.
Sums and products of smooth numbers.
David J. Covert*, University of Missouri  Saint Louis
(109011246) 
9:00 a.m.
On $(i,j,k)$coloring of sparse graphs.
Andre Raspaud*, LaBRI, Bordeaux University, 351 cours de la Liberation, 33450 TALENCE cedex, FRANCE
(10900553) 
9:15 a.m.
Discussion 
9:30 a.m.
(0,1)improper coloring of sparse graph.
Jaehoon Kim*, University of Illinois at UrbanaChampaign
Alexandr V Kostochka, University of Illinois at UrbanaChampaign
Xuding Zhu, National Sun Yatsen University
(109005157) 
9:45 a.m.
Local Clique Covering of Graphs.
Ramin Javadi, Isfahan University of Technology
Zeinab Maleki*, Isfahan University of Technology and University of Illinois UrbanaChampaign
Behnaz Omoomi, Isfahan University of Technology
(109005247) 
10:00 a.m.
Large incidencefree sets in geometries.
Stefaan De Winter*, Michigan Technological University
(109005322) 
10:15 a.m.
Edge exchanges and realizations of $k$graphic sequences.
Sarah Behrens*, University of NebraskaLincoln
Catherine Erbes, University of Colorado Denver
Michael Ferrara, University of Colorado Denver
Stephen Hartke, University of NebraskaLincoln
Ben Reiniger, University of Illinois UrbanaChampaign
Hannah Spinoza, University of Illinois UrbanaChampaign
Charles Tomlinson, University of NebraskaLincoln
(109005422) 
10:30 a.m.
Lower Bound Techniques for Radio Numbers of Trees.
Katherine Benson*, The University of Iowa
(109005102) 
10:45 a.m.
Positive semidefinite maximum nullity and zero forcing number.
Travis Peters*, CulverStockton College
(10901535)

8:30 a.m.

Sunday April 28, 2013, 11:05 a.m.11:55 a.m.
Invited Address
Differentiability of Lipschitz functions and tangents of sets.
Room 1, Carver
Marianna Csörnyei*, University of Chicago
(10902802) 
Sunday April 28, 2013, 1:30 p.m.2:20 p.m.
Invited Address
The algebraic structure of perturbative quantum field theory.
Room 1, Carver
Kevin Costello*, Northwestern University
(10900101) 
Sunday April 28, 2013, 2:30 p.m.4:50 p.m.
Special Session on Algebraic and Geometric Combinatorics, IV
Room 74, Carver
Organizers:
Sung Y. Song, Iowa State University sysong@iastate.edu
Paul Terwilliger, University of WisconsinMadison

2:30 p.m.
A characterization of commutative standard table algebras with at most one nontrivial multiplicity.
Angela L. Antonou*, Northern Illinois University
(109020200) 
3:00 p.m.
Totally bipartite Leonard pairs and Leonard triples.
George M. F. Brown*, University of WisconsinStout
(109005354) 
3:30 p.m.
Functors from Association Schemes.
Christopher P French*, Grinnell College
(109020213) 
4:00 p.m.
Schur indices of the rational adjacency algebras of coherent configurations.
Allen Herman*, University of Regina
(109016137) 
4:30 p.m.
Toric partial orders.
Mike Develin, Menlo Park, CA
Matthew Macauley*, Clemson University
Victor Reiner, University of Minnesota
(109005388)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.4:20 p.m.
Special Session on Analysis, Dynamics and Geometry In and Around Teichmuller Spaces, IV
Room 118, Carver
Organizers:
Alistair Fletcher, Northern Illinois University
Vladimir Markovic, California Institute of Technology
Dragomir Saric, Queens College CUNY dragomir.saric@qc.cuny.edu

2:30 p.m.
Extremal metrics for extremal length and modulus of measures.
Matthew Badger*, Stony Brook University
(10904979) 
3:00 p.m.
Quasiconformal Motion.
Yunping Jiang, CUNY, Graduate Center and Queens College
Sudeb Mitra, CUNY, Graduate Center and Queens College
Hiroshige Shiga, Tokyo Institute of Technology
Zhe Wang*, CUNY, Bronx Community College
(109030318) 
3:30 p.m.
Entropy rigidity in coarse geometry.
Kyle E. Kinneberg*, UCLA
(10905190) 
4:00 p.m.
Expansion and compression principles in quasiconformal mapping theory.
Christopher J. Bishop, Stony Brook University
Hrant Hakobyan*, Kansas State University
(109030412)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.3:50 p.m.
Special Session on Commutative Ring Theory, IV
Room 18, Carver
Organizers:
Michael Axtell, University of St. Thomas
Joe Stickles, Millikin University jstickles@millikin.edu

2:30 p.m.
An atomic domain that is not a comaximal factorization domain.
Jason Robert Juett*, University of Iowa
(109013334) 
3:00 p.m.
$\tau$Factorization in Commutative Rings with ZeroDivisors.
Christopher Park Mooney*, The University of Iowa
(10901389) 
3:30 p.m.
Generalized Integer Factorizations.
Alina Florescu*, The University of Iowa
(109013434)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.4:20 p.m.
Special Session on Computability and Complexity in Discrete and Continuous Worlds, IV
Room 290, Carver
Organizers:
Jack Lutz, Iowa State University
Tim McNicholl, Iowa State University mcnichol@iastate.edu

2:30 p.m.
Diagonally noncomputable functions and biimmunity.
Carl G. Jockusch*, University of Illinois at UrbanaChampaign
Andrew E. M. Lewis, University of Leeds
(109003156) 
3:00 p.m.
On the Space Complexity of the Graph Reachability Problem.
Vinodchandran N Variyam*, University of NebraskaLincoln
(109068394) 
3:30 p.m.
Strongly minimal theories with computable models.
Uri Andrews, University of WisconsinMadison
Julia F. Knight*, University of Notre Dame
(10900388) 
4:00 p.m.
Effective dimension in general metric spaces.
Elvira Mayordomo*, Universidad de Zaragoza, Spain
(109068171)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.4:20 p.m.
Special Session on Extremal Combinatorics, IV
Room 268, Carver
Organizers:
Steve Butler, Iowa State University
Ryan Martin, Iowa State University rymartin@iastate.edu

2:30 p.m.
Reversal Ratio and Linear Extension Diameter.
Graham Brightwell, London School of Economics and Political Science
Mitchel T. Keller*, University of NebraskaLincoln
(109006384) 
3:00 p.m.
Edgedisjoint rainbow spanning tees in complete graphs.
James M Carraher*, University of NebraskaLincoln
Stephen G Hartke, University of NebraskaLincoln
Paul Horn, Harvard University
(109005111) 
3:30 p.m.
Hypergraph Coloring with Hyperspectra.
Franklin H. J. Kenter*, University of California, San Diego
Michael Tait, University of California, San Diego
(109015332) 
4:00 p.m.
Sum list coloring, the sum choice number, and scgreedy graphs.
Michelle A Lastrina*, Dickinson College
Michael Young, Iowa State University
(109005284)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.4:20 p.m.
Special Session on Kinetic and Hydrodynamic PDEbased Descriptions of Multiscale Phenomena, IV
Room 160, Carver
Organizers:
James Evans, Iowa State University
Hailiang Liu, Iowa State University
Eitan Tadmor, University of Maryland tadmor@cscamm.umd.edu

2:30 p.m.
Inability of Continuum Theory to Evaluate the Elastic Energy of Alloys.
Peter Smereka*, Dept. of Mathematics, University of Michigan
Arvind Baskaran, Dept. of Mathematics, University of California, Irvine
Christian Ratsch, IPAM, University of California, Los Angeles
(10907494) 
3:30 p.m.
Gaussian Beam methods for the Helmholtz equation.
Hailiang Liu*, Iowa State University
(109035356)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.3:50 p.m.
Special Session on Numerical Analysis and Scientific Computing, IV
Room 150, Carver
Organizers:
Hailiang Liu, Iowa State University hliu@iastate.edu
Songting Luo, Iowa State University
James Rossmanith, Iowa State University
Jue Yan, Iowa State University

2:30 p.m.
Highorder asymptotic preserving discontinuous Galerkin schemes to discretevelocity kinetic equations in a diffusive regime.
Juhi Jang, UC Riverside
Fengyan Li, RPI
Jingmei Qiu*, University of Houston
Tao Xiong, University of Houston
(10906557) 
3:00 p.m.
Discontinuous Galerkin Constrained Transport Schemes for Ideal Magnetohydrodynamics in Multiple Dimensions.
James Rossmanith*, Iowa State University
(109065238) 
3:30 p.m.
On node distributions for interpolation and spectral methods.
Nguyen Hoang*, Department of Mathematics, The University of Oklahoma
(10906522)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.3:20 p.m.
Special Session on Operator Algebras and Topological Dynamics, IV
Room 4, Carver
Organizers:
Benton L. Duncan, North Dakota State University benton.duncan@ndsu.edu
Justin R. Peters, Iowa State University

2:30 p.m.
Fourier Series and Cantor Sets.
Eric Weber*, Iowa State University
Dorin Dutkay, University of Central Florida
Deguang Han, University of Central Florida
(109042309) 
3:00 p.m.
Quasinormal Toeplitz operators with matrixvalued rational symbols.
Raul E. Curto*, University of Iowa
(109047192)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.4:20 p.m.
Special Session on Partial Differential Equations, IV
Room 204, Carver
Organizers:
Gary Lieberman, Iowa State University
Paul Sacks, Iowa State University psacks@iastate.edu
Mahamadi Warma, University of Puerto Rico at Rio Piedras

2:30 p.m.
The Mean Value Theorem for Divergence Form Elliptic Operators.
Ivan Blank, Kansas State University
Zheng Hao*, Kansas State University
(10903570) 
3:00 p.m.
Solvability of linear local and nonlocal Robin problems over $C(\overline{\Omega})$.
Alejandro VelezSantiago*, University of Puerto Rico at Humacao
(109035146) 
3:30 p.m.
Error Estimates of the Bloch BandBased Gaussian Beam Superposition for the Schrödinger Equation.
Maksym Pryporov*, Iowa State University
Hailiang Liu, Iowa State University
(109035321) 
4:00 p.m.
Liouville Theorems for positive solutions in a cylinder for uniformly elliptic operators.
Lihe Wang*, The University of Iowa
(109035239)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.4:20 p.m.
Special Session on Probabilistic and Multiscale Modeling Approaches in Cell and Systems Biology, IV
Room 202, Carver
Organizers:
Jasmine Foo, University of Minnesota
Anastasios Matzavinos, Iowa State University tasos@iastate.edu

2:30 p.m.
Isolating intrinsic noise sources in a stochastic genetic switch.
Jay M Newby*, Mathematical Biosciences Institute, Ohio State University
(109092404) 
3:30 p.m.
Multiscale approximations in stochastic biochemical networks.
HyeWon Kang*, Mathematical Biosciences Institute, Ohio State University
(109092337)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.4:20 p.m.
Special Session on Quasigroups, Loops, and Nonassociative Division Algebras, IV
Room 68, Carver
Organizers:
C. E. Ealy, Jr., Western Michigan University clifton.e.ealy@wmich.edu
Benjamin Phillips, University of Michigan Dearborn
J. D. Phillips, Northern Michigan University
Petr Vojtechovsky, University of Denver

2:30 p.m.
On Computable loops: computable Paige loops and computable loops given by transversals in Fn, the free group on n generators.
Clifton E. Ealy Jr.*, Department of Mathematics, Western Michigan University
(109020410) 
3:00 p.m.
Special Majorana algebras and $3$transposition groups.
Jonathan I Hall*, Department of Mathematics, Michigan State University
(109020219) 
3:30 p.m.
A collection of algebras arising from a loop or a quasigroup.
Kenneth W Johnson*, Penn state Abington
(109020387) 
4:00 p.m.
Digroups and diquasigroups.
Jonathan D.H. Smith*, Iowa State University
(109020153)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.4:20 p.m.
Special Session on Stochastic Processes with Applications to Physics and Control, IV
Room 196, Carver
Organizers:
Jim Evans, Iowa State University evans@ameslab.gov
Arka Ghosh, Iowa State University
Jon Peterson, Purdue University
Alexander Roitershtein, Iowa State University

2:30 p.m.
Wave and droplet solutions for a spatial epidemic model exhibiting a discontinuous transition to an allhealthy state.
ChiJen Wang*, Ames LaboratoryUSDOE, Departments of Mathematics, Iowa State University
DaJiang Liu, Ames LaboratoryUSDOE
James W. Evans, Ames LaboratoryUSDOE, Departments of Mathematics and Physics & Astronomy, Iowa State University
(109060307) 
3:00 p.m.
Extraordinary variability and sharp transitions in a maximally frustrated dynamic network.
Wenjia Liu*, Department of Physics, Virginia Tech and Department of Physics and Astronomy, Iowa State University
Beate Schmittmann, Department of Physics, Virginia Tech and Department of Physics and Astronomy, Iowa State University
R. K. P. Zia, Department of Physics, Virginia Tech and Department of Physics and Astronomy, Iowa State University
(109060124) 
3:30 p.m.
Fluctuations and 1D decay during coarsening in 2D anisotropic systems.
Yong Han*, Department of Physics and Astronomy, Iowa State University
Selena M. Russell, Department of Chemistry, Iowa State Unversity
Patricia A. Thiel, Departments of Chemistry, and Materials Science & Engineering, Iowa State University; Ames Laboratory  USDOE
James W. Evans, Department of Physics and Astronomy, Iowa State University; Ames Laboratory  USDOE
(109060223) 
4:00 p.m.
Ontological models for quantum theory: some recent perspectives.
Raffaele Romano*, Iowa State University, Department of Mathematics
(10908107)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.4:20 p.m.
Special Session on Topology of 3Manifolds, IV
Room 294, Carver
Organizers:
Marion Campisi, University of Texas at Austin
Alexander Zupan, University of Texas at Austin zupan@math.utexas.edu

2:30 p.m.
Cutting Arcs and Band Surgeries in Fiber Surfaces.
Dorothy Buck, Imperial College London
Kai Ishihara, Yamaguchi University
Matt Rathbun*, Imperial College London
Koya Shimokawa, Saitama University
(109057179) 
3:00 p.m.
Cosmetic crossings and twisting operations in knots.
Cheryl Balm*, Michigan State University
Effie Kalfagianni, Michigan State University
(109057172) 
3:30 p.m.
How many hyperbolic 3manifolds can have the same volume?
Christian R. Millichap*, Temple University
(109057138) 
4:00 p.m.
Invariants for some everywhere wild knots.
Ollie Nanyes*, Bradley University
(109057181)

2:30 p.m.

Sunday April 28, 2013, 2:30 p.m.3:55 p.m.
Contributed Paper Session II
Room 124, Carver

2:30 p.m.
Graded Primary Submodules Over Multiplication Modules.
Malik Bataineh*, Jordan University of Science and Technology. Irbid  Jordan
Ala' Khazaaleh, Jordan University of Science and Technology. Irbid  Jordan
(109013150) 
2:45 p.m.
Embedded annuli and Jones' conjecture.
Douglas J LaFountain*, Western Illinois University
William W Menasco, University at Buffalo
(109057226) 
3:00 p.m.
Weighted Composition Operators between Weighted Bergman and $S^{p}$ Spaces.
Waleed K. AlRawashdeh*, Montana Tech
(109046158) 
3:15 p.m.
Resonant instability and nonlinear wave interactions in electrically forced jets.
Saulo Orizaga*, Iowa State University
Lisheng Hou, Iowa State University
Daniel N RIahi, University of Illinois Urbana Champaign, University of Texas PanAmerican
(109076439) 
3:30 p.m.
Exact Lie algebraic conditions for the indirect controllability of quantum mechanical systems.
Francesca Albertini, Dipartimento di Matematica Pura ed Applicata, Universita' di Padova, Italy
Domenico D'Alessandro*, Department of Mathematics, Iowa State University
Raffaele Romano, Department of Mathematics, Iowa State University
(109093421) 
3:45 p.m.
Geometric Figures as Sets of Parallel, Convergent and Divergent Plane Surfaces.
Stewart Ernest Brekke*, none
(10900042)

2:30 p.m.
Inquiries: meet@ams.org