AMS Sectional Meeting Program by Day
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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
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

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

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

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)

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)

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

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)

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)

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)

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)

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

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

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

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)

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

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)

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

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

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)

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

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

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)

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)

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)

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)

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)

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)

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

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)

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)

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

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)

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)

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)

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

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

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)

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)

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

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

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)

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

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)

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)

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

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

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)

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)

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)

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)

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)
Inquiries: meet@ams.org