AMS Sectional Meeting Full Program

Current as of Saturday, May 4, 2013 00:21:20

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Program  ·  Deadlines  ·  Abstract submission ·  Registration/Housing/Etc.
Special Event or Lecture  ·  Inquiries: meet@ams.org

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Spring Central Sectional Meeting
Iowa State University, Ames, IA
April 26-28, 2013 (Friday - Sunday)
Meeting #1090

Associate secretaries:

Georgia M. Benkart, AMS benkart@math.wisc.edu

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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 Wisconsin-Madison
  

  • 3:00 p.m.
    Small class association schemes obtained from cyclotomic classes.
    Kathleen Nowak, Iowa State University
    Sung Y Song*, Iowa State University
    (1090-05-408)
  • 3:30 p.m.
    Constructions of Strongly Regular Graphs.
    Elizabeth Lane-Harvard*, Colorado State University
    Tim Penttila, Colorado State University
    (1090-05-353)
  • 4:00 p.m.
    Association schemes and fast matrix multiplication.
    Jonathan D.H. Smith*, Iowa State University
    (1090-05-228)
  • 4:30 p.m.
    An infinite cardinal version of Gallai's Theorem for colorings of $\mathbb{R}^n$.
    Jeremy F Alm*, Illinois College
    (1090-05-229)
  • 5:00 p.m.
    Sets of Complex Unit Vectors and Distance-Regular Graphs.
    Junbo Huang*, University of Waterloo
    (1090-05-199)
• 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 Wisconsin-Madison
  

  • 8:00 a.m.
    The universal Askey-Wilson algebra.
    Paul M Terwilliger*, Math Department U. Wisconsin-Madison
    (1090-05-390)
  • 8:30 a.m.
    On Semisimple Varietal Terwilliger Algebras Whose Non-primary Ideals Are $1$-dimensional.
    Bangteng Xu*, Eastern Kentucky University
    Kezheng Kuo, Hubei Normal University
    (1090-05-21)
  • 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
    (1090-20-317)
  • 9:30 a.m.
    Subset bounds in association schemes and coherent configurations.
    Jason Williford*, University of Wyoming
    (1090-05-431)
  • 10:00 a.m.
    Cauchy Pairs and Cauchy Matrices.
    Alison Gordon Lynch*, University of Wisconsin-Madison
    (1090-15-413)
  • 10:30 a.m.
    Group schemes and fissions.
    Kenneth W Johnson*, , Penn State Abington
    (1090-05-320)
• 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
    (1090-30-283)
  • 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
    (1090-37-60)
  • 10:00 a.m.
    Meridians and the Carathéodory Topology.
    Mark David Comerford*, University of Rhode Island
    (1090-30-47)
  • 10:30 a.m.
    The fast escaping set of a quasiregular mapping.
    Alastair N Fletcher*, Northern Illinois University
    (1090-37-67)
• 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
    (1090-13-361)
  • 9:30 a.m.
    Ranks and decompositions of modules.
    Silvia Saccon*, University of Arizona
    (1090-13-386)
  • 10:00 a.m.
    Duality for Koszul homology over Gorenstein rings.
    Claudia Miller, Syracuse University
    Hamid Rahmati*, Miami University
    Janet Striuli, Fairfield University
    (1090-13-359)
  • 10:30 a.m.
    Local rings of embedding codepth 3.
    Lars Winther Christensen*, Texas Tech University
    Oana Veliche, Northeastern University
    (1090-13-276)
• 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, Pseudo-canonical Covers, and Gorenstein Homological Algebra.
    Pye Phyo Aung*, North Dakota State University
    (1090-18-09)
  • 8:30 a.m.
    A Homological Approach to Factorization.
    Jim Coykendall, North Dakota State University
    Brandon Goodell*, North Dakota State University
    (1090-13-319)
  • 9:00 a.m.
    Almost Dedekind domains and factorization.
    Richard Erwin Hasenauer*, Eureka College
    (1090-13-105)
  • 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
    (1090-13-304)
  • 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
    (1090-13-130)
• 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
    (1090-03-255)
  • 8:30 a.m.
    Complexity dichotomy theorems for counting problems.
    Jin-Yi Cai*, University of Wisconsin-Madison
    (1090-68-375)
  • 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
    (1090-68-382)
  • 9:30 a.m.
    Effectively closed sets and symbolic dynamics.
    Douglas Cenzer*, Department of Mathematics, University of Florida
    Sebastian Wyman, University of Florida
    (1090-03-206)
  • 10:00 a.m.
    Mutual Dimension.
    Adam Case*, Iowa State University
    Jack H. Lutz, Iowa State University
    (1090-68-345)
  • 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
    (1090-05-293)
• 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
    (1090-14-62)
  • 9:30 a.m.
    Generalized Humbert Schemes and Intersections of Humbert Surfaces.
    Ernst Kani*, Dept. of Math. & Stats, Queen's University, Kingston, Ontario
    (1090-14-280)
  • 10:30 a.m.
    Automorphisms Groups of p-gonal Riemann Surfaces.
    Mlagros Izquierdo*, Linköping University
    Antonio F Costa, UNED
    Gabriel Bartolini, Linköping University
    (1090-14-198)
• 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 Nebraska-Lincoln gavalos@math.unl.edu
  Scott Hansen, Iowa State University
  

  • 8:00 a.m.
    Wellposedness and Stability of a PDE Model Arising in a 3D Fluid-Structure Interaction.
    Thomas J Clark*, University of Nebraska - Lincoln
    George Avalos, University of Nebraska - Lincoln
    (1090-35-330)
  • 8:30 a.m.
    Persistency of Analyticity for Quasi-Linear Equations: An Energy-Like Approach.
    Yanqiu Guo*, Weizmann Institute of Science
    Edriss S. Titi, University of California, Irvine & The Weizmann Institute of Science
    (1090-35-178)
  • 9:00 a.m.
    Stabilization of voltage-actuated piezoelectric beams with magnetic effects.
    Ozkan Ozer*, Department of Applied Mathematics, University of Waterloo
    K. Morris, University of Waterloo
    (1090-93-120)
  • 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
    (1090-76-84)
  • 10:00 a.m.
    Linear stability of subsonic waves for the one-dimensional Benney-Luke equation.
    Milena Stanislavova*, University of Kansas
    (1090-35-92)
  • 10:30 a.m.
    Asymptotic Stabilization for Feedforward Systems with Delayed Feedbacks.
    Michael Malisoff*, LSU Department of Mathematics
    (1090-93-43)
• 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 Nebraska-Omaha
  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
    (1090-92-54)
  • 9:00 a.m.
    Statistics in Tree Space.
    Megan Owen*, University of Waterloo
    (1090-92-294)
  • 9:30 a.m.
    Characterizing Compatibility and Agreement of Phylogenetic Trees.
    David F Fernández-Baca*, Department of Computer Science, Iowa State University
    Sudheer R Vakati, Department of Computer Science, Iowa State University
    (1090-92-78)
  • 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
    (1090-92-306)
  • 10:30 a.m.
    Distance Geometry Optimization and Applications.
    Zhijun Wu*, Iowa State University
    (1090-92-195)
• 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
    (1090-05-217)
  • 9:00 a.m.
    Well-separable graphs with large bandwidth.
    Bela Csaba*, Bolyai Institute, University of Szeged
    (1090-05-338)
  • 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, Urbana-Champaign
    (1090-05-176)
  • 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 Urbana-Champaign
    B. Lidicky, University of Illinois at Urbana-Champaign
    M. Yancey, University of Illinois at Urbana-Champaign
    (1090-05-64)
  • 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
    (1090-05-285)
• 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.
    In-Jae Kim*, Minnesota State University
    (1090-15-113)
  • 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
    (1090-15-52)
  • 9:00 a.m.
    Sign patterns that require eventual exponential nonnegativity.
    Craig Erickson*, Department of Mathematics, Iowa State University
    (1090-15-110)
  • 9:30 a.m.
    The Essence of Nonnegativity for Matrices.
    Judi J McDonald*, Washington State University
    (1090-15-17)
  • 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
    (1090-15-134)
• 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 Ricci-flat Kahler metrics on resolutions of singularities.
    Bianca Santoro*, City College, CUNY
    (1090-53-366)
  • 9:00 a.m.
    Holomorphic functions on certain Kahler manifolds.
    Ovidiu Munteanu*, University of Connecticut
    (1090-58-68)
  • 10:00 a.m.
    Branch points of minimizing projective planes.
    Robert Gulliver*, University of Minnesota
    (1090-53-165)
• 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 Sub-Hypergraphs and the Characteristic Polynomial.
    Joshua N. Cooper, University of South Carolina
    Aaron M. Dutle*, University of South Carolina
    (1090-05-170)
  • 9:30 a.m.
    Winding up and down in meanders.
    V. Coll, Lehigh University
    C. Magnant, Georgia Southern University
    H. Wang*, Georgia Southern University
    (1090-05-45)
  • 10:00 a.m.
    Generating infinite random graphs.
    Csaba Biró*, University of Louisville
    Udayan B Darji, University of Louisville
    (1090-05-161)
  • 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
    (1090-05-40)
• Saturday April 27, 2013, 8:00 a.m.-10:50 a.m.
  Special Session on Kinetic and Hydrodynamic PDE-based Descriptions of Multi-scale 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
    (1090-70-273)
  • 9:00 a.m.
    Kinetic theory of gas-solid flow based on microscale simulation: a route towards describing multiscale phenomena.
    Shankar Subramaniam*, Department of Mechanical Engineering, Iowa State University
    (1090-76-252)
  • 10:00 a.m.
    From stochastic molecular-level reaction-diffusion models to conventional and generalized hydrodynamic reaction-diffusion equations.
    Jim W. Evans*, Iowa State University
    Da-Jiang Liu, Ames Laboratory - USDOE
    (1090-82-222)
• 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
    (1090-03-393)
  • 9:00 a.m.
    Degree Spectra of Theories.
    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 Miller, University of Wisconsin--Madison
    (1090-03-336)
  • 9:30 a.m.
    The Thin Set Theorem for Pairs implies DNR.
    Brian Rice*, University of Wisconsin - Madison
    (1090-03-300)
  • 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
    (1090-03-271)
  • 10:30 a.m.
    Some new weak representations of certain finite relation algebras.
    Richard L Kramer*, Iowa State University
    (1090-03-423)
• Saturday April 27, 2013, 8:00 a.m.-10:50 a.m.
  Special Session on Multi-Dimensional Dynamical Systems, I
  Room 190, Carver
  Organizers:
  Jayadev Athreya, University of Illinois, Urbana-Champaign jathreya@illinois.edu
  Jonathan Chaika, University of Chicago
  Joseph Rosenblatt, University of Illinois at Urbana-Champaign
  

  • 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 Urbana-Champaign
    Ayse A Sahin*, DePaul University
    (1090-37-367)
  • 10:30 a.m.
    Ledrappier's example and some open problems in algebraic $\mathbb{Z}^d$ dynamics.
    Bruce Kitchens*, Indiana University Purdue University - Indianapolis
    (1090-37-207)
• 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
    (1090-65-205)
  • 8:30 a.m.
    Mean-Field Description of Ionic Size Effects with Non-Uniform Ionic Sizes: A Numerical Approach.
    S. Zhou, UCSD
    Z. Wang*, Florida International University
    B. Li, UCSD
    (1090-65-251)
  • 9:00 a.m.
    Finite Element Method for Poroelasticity Models of Soft Matters and Soil Mechanics.
    Xiaobing H. Feng*, The University of Tennessee
    (1090-65-202)
  • 9:30 a.m.
    Dissection of Boussinesq non-linear interactions using intermediate models.
    Gerardo Hernandez-Duenas*, University of Wisconsin
    Leslie M Smith, University of Wisconsin
    Samuel N Stechmann, University of Wisconsin
    (1090-76-363)
  • 10:00 a.m.
    The entropy satisfying discontinuous Galerkin methods for Fokker-Planck equations.
    Hailiang Liu, Iowa State University
    Hui Yu*, Iowa State University
    (1090-35-327)
  • 10:30 a.m.
    Inverse Surface Scattering in Near-Field Imaging.
    Gang Bao, Zhejiang University and Michigan State University
    Peijun Li*, Purdue University
    (1090-78-250)
• 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
    (1090-65-203)
  • 8:30 a.m.
    Geometric optimization of Dirichlet-Laplacian eigenvalues.
    Braxton Osting, UCLA
    Chiu-Yen Kao*, Claremont McKenna College
    (1090-65-282)
  • 9:00 a.m.
    Pseudo transient continuation and time marching methods for Monge-Ampère type equation.
    Gerard Awanou*, University of Illinois at Chicago
    (1090-65-135)
  • 9:30 a.m.
    Finite element methods for the fully nonlinear Monge-Ampère equation.
    Michael J. Neilan*, University of Pittsburgh
    (1090-65-159)
  • 10:00 a.m.
    A Finite Elements Method for Total Variation Minimization.
    Leopold Matamba Messi*, The Ohio State University
    Ming-jun Lai, The University of Georgia
    (1090-65-296)
  • 10:30 a.m.
    Alternating Evolution Discontinuous Galerkin methods for Hamilton-Jacobi Equations.
    Michael Pollack*, Iowa State University
    (1090-65-313)
• 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 Nebraska-Lincoln
    David Milan, University of Texas-Tyler
    (1090-46-174)
  • 8:30 a.m.
    C*-dynamical systems and Operator Algebras.
    Evgenios Kakariadis*, University of Waterloo
    (1090-47-201)
  • 9:30 a.m.
    Piecewise conjugacy as an isomorphism invariant for operator algebras.
    Elias G Katsoulis*, East Carolina University & University of Athens
    (1090-47-144)
  • 10:30 a.m.
    On Individual Ergodic Theorems in Non-commutative $L^p$-spaces for $p1$.
    Semyon N. Litvinov*, Pennsylvania State University Hazleton
    (1090-47-27)
• 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
    (1090-35-140)
  • 8:30 a.m.
    Mixed boundary value problems for quasilinear elliptic equations.
    Chunquan Tang*, Iowa State University
    Gary M. Lieberman, Iowa State University
    (1090-35-287)
  • 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 Nebraska-Lincoln
    (1090-35-278)
  • 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
    (1090-35-270)
  • 10:00 a.m.
    The Obstacle Problem for Divergence Form Elliptic Operators.
    Ivan Blank*, Kansas State University
    Zheng Hao, Kansas State University
    (1090-35-71)
  • 10:30 a.m.
    Semi-linear elliptic and elliptic-parabolic 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
    (1090-35-50)
• 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
    (1090-92-351)
  • 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
    (1090-60-154)
  • 10:00 a.m.
    Identifiability & Parameter Estimation for Modeling Human Disease.
    Marisa C Eisenberg*, Departments of Epidemiology and Mathematics, University of Michigan, Ann Arbor
    (1090-93-419)
• 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.
    K-Loops from G, G a subgroup of GL(H) for H a separable Hilbert space.
    Alper Bulut*, Department of Mathematics, Western Michigan University
    (1090-20-197)
  • 9:30 a.m.
    A case for new associators.
    David Stanovský, Charles University in Prague
    Petr Vojtěchovský*, University of Denver
    (1090-20-243)
  • 10:00 a.m.
    Zorn vector matrices over $\mathbb{Z}/p^k\mathbb{Z}$.
    Andrew T Wells*, East Central University
    (1090-17-298)
  • 10:30 a.m.
    Beyond complex number exponentiation: Two prototype algebras.
    Jens Köplinger*, Greensboro NC 27403
    (1090-17-116)
• 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 López-Permouth*, Ohio University
    (1090-16-211)
  • 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
    (1090-16-61)
  • 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
    (1090-16-260)
  • 9:30 a.m.
    On Baer Module Hulls.
    Jae Keol Park, Pusan National University
    Syed Tariq Rizvi*, The Ohio State University
    (1090-16-191)
  • 10:00 a.m.
    Associated primes of induced modules over semigroup-graded rings.
    Allen D. Bell*, University of Wisconsin-Milwaukee
    (1090-16-326)
  • 10:30 a.m.
    Almost Self-Injective 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
    (1090-16-115)
• 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 Rassoul-Agha, University of Utah
    Timo Seppalainen, University of Wisconsin-Madison
    Atilla Yilmaz, Bogazici University
    (1090-60-136)
  • 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
    (1090-60-12)
  • 9:00 a.m.
    Geodesics in first-passage percolation.
    Antonio Auffinger*, University of Chicago
    (1090-60-75)
  • 9:30 a.m.
    Diffusion with Redistribution.
    Iddo Ben-Ari*, University of Connecticut
    (1090-60-175)
  • 10:00 a.m.
    Large deviations for random walks in a random environment on a strip.
    Jonathon Peterson*, Purdue University
    (1090-60-73)
  • 10:30 a.m.
    Generalized hydrodynamic treatment of the interplay between single-file 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
    (1090-60-234)
• Saturday April 27, 2013, 8:00 a.m.-10:50 a.m.
  Special Session on Topology of 3-Manifolds, 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
    (1090-57-72)
  • 8:30 a.m.
    Seifert surfaces for split links and links in $\mathbb{R}^3$.
    Jessica E. Banks*, CRM-ISM, Montreal
    (1090-57-262)
  • 9:00 a.m.
    Klein bottles and tori properly embedded in a knot exterior.
    Mario Eudave-Muñoz*, Instituto de Matematicas, UNAM
    Enrique Ramirez-Losada, CIMAT
    (1090-57-348)
  • 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
    (1090-57-438)
  • 10:00 a.m.
    Normalizing Topologically Minimal surfaces.
    David C Bachman*, Pitzer College
    (1090-57-74)
  • 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
    (1090-57-305)
• 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
    (1090-15-242)
  • 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
    (1090-15-269)
  • 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
    (1090-15-166)
  • 9:30 a.m.
    Bounds on maximum nullity.
    Jason Grout*, Drake University
    Steve Butler, Iowa State University
    Tracy Hall, Novatek
    (1090-15-240)
• 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 self-organized dynamics.
  Room 1, Carver
  Eitan Tadmor*, University of Maryland
  Sebastien Motsch, University of Maryland
  Changhui Tan, University of Maryland
  (1090-70-04)
• 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 Wisconsin-Madison
  

  • 2:45 p.m.
    Triangle-free Strongly Regular Graphs: From Dale Mesner to a Modern Understanding.
    M. Klin, Ben-Gurion University of the Negev, Israel
    A Woldar*, Villanova University
    M Ziv-Av, Ben-Gurion University of the Negev, Israel
    (1090-05-329)
  • 3:15 p.m.
    Coxeter Table Algebras.
    Andrew P. Wang*, Northern Illinois University
    (1090-20-312)
  • 3:45 p.m.
    $1\frac12$-designs and $1\frac12$-difference sets.
    Oktay Olmez*, Iowa State University
    (1090-05-231)
  • 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
    (1090-51-51)
  • 4:45 p.m.
    Connections between $U_q(\mathfrak{sl}_2)$ and tridiagonal pairs.
    Sarah R. Bockting-Conrad*, University of Wisconsin - Madison
    (1090-05-411)
  • 5:15 p.m.
    Geometry of numbers and sumsets.
    Jaewoo Lee*, The City University of New York - Borough of Manhattan Community College
    (1090-05-31)
• 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
    (1090-58-98)
  • 3:15 p.m.
    (w1,w2)-tempered ultra distributions representation theorems.
    Hamed Mohd Obiedat*, The Hashemite University
    (1090-46-235)
  • 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
    (1090-31-258)
  • 4:15 p.m.
    Generalization of Conformally Natural Extension.
    Oleg Muzician*, CUNY-BMCC
    Jun Hu, CUNY Graduate Center, CUNY Brooklyn College
    (1090-30-119)
  • 4:45 p.m.
    Linear slices close to a Maskit slice.
    Kentaro Ito*, Nagoya University
    (1090-57-193)
• 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
    (1090-13-389)
  • 3:45 p.m.
    Chern character for matrix factorization via Chern-Weil.
    Xuan Yu*, University of Nebraska-Lincoln
    (1090-16-209)
  • 4:15 p.m.
    Regularity of general rational curves on hypersurfaces.
    Sara Gharahbeigi*, University of Missouri, Columbia
    (1090-14-383)
  • 4:45 p.m.
    Semidualizing Modules Over Rings of invariants.
    William Thomas Sanders*, University of Kansas
    (1090-13-427)
  • 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
    (1090-16-364)
• 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
    (1090-13-118)
  • 3:15 p.m.
    The cases for and against loops in the zero-divisor graphs of commutative rings.
    Shane P Redmond*, Eastern Kentucky University
    (1090-13-259)
  • 3:45 p.m.
    Counting walks on zero-divisor graphs of finite reduced rings.
    John D. LaGrange*, Lindsey Wilson College
    (1090-13-24)
  • 4:15 p.m.
    Realizing zero-divisor graphs of posets.
    John D. LaGrange, Lindsey Wilson College
    Kyle A. Roy*, Miami University
    (1090-06-30)
  • 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, Chung-Ang University
    (1090-13-210)
  • 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 Picavet-L'Hermitte, Universite Blaise Pascal
    (1090-13-261)
• 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 Urbana-Champaign
    (1090-03-225)
  • 3:15 p.m.
    Strengthening the Link between Complexity Classes and Kolmogorov Complexity.
    Eric Allender*, Rutgers University
    (1090-68-370)
  • 3:45 p.m.
    Complexity of orders on residually nilpotent groups.
    Valentina Harizanov*, The George Washington University
    (1090-03-275)
  • 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
    (1090-03-347)
  • 4:45 p.m.
    What does randomness mean for betting strategies?
    Sam Buss, UC San Diego
    Mia Minnes*, UC San Diego
    (1090-03-28)
  • 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
    (1090-03-108)
• 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
    (1090-14-416)
  • 3:15 p.m.
    Computing branching data and decomposing Jacobian varieties.
    Jennifer Paulhus*, Grinnell College
    (1090-14-373)
  • 4:15 p.m.
    The Batalin-Vilkovisky Formalism and Cohomology of Moduli Spaces.
    Domenico D'Alessandro, Iowa State University
    Alexander A Voronov*, University of Minnesota
    (1090-14-352)
  • 4:45 p.m.
    Extension theorems for vector bundles.
    Ravindra Girivaru*, University of Missouri -- St. Louis
    Amit Tripathi, Indian Statistical Institute Bangalore
    (1090-14-402)
  • 5:15 p.m.
    Reciprocity Laws on Algebraic Surfaces via Iterated Integrals.
    Ivan Horozov*, Washington Univetsity in St. Louis
    (1090-14-127)
• 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 Nebraska-Lincoln 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
    (1090-93-13)
  • 3:15 p.m.
    Hamiltonian-Krein instability index and applications.
    Atanas Stefanov*, University of Kansas
    Todd Kapitula, Calvin College
    (1090-37-81)
  • 3:45 p.m.
    The Evans function and the Weyl-Titchmarsh function.
    Yuri Latushkin, University of Missouri-Columbia
    Alim Sukhtayev*, Texas A&M University
    (1090-35-241)
  • 4:15 p.m.
    Blow-Up 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
    (1090-35-236)
  • 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
    (1090-93-428)
  • 5:15 p.m.
    A general approach to the boundary controllability of hyperbolic systems.
    Matthias Eller*, Department of Mathematics, Georgetown University
    (1090-35-289)
• 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 Nebraska-Omaha
  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
    (1090-37-59)
  • 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
    (1090-28-145)
  • 3:45 p.m.
    Data characterization and identification for network inference.
    Elena S Dimitrova*, Clemson University
    (1090-14-23)
  • 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
    (1090-92-378)
  • 4:45 p.m.
    The Power of Two: The Impact of Combining Methods in Reverse Engineering Gene Networks.
    Brandilyn Stigler*, Southern Methodist University
    (1090-92-417)
• 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 3-regular eulerian digraphs.
    James Carraher, University of Nebraska-Lincoln
    Stephen G. Hartke*, University of Nebraska-Lincoln
    (1090-05-397)
  • 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
    (1090-05-350)
  • 4:45 p.m.
    Computing with voting trees.
    Jennifer Iglesias, Carnegie Mellon University
    Nathaniel Ince, Carnegie Mellon University
    Po-Shen Loh*, Carnegie Mellon University
    (1090-05-190)
  • 5:15 p.m.
    Graphs of given maximum degree with the most cliques.
    Jonathan Cutler, Montclair State University
    A J Radcliffe*, University of Nebraska-Lincoln
    (1090-05-187)
• 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
    (1090-15-112)
  • 3:15 p.m.
    Computations with some classes of matrices related to P-matrices.
    Juan M. Pena*, Universidad de Zaragoza
    (1090-15-97)
  • 3:45 p.m.
    Variation-diminishing properties and bidiagonal decompositions of eigenvector matrices of totally positive matrices.
    Plamen S Koev*, San Jose State University
    (1090-15-83)
  • 4:15 p.m.
    Inequalities on Totally Nonnegative Matrices.
    Shahla Nasserasr*, University of Regina
    (1090-15-106)
  • 4:45 p.m.
    Eventual total positivity and related properties.
    Olga Y. Kushel*, TU Berlin
    (1090-47-107)
• 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
    (1090-53-379)
  • 3:45 p.m.
    A Discrete Yamabe Problem.
    Andrea N Young*, Ripon College
    (1090-52-297)
  • 4:45 p.m.
    The Curvature Estimate Of Higher Codimensional Mean Curvature Flow.
    Mao-Pei Tsui*, Department of Mathematics and Statistics, University of Toledo
    (1090-53-148)
• 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 monomer-dimer conjecture(LAMC) was proved and Lu-Mohr-Szekely was disproved.
    Leonid Gurvits*, The City College of New York
    (1090-05-104)
  • 3:45 p.m.
    Minimum vertex degree threshold for loose Hamilton cycles in 3-graphs.
    Jie Han, Georgia State University
    Yi Zhao*, Georgia State University
    (1090-05-129)
  • 4:15 p.m.
    Coloring claw-free graphs with $\Delta-1$ colors.
    Daniel W. Cranston*, Virginia Commonwealth University
    Landon Rabern, Arizona State University
    (1090-05-44)
  • 4:45 p.m.
    Counting colorings of a regular graph.
    David Galvin*, Department of Mathematics, University of Notre Dame
    (1090-05-63)
  • 5:15 p.m.
    The list version of Borodin-Kostochka Conjecture for graphs with large maximum degree.
    Ilkyoo Choi*, University of Illinois at Urbana-Champaign
    Henry A Kierstead, Arizona State University
    Landon Rabern, Arizona State University
    Bruce Reed, McGill University
    (1090-05-82)
• Saturday April 27, 2013, 2:45 p.m.-5:35 p.m.
  Special Session on Kinetic and Hydrodynamic PDE-based Descriptions of Multi-scale 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
    (1090-76-177)
  • 3:15 p.m.
    Hydrodynamic limit of granular gases to pressureless Euler in dimension 1.
    Pierre-Emmanuel Jabin*, University of Maryland
    (1090-35-184)
  • 4:15 p.m.
    Fokker-Planck 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
    (1090-35-365)
  • 4:45 p.m.
    Global Dynamics of Chemotaxis Models.
    Tong Li*, Depatment of Mathematics, University of Iowa, Iowa City, IA 52242
    (1090-35-372)
• 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
    (1090-03-132)
  • 3:15 p.m.
    Computability Theory and Learning Theory.
    Achilles Athanasios Beros*, University of Wisconsin -- Madison
    (1090-03-249)
  • 3:45 p.m.
    The $\Sigma_1^1$-completeness of the Decomposability of Torsion-Free Abelian Groups.
    Kyle Riggs*, Indiana University
    (1090-03-183)
  • 4:15 p.m.
    Recursively presenting models of Solovay theories.
    Uri Andrews*, University of Wisconsin--Madison
    Mingzhong Cai, University of Wisconsin--Madison
    David Diamondstone, University of Wisconsin--Madison
    Joseph S Miller, University of Wisconsin--Madison
    Steffen Lempp, University of Wisconsin--Madison
    (1090-03-173)
  • 4:45 p.m.
    Boolean Semilattices.
    Clifford Bergman*, Iowa State University
    (1090-06-46)
• Saturday April 27, 2013, 2:45 p.m.-5:05 p.m.
  Special Session on Multi-Dimensional Dynamical Systems, II
  Room 190, Carver
  Organizers:
  Jayadev Athreya, University of Illinois, Urbana-Champaign jathreya@illinois.edu
  Jonathan Chaika, University of Chicago
  Joseph Rosenblatt, University of Illinois at Urbana-Champaign
  

  • 2:45 p.m.
    Some Results on Affine Manifolds in Genus 3 with a Zero Lyapunov Exponent.
    David Aulicino*, University of Chicago
    (1090-37-344)
  • 3:15 p.m.
    Discussion
  • 3:45 p.m.
    SL(2,R) orbit closures of translation surfaces.
    Alex Wright*, University of Chicago
    (1090-37-277)
  • 4:15 p.m.
    Patterson-Sullivan Theory and Orbit Counting for Subgroups of Mapping Class Groups.
    Ilya Gekhtman*, University of Chicago
    (1090-37-368)
  • 4:45 p.m.
    Exponential decay of multiple mixing integrals of {\em SL} $(n)$ actions.
    Ioannis Konstantoulas*, University of Illinois at Urbana-Champaign
    (1090-37-355)
• 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
    (1090-65-139)
  • 3:15 p.m.
    High-order multiderivative integrators for hyperbolic conservation laws.
    David C Seal*, Michigan State University
    Yaman Guclu, Michigan State University
    Andrew Christlieb, Michigan State University
    (1090-65-433)
  • 3:45 p.m.
    Energy conserving schemes for Vlasov-Ampere and Vlasov-Maxwell system.
    Yingda Cheng*, Michigan State University
    Andrew Christlieb, Michigan State University
    Xinghui Zhong, Michigan State University
    (1090-65-405)
  • 4:15 p.m.
    Maximum-principle-satisfying high order Direct discontinuous Galerkin method for convection diffusion equations.
    Jue Yan*, Iowa State University
    (1090-65-133)
  • 4:45 p.m.
    Resolution of source singularities for the point-source eikonal equations with systematic factorization approach.
    Songting Luo*, Iowa State University
    (1090-65-342)
  • 5:15 p.m.
    Data-driven tight frame construction and image denoising.
    Jian-Feng Cai*, University of Iowa
    Sibin Huang, National University of Singapore
    Hui Ji, National University of Singapore
    Zuowei Shen, National University of Singapore
    Gui-Bo Ye, University of Iowa
    (1090-65-418)
• 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
    (1090-35-220)
  • 3:15 p.m.
    An Inverse Random Source Scattering Problem.
    Peijun Li*, Purdue University
    (1090-78-256)
  • 3:45 p.m.
    Compact embedding in the space of piecewise $H^1$ functions.
    Sheng Zhang*, Wayne State University
    (1090-65-302)
  • 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
    (1090-51-436)
  • 4:45 p.m.
    Generalized Finite Element Method for Elliptic Equations with Essential Boundary Conditions.
    Nicolae Tarfulea*, Purdue University Calumet
    (1090-65-401)
• 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
    (1090-16-212)
  • 3:15 p.m.
    Infinite products.
    Palle E T Jorgensen*, University of Iowa
    (1090-47-49)
  • 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
    (1090-47-141)
  • 5:15 p.m.
    Tensor Algebras, Intertwiners and Taylor's Taylor Series.
    Paul S. Muhly*, University of Iowa
    Baruch Solel, Technion
    (1090-47-142)
• 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
    (1090-35-37)
  • 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
    (1090-35-38)
  • 3:45 p.m.
    Regular Solutions for Wave Equations with Supercritical Sources and Exponential-to-Logarithmic Damping.
    Lorena Bociu*, NC State University
    Petronela Radu, University of Nebraska-Lincoln
    Daniel Toundykov, University of Nebraska-Lincoln
    (1090-35-208)
  • 4:15 p.m.
    Global Muckenhoupt-Wheeden type bounds on Reifenberg flat domains, with applications to quasilinear Riccati type equations.
    Phuc Cong Nguyen*, Louisiana State University
    (1090-35-100)
  • 4:45 p.m.
    Vanishing of Long-Time Average Viscosity for SQG Equations.
    Andrei Tarfulea*, Princeton University
    (1090-35-123)
  • 5:15 p.m.
    Liquid bridges between balls: the small volume instability.
    Thomas I Vogel*, Texas A&M University
    (1090-76-87)
• 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 substitution-only model of sequence evolution.
    Sebastien Roch*, University of Wisconsin-Madison
    (1090-60-331)
  • 3:45 p.m.
    Model development and computational methods for biochemical reaction networks with stochastic dynamics.
    David F. Anderson*, University of Wisconsin - Madison
    (1090-60-303)
  • 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
    (1090-60-143)
• 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
    (1090-20-399)
  • 3:45 p.m.
    One-sided inner mapping groups and multiplication groups of Cayley-Dickson loops.
    Jenya Kirshtein*, University of Denver
    (1090-20-426)
  • 4:15 p.m.
    The existence problem for strong complete mappings.
    Anthony B. Evans*, Wright State University
    (1090-20-34)
  • 4:45 p.m.
    Construction of minimally nonassociative Moufang loops of odd order.
    Andrew Rajah*, Universiti Sains Malaysia, Penang, Malaysia
    (1090-20-371)
  • 5:15 p.m.
    The structure of conjugacy closed loops.
    J.D. Phillips*, Northern Michigan University
    (1090-20-32)
• 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 Huisgen-Zimmermann, UC Santa Barbara
    (1090-16-253)
  • 3:15 p.m.
    FRT-Bialgebras and Quantum Schubert Cells.
    Garrett Johnson*, The Catholic University of America
    Christopher Nowlin, Elkridge, MD
    (1090-17-360)
  • 3:45 p.m.
    PBW deformations of Artin-Schelter regular algebras.
    Jason Gaddis*, University of Wisconsin - Milwaukee
    (1090-16-18)
  • 4:15 p.m.
    Do universal deformation rings recognize fusion?
    David C Meyer*, University of Iowa
    (1090-20-263)
  • 4:45 p.m.
    A Divided Difference Operator for the Hessenberg Representation.
    Nicholas Teff*, University of Iowa
    (1090-20-362)
  • 5:15 p.m.
    Cellular bases in towers of cellular algebras.
    Frederick Goodman*, University of Iowa
    (1090-16-409)
• 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
    (1090-60-233)
  • 3:15 p.m.
    Nonequilibrium First-Order Transition in the Quadratic Contact Process or Schloegl's second Model.
    Da-Jiang Liu*, Ames Laboratory (USDOE)
    Chi-Jen Wang, Iowa State University
    J. W. Evans, Ames Laboratory and Iowa State University
    (1090-60-314)
  • 3:45 p.m.
    Inhomogeneous Tilings of the Aztec Diamond.
    Gregory Shinault*, University of Wisconsin-Madison
    (1090-60-85)
  • 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
    (1090-60-164)
  • 4:45 p.m.
    Tuning the kinetics of cell-cell adhesion.
    Sanjeevi Sivasankar*, Iowa State University
    Kristine Manibog, Iowa State University
    Sabyasachi Rakshit, Iowa State University
    Hui Li, Iowa State University
    (1090-92-333)
  • 5:15 p.m.
    Modeling evaporation & phase-separation in thin film evaporation: Cahn-Hilliard-Cook equations, adaptive time-stepping and Linear stability analysis.
    Baskar Ganapathysubramanian*, Iowa State University
    (1090-35-437)
• Saturday April 27, 2013, 2:45 p.m.-5:35 p.m.
  Special Session on Topology of 3-Manifolds, 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 3-manifolds.
    Yo'av Rieck*, University of Arkansas
    Yasuahi Yamashita, Nara Women's University
    (1090-57-291)
  • 3:15 p.m.
    Current Progress on the Two Summands Conjecture.
    Nicholas T Zufelt*, University of Texas at Austin
    (1090-57-295)
  • 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
    (1090-57-160)
  • 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
    (1090-57-398)
  • 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
    (1090-57-288)
  • 5:15 p.m.
    Dehn surgery and bridge number of knots in handlebodies.
    R Sean Bowman*, Oklahoma State University
    (1090-57-216)
• 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
    (1090-15-424)
  • 3:15 p.m.
    Maximum Nullity and Zero Forcing Number of Subdivided Graphs.
    Michael Young*, Iowa State University
    (1090-05-335)
  • 3:45 p.m.
    Minimum rank for circulant graphs and bipartite circulant graphs.
    Seth A Meyer*, Saint Norbert College
    (1090-05-218)
  • 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
    (1090-15-186)
  • 4:45 p.m.
    Zero Forcing Leads to Iteration and Domination.
    Nathaniel Dean*, Texas State University
    (1090-05-279)
  • 5:15 p.m.
    Positive Semidefinite Propagation Time.
    Nathan J Warnberg*, Iowa State University
    (1090-15-69)
• Saturday April 27, 2013, 5:45 p.m.-6:35 p.m.
  Invited Address
  Virtual classification of 3-manifolds.
  Room 1, Carver
  Vladimir Markovic*, California Institute of Technology
  (1090-51-03)

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 Wisconsin-Madison
  

  • 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
    (1090-20-147)
  • 8:30 a.m.
    The Tail Condition for Leonard Pairs.
    Edward D. Hanson*, University of Wisconsin-Madison
    (1090-05-407)
  • 9:00 a.m.
    Nonexistence of certain abstract hyperovals of order 12.
    Benjamin C Cooper*, Department of Mathematics, Colorado State University
    (1090-05-308)
  • 9:30 a.m.
    Non-commutative association schemes of rank $6$.
    Paul-Hermann Zieschang*, Department of Mathematics, University of Texas at Brownsville
    (1090-20-65)
  • 10:00 a.m.
    $Q$-polynomial distance-regular graphs and the double affine Hecke algebra of rank one.
    Jae-Ho Lee*, University of Wisconsin-Madison
    (1090-33-93)
  • 10:30 a.m.
    Spreads and Packings in PG$(3,q)$.
    Anton Betten*, Colorado State University
    (1090-05-114)
• 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
    (1090-37-48)
  • 9:30 a.m.
    Projective structures on closed surfaces and the geometry of diffeomorphisms.
    Ferry Henrik Kwakkel*, University of Sao Paulo, Sao Paulo, Brazil
    (1090-51-343)
  • 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
    (1090-30-232)
  • 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
    (1090-30-194)
• 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 Nebraska-Lincoln
    (1090-14-245)
  • 9:00 a.m.
    Codualizing Modules And Complexes.
    Sean Sather-Wagstaff, North Dakota State University
    Richard Wicklein*, North Dakota State University
    (1090-13-323)
  • 9:30 a.m.
    Periodic modules over Gorenstein local rings.
    Amanda Croll*, University of Nebraska-Lincoln
    (1090-13-301)
  • 10:00 a.m.
    Cohen factorizations and applications.
    Saeed Nasseh*, North Dakota State University
    Sean Sather-Wagstaff, North Dakota State University
    (1090-13-340)
  • 10:30 a.m.
    $F$-pure thresholds of quasi-homogeneous polynomials.
    Daniel Heranadez, University of Minnesota
    Luis Nunez-Betancourt, University of Michigan
    Emily Witt, University of Minnesota
    Wenliang Zhang*, University of Nebraska
    (1090-13-374)
• 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 Multiset-Complete Krull Monoids.
    Paul Baginski*, Smith College
    George J Schaeffer, University of California, Los Angeles
    (1090-13-395)
  • 8:30 a.m.
    Multiplicative Subsets of Atoms.
    Ashley Rand*, University of Tennessee, Knoxville
    (1090-13-316)
  • 9:00 a.m.
    Prüfer domains and the projective line.
    Bruce Olberding*, New Mexico State University
    (1090-13-196)
  • 9:30 a.m.
    Localizing Global Properties to Individual Maximal Ideals.
    Thomas G Lucas*, Department of Mathematics & Statistics, University of North Carolina Charlotte
    (1090-13-324)
  • 10:00 a.m.
    Some near-Noetherian conditions.
    Jim Coykendall*, North Dakota State University
    Tridib Dutta, University of Pittsburgh
    (1090-13-272)
  • 10:30 a.m.
    Ascent properties for derived functors.
    Sean Sather-Wagstaff*, North Dakota State University
    (1090-13-95)
• 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
    (1090-03-56)
  • 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 Friedrich-Schiller-Universität Jena
    (1090-68-385)
  • 9:00 a.m.
    Polynomial-Time Randomness and Differentiability.
    John M. Hitchcock*, University of Wyoming
    Joshua C. Sanderlin, University of Wyoming
    (1090-68-414)
  • 9:30 a.m.
    On the Computable Curves.
    Xizhong Zheng*, Arcadia University
    (1090-03-149)
  • 10:00 a.m.
    Complexity and Symmetry.
    Lek-Heng Lim*, University of Chicago
    Ke Ye, University of Chicago
    (1090-15-267)
  • 10:30 a.m.
    Strong separations and Kolmogorov complexity.
    W.M. Phillip Hudelson*, Pennsylvania State University
    (1090-03-91)
• 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
    (1090-03-128)
  • 10:00 a.m.
    Lifting techniques for polynomial systems.
    Eric Schost*, Western University
    (1090-68-429)
  • 10:30 a.m.
    Heterotic/F-theory duality and lattice polarized K3 surfaces.
    Andreas Malmendier*, Colby College
    Ken Ono, Emory University
    (1090-14-376)
• 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 Nebraska-Lincoln 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 Nebraska-Lincoln
    (1090-35-227)
  • 8:30 a.m.
    Explicit Approximations of Bilinear Controls using Interpolation.
    Katherine A. Kime*, University of Nebraska Kearney
    (1090-93-80)
  • 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
    (1090-35-167)
  • 9:30 a.m.
    Exact null-controllability of heat equation with singular specific heat.
    Scott Hansen*, Iowa State University
    Jose de Jesus Martinez, Iowa State University
    (1090-93-266)
• 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 Nebraska-Omaha
  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 Nebraska-Lincoln
    (1090-92-315)
  • 9:00 a.m.
    Encoding simplicial complexes by neural networks.
    Vladimir Itskov*, University of Nebraska-Lincoln
    Carina Curto, University of Nebraska-Lincoln
    Chad Giusti, University of Nebraska-Lincoln
    (1090-92-163)
  • 9:30 a.m.
    Reverse Engineering of Regulatory Networks Using Algebraic Geometry.
    Alan Veliz-Cuba*, University of Nebraska-Lincoln
    (1090-92-05)
  • 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
    (1090-92-151)
  • 10:30 a.m.
    Discussion
• 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
    (1090-05-55)
  • 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
    (1090-05-381)
  • 10:00 a.m.
    Turán Problems on Non-uniform Hypergraphs.
    Linyuan Lu*, University of South Carolina
    Travis Johnston, University of South Carolina
    (1090-05-420)
  • 10:30 a.m.
    Tree-width 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
    (1090-05-125)
• 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.
    Chi-Kwong Li*, Department of Mathematics, College of William and Mary
    (1090-15-77)
  • 8:30 a.m.
    On the Structure of the Set of Symmetric Matrices with the Perron-Frobenius Property.
    Pablo Tarazaga*, Texas A&M University, Corpus Christi
    (1090-15-230)
  • 9:00 a.m.
    Discussion
• 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
    (1090-53-237)
  • 9:00 a.m.
    Rigidity of Self-similar Solutions of Geometric Flows.
    Lu Wang*, Johns Hopkins University
    (1090-53-403)
  • 10:00 a.m.
    The Zoo of Solitons for Curve Shortening in $\mathbb{R}^n$.
    Sigurd B Angenent*, Math Department, UW Madison
    (1090-35-396)
• 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
    (1090-05-281)
  • 9:00 a.m.
    Bijective proofs of Jensen's identity and Mohanty-Handa'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
    (1090-05-103)
  • 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
    (1090-05-121)
  • 10:00 a.m.
    2-colorability of hypergraphs using commutative algebra.
    L. Thoma*, Department of Mathematics, University of Rhode Island
    (1090-05-33)
  • 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
    (1090-05-19)
• Sunday April 28, 2013, 8:00 a.m.-10:50 a.m.
  Special Session on Kinetic and Hydrodynamic PDE-based Descriptions of Multi-scale 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
    (1090-35-430)
  • 9:00 a.m.
    A class of nonlocal conservation laws: local wellposedness and sub-thresholds for finite time shock formation.
    Yongki Lee*, Department of Mathematics, Iowa State University
    Hailiang Liu, Department of Mathematics, Iowa State University
    (1090-35-286)
  • 9:30 a.m.
    Critical thresholds on compressible Eulerian dynamics with nonlocal alignment.
    Changhui Tan*, University of Maryland
    (1090-35-392)
  • 10:00 a.m.
    Compressible Navier-Stokes equations with temperature dependent dissipation.
    Ronghua Pan*, Georgia Institute of Technology
    Weizhe Zhang, Georgia Institute of Technology
    (1090-35-391)
• Sunday April 28, 2013, 8:00 a.m.-10:50 a.m.
  Special Session on Multi-Dimensional Dynamical Systems, III
  Room 190, Carver
  Organizers:
  Jayadev Athreya, University of Illinois, Urbana-Champaign jathreya@illinois.edu
  Jonathan Chaika, University of Chicago
  Joseph Rosenblatt, University of Illinois at Urbana-Champaign
  

  • 9:00 a.m.
    Discussion
  • 9:30 a.m.
    Typical Homeomorphisms.
    Kelly B Yancey*, University of Illinois at Urbana-Champaign
    (1090-37-406)
  • 10:00 a.m.
    Fixed points of nilpotent actions on surfaces.
    K. Parwani*, Eastern Illinois University
    (1090-37-257)
  • 10:30 a.m.
    Fuchsian groups and generalized Bowen-Series transformations.
    Svetlana Katok, The Pennsylvania State University
    Ilie Ugarcovici*, DePaul University
    (1090-37-377)
• 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 Navier-Stokes and related equations.
    Eitan Tadmor*, University of Maryland
    (1090-65-169)
  • 9:00 a.m.
    A New Runge-Kutta Discontinuous Galerkin Method with Conservation Constraints to Improve CFL Condition for Solving Conservation Laws.
    Zhiliang Xu, Notre Dame
    Xu-Yan Chen, Georgia Tech
    Yingjie Liu*, School of Math, Georgia Tech
    (1090-65-264)
  • 9:30 a.m.
    An Efficient Rescaling Algorithm for Simulating the Evolution of Multiple Elastically Stressed Precipitates.
    Shuwang Li*, Illinois Institute of Technology
    (1090-74-221)
  • 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
    Hyung-Chun Lee, Ajou University
    (1090-65-126)
  • 10:30 a.m.
    Direct Discontinuous Galerkin Methods for Dispersive Integrable Equations.
    Hailiang Liu*, Iowa State University
    (1090-65-357)
• 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
    (1090-46-66)
  • 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 Nebraska--Lincoln
    Vrej Zarikian, U. S. Naval Academy
    (1090-47-189)
  • 9:30 a.m.
    The Lattice of Bures-Closed Bimodules in Cartan Pairs.
    Adam H. Fuller*, University of Nebraska - Lincoln
    David R. Pitts, University of Nebraska - Lincoln
    (1090-47-310)
  • 10:00 a.m.
    States on k-Graph C*-algebras.
    Jonathan H Brown, Kansas State University
    Gabriel Nagy, Kansas State University
    Sarah A Reznikoff*, Kansas State University
    (1090-46-415)
  • 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
    (1090-47-131)
• 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
    (1090-35-16)
  • 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
    (1090-35-96)
  • 9:00 a.m.
    Regularity criteria of N-dimensional porous media equation in terms of one partial derivative or pressure scalar field.
    Kazuo Yamazaki*, Department of Mathematics, Oklahoma State University
    (1090-35-06)
  • 9:30 a.m.
    Slightly super-critical 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
    (1090-35-86)
  • 10:00 a.m.
    Global Well-posedness for 2D Radial Schrödinger Maps into the Sphere.
    Eva Hang Koo*, University of Iowa
    Stephen Gustafson, University of British Columbia
    (1090-35-274)
  • 10:30 a.m.
    A nonlinear moving-boundary parabolic-hyperbolic problem arising in blood flow modeling: a constructive existence proof.
    Suncica Canic*, University of Houston
    Boris Muha, University of Zagreb
    (1090-35-36)
• 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
    (1090-92-341)
  • 9:00 a.m.
    Numerical methods for chemotaxis models.
    Yekaterina Epshteyn*, University of Utah
    (1090-65-122)
  • 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
    (1090-92-268)
• 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 CI-Groupoids of Bol-Moufang Type.
    David Failing*, Iowa State University
    (1090-08-214)
  • 9:00 a.m.
    A class of loops categorically isomorphic to Bruck loops of odd order.
    Mark B. Greer*, University of Denver
    (1090-20-188)
  • 9:30 a.m.
    Dihedral-like constructions of automorphic loops.
    Mouna R Aboras*, University of Denver
    (1090-20-58)
  • 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
    (1090-17-400)
  • 10:30 a.m.
    Loops presented by finite automata.
    Michael Kinyon*, University of Denver
    Rick M. Thomas, University of Leicester
    (1090-20-380)
• 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/CCR-La Jolla
    (1090-16-425)
  • 8:30 a.m.
    Quasipolar and Pseudopolar Matrix Rings.
    Alexander J Diesl*, Wellesley College
    Thomas J Dorsey, Center for Communications Research
    (1090-16-290)
  • 9:00 a.m.
    Generalizations of Shoda's Theorem.
    Zak Mesyan*, University of Colorado, Colorado Springs
    (1090-16-224)
  • 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
    (1090-16-215)
  • 10:00 a.m.
    Jacobson Pairs and Regular Elements.
    T.Y. Lam, University of California Berkeley
    Pace P. Nielsen*, Brigham Young University
    (1090-16-39)
  • 10:30 a.m.
    Diophantine Sets of Representations.
    Ivo Herzog*, The Ohio State University at Lima
    Sonia L'Innocente, University of Camerino
    (1090-16-155)
• 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.
    Small-time asymptotics of stopped Lévy bridges and simulation schemes with controlled bias.
    Jose E Figueroa-Lopez*, Purdue University
    Peter Tankov, Universite Paris-Diderot (Paris 7)
    (1090-60-358)
  • 8:30 a.m.
    Large deviations in multi-time scale stochastic systems.
    Rohini Kumar*, Wayne State University
    Jin Feng, Kansas University
    Jean-Pierre Fouque, University of California, Santa Barbara
    (1090-60-265)
  • 9:00 a.m.
    Large Deviations for Stochastic Partial Differential Equations Driven by a Poisson Random Measure.
    Amarjit Budhiraja, University of North Carolina-Chapel Hill
    Jiang Chen*, University of North Carolina-Chapel Hill
    Paul Dupuis, Lefschetz Center for Dynamical Systems, Division of Applied Mathematics, Brown University
    (1090-60-08)
  • 9:30 a.m.
    Dynamic Scheduling for Markov Modulated Single-server 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
    (1090-60-244)
  • 10:00 a.m.
    Optimal rate for a queueing system in heavy traffic with superimposed On-Off arrivals.
    Arka P Ghosh*, Iowa State University
    (1090-60-325)
  • 10:30 a.m.
    Accumulation and spread of mutations in a spatially structured population.
    Jasmine Foo*, University of Minnesota
    (1090-60-339)
• Sunday April 28, 2013, 8:00 a.m.-10:20 a.m.
  Special Session on Topology of 3-Manifolds, 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
    (1090-57-254)
  • 8:30 a.m.
    Gabai degeneracy and fractional Dehn twist coefficients.
    Rachel Roberts*, Washington University in St Louis
    William H. Kazez, University of Georgia
    (1090-57-292)
  • 9:00 a.m.
    High Distance Heegaard Splittings via Dehn Twists.
    Michael Yoshizawa*, UC Santa Barbara
    (1090-57-76)
  • 9:30 a.m.
    A lower bound on the Heegaard genus of amalgamated 3-manifolds.
    T F Schirmer*, Oklahoma State University
    (1090-57-311)
  • 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
    (1090-57-99)
• 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
    (1090-05-162)
  • 8:30 a.m.
    New perspectives on Rosenfeld's theorem.
    Louis Deaett*, Quinnipiac University
    (1090-15-185)
  • 9:00 a.m.
    Colin de Verdière-type 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
    (1090-05-152)
  • 9:30 a.m.
    Colin de Verdière Parameters of Chordal Graphs.
    Shaun M Fallat*, University of Regina
    Lon H Mitchell, American Mathematical Society
    (1090-15-109)
  • 10:00 a.m.
    Getting something for nothing (using transversality, linear algebra and combinatorics).
    Bryan L Shader*, University of Wyoming
    (1090-15-204)
• 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
    (1090-03-432)
  • 8:45 a.m.
    Sums and products of smooth numbers.
    David J. Covert*, University of Missouri - Saint Louis
    (1090-11-246)
  • 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
    (1090-05-53)
  • 9:15 a.m.
    Discussion
  • 9:30 a.m.
    (0,1)-improper coloring of sparse graph.
    Jaehoon Kim*, University of Illinois at Urbana-Champaign
    Alexandr V Kostochka, University of Illinois at Urbana-Champaign
    Xuding Zhu, National Sun Yat-sen University
    (1090-05-157)
  • 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 Urbana-Champaign
    Behnaz Omoomi, Isfahan University of Technology
    (1090-05-247)
  • 10:00 a.m.
    Large incidence-free sets in geometries.
    Stefaan De Winter*, Michigan Technological University
    (1090-05-322)
  • 10:15 a.m.
    Edge exchanges and realizations of $k$-graphic sequences.
    Sarah Behrens*, University of Nebraska-Lincoln
    Catherine Erbes, University of Colorado Denver
    Michael Ferrara, University of Colorado Denver
    Stephen Hartke, University of Nebraska-Lincoln
    Ben Reiniger, University of Illinois Urbana-Champaign
    Hannah Spinoza, University of Illinois Urbana-Champaign
    Charles Tomlinson, University of Nebraska-Lincoln
    (1090-05-422)
  • 10:30 a.m.
    Lower Bound Techniques for Radio Numbers of Trees.
    Katherine Benson*, The University of Iowa
    (1090-05-102)
  • 10:45 a.m.
    Positive semidefinite maximum nullity and zero forcing number.
    Travis Peters*, Culver-Stockton College
    (1090-15-35)
• 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
  (1090-28-02)
• 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
  (1090-01-01)
• 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 Wisconsin-Madison
  

  • 2:30 p.m.
    A characterization of commutative standard table algebras with at most one nontrivial multiplicity.
    Angela L. Antonou*, Northern Illinois University
    (1090-20-200)
  • 3:00 p.m.
    Totally bipartite Leonard pairs and Leonard triples.
    George M. F. Brown*, University of Wisconsin---Stout
    (1090-05-354)
  • 3:30 p.m.
    Functors from Association Schemes.
    Christopher P French*, Grinnell College
    (1090-20-213)
  • 4:00 p.m.
    Schur indices of the rational adjacency algebras of coherent configurations.
    Allen Herman*, University of Regina
    (1090-16-137)
  • 4:30 p.m.
    Toric partial orders.
    Mike Develin, Menlo Park, CA
    Matthew Macauley*, Clemson University
    Victor Reiner, University of Minnesota
    (1090-05-388)
• 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
    (1090-49-79)
  • 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
    (1090-30-318)
  • 3:30 p.m.
    Entropy rigidity in coarse geometry.
    Kyle E. Kinneberg*, UCLA
    (1090-51-90)
  • 4:00 p.m.
    Expansion and compression principles in quasiconformal mapping theory.
    Christopher J. Bishop, Stony Brook University
    Hrant Hakobyan*, Kansas State University
    (1090-30-412)
• 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
    (1090-13-334)
  • 3:00 p.m.
    $\tau$-Factorization in Commutative Rings with Zero-Divisors.
    Christopher Park Mooney*, The University of Iowa
    (1090-13-89)
  • 3:30 p.m.
    Generalized Integer Factorizations.
    Alina Florescu*, The University of Iowa
    (1090-13-434)
• 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 bi-immunity.
    Carl G. Jockusch*, University of Illinois at Urbana-Champaign
    Andrew E. M. Lewis, University of Leeds
    (1090-03-156)
  • 3:00 p.m.
    On the Space Complexity of the Graph Reachability Problem.
    Vinodchandran N Variyam*, University of Nebraska-Lincoln
    (1090-68-394)
  • 3:30 p.m.
    Strongly minimal theories with computable models.
    Uri Andrews, University of Wisconsin-Madison
    Julia F. Knight*, University of Notre Dame
    (1090-03-88)
  • 4:00 p.m.
    Effective dimension in general metric spaces.
    Elvira Mayordomo*, Universidad de Zaragoza, Spain
    (1090-68-171)
• 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 Nebraska-Lincoln
    (1090-06-384)
  • 3:00 p.m.
    Edge-disjoint rainbow spanning tees in complete graphs.
    James M Carraher*, University of Nebraska--Lincoln
    Stephen G Hartke, University of Nebraska--Lincoln
    Paul Horn, Harvard University
    (1090-05-111)
  • 3:30 p.m.
    Hypergraph Coloring with Hyperspectra.
    Franklin H. J. Kenter*, University of California, San Diego
    Michael Tait, University of California, San Diego
    (1090-15-332)
  • 4:00 p.m.
    Sum list coloring, the sum choice number, and sc-greedy graphs.
    Michelle A Lastrina*, Dickinson College
    Michael Young, Iowa State University
    (1090-05-284)
• Sunday April 28, 2013, 2:30 p.m.-4:20 p.m.
  Special Session on Kinetic and Hydrodynamic PDE-based Descriptions of Multi-scale 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
    (1090-74-94)
  • 3:30 p.m.
    Gaussian Beam methods for the Helmholtz equation.
    Hailiang Liu*, Iowa State University
    (1090-35-356)
• 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.
    High-order asymptotic preserving discontinuous Galerkin schemes to discrete-velocity kinetic equations in a diffusive regime.
    Juhi Jang, UC Riverside
    Fengyan Li, RPI
    Jingmei Qiu*, University of Houston
    Tao Xiong, University of Houston
    (1090-65-57)
  • 3:00 p.m.
    Discontinuous Galerkin Constrained Transport Schemes for Ideal Magnetohydrodynamics in Multiple Dimensions.
    James Rossmanith*, Iowa State University
    (1090-65-238)
  • 3:30 p.m.
    On node distributions for interpolation and spectral methods.
    Nguyen Hoang*, Department of Mathematics, The University of Oklahoma
    (1090-65-22)
• 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
    (1090-42-309)
  • 3:00 p.m.
    Quasinormal Toeplitz operators with matrix-valued rational symbols.
    Raul E. Curto*, University of Iowa
    (1090-47-192)
• 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
    (1090-35-70)
  • 3:00 p.m.
    Solvability of linear local and nonlocal Robin problems over $C(\overline{\Omega})$.
    Alejandro Velez-Santiago*, University of Puerto Rico at Humacao
    (1090-35-146)
  • 3:30 p.m.
    Error Estimates of the Bloch Band-Based Gaussian Beam Superposition for the Schrödinger Equation.
    Maksym Pryporov*, Iowa State University
    Hailiang Liu, Iowa State University
    (1090-35-321)
  • 4:00 p.m.
    Liouville Theorems for positive solutions in a cylinder for uniformly elliptic operators.
    Lihe Wang*, The University of Iowa
    (1090-35-239)
• 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
    (1090-92-404)
  • 3:30 p.m.
    Multiscale approximations in stochastic biochemical networks.
    Hye-Won Kang*, Mathematical Biosciences Institute, Ohio State University
    (1090-92-337)
• 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
    (1090-20-410)
  • 3:00 p.m.
    Special Majorana algebras and $3$-transposition groups.
    Jonathan I Hall*, Department of Mathematics, Michigan State University
    (1090-20-219)
  • 3:30 p.m.
    A collection of algebras arising from a loop or a quasigroup.
    Kenneth W Johnson*, Penn state Abington
    (1090-20-387)
  • 4:00 p.m.
    Digroups and diquasigroups.
    Jonathan D.H. Smith*, Iowa State University
    (1090-20-153)
• 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 all-healthy state.
    Chi-Jen Wang*, Ames Laboratory-USDOE, Departments of Mathematics, Iowa State University
    Da-Jiang Liu, Ames Laboratory-USDOE
    James W. Evans, Ames Laboratory-USDOE, Departments of Mathematics and Physics & Astronomy, Iowa State University
    (1090-60-307)
  • 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
    (1090-60-124)
  • 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
    (1090-60-223)
  • 4:00 p.m.
    Ontological models for quantum theory: some recent perspectives.
    Raffaele Romano*, Iowa State University, Department of Mathematics
    (1090-81-07)
• Sunday April 28, 2013, 2:30 p.m.-4:20 p.m.
  Special Session on Topology of 3-Manifolds, 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
    (1090-57-179)
  • 3:00 p.m.
    Cosmetic crossings and twisting operations in knots.
    Cheryl Balm*, Michigan State University
    Effie Kalfagianni, Michigan State University
    (1090-57-172)
  • 3:30 p.m.
    How many hyperbolic 3-manifolds can have the same volume?
    Christian R. Millichap*, Temple University
    (1090-57-138)
  • 4:00 p.m.
    Invariants for some everywhere wild knots.
    Ollie Nanyes*, Bradley University
    (1090-57-181)
• 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
    (1090-13-150)
  • 2:45 p.m.
    Embedded annuli and Jones' conjecture.
    Douglas J LaFountain*, Western Illinois University
    William W Menasco, University at Buffalo
    (1090-57-226)
  • 3:00 p.m.
    Weighted Composition Operators between Weighted Bergman and $S^{p}$ Spaces.
    Waleed K. Al-Rawashdeh*, Montana Tech
    (1090-46-158)
  • 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 Pan-American
    (1090-76-439)
  • 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
    (1090-93-421)
  • 3:45 p.m.
    Geometric Figures as Sets of Parallel, Convergent and Divergent Plane Surfaces.
    Stewart Ernest Brekke*, none
    (1090-00-42)

Inquiries: meet@ams.org

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