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2011 Fall Central Section Meeting
University of NebraskaLincoln, Lincoln, NE
October 1416, 2011 (Friday  Sunday)
Meeting #1074
Associate secretaries:
Georgia Benkart, AMS benkart@math.wisc.edu
Friday October 14, 2011

Friday October 14, 2011, 2:00 p.m.6:00 p.m.
Book sale and exhibit.
B13 Math Resource Room, Avery Hall

Friday October 14, 2011, 2:00 p.m.6:00 p.m.
Sectional Meeting Registration.
Lobby Area  Level 0  Avery Hall, Avery Hall

Friday October 14, 2011, 2:55 p.m.3:45 p.m.
Invited Address
Entropy theory for actions of sofic groups.
Room 115, Avery Hall
Lewis P. Bowen*, Texas A&M University
(10743701)

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Algorithmic and Geometric Properties of Groups and Semigroups, I
Room 119, Avery Hall Organizers: Susan Hermiller, University of NebraskaLincoln shermiller2@math.unl.edu John Meakin, University of NebraskaLincoln

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Association Schemes and Related Topics, I
Room 108, Avery Hall Organizers: Sung Y. Song, Iowa State University sysong@iastate.edu Paul Terwilliger, University of Wisconsin Madison

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Asymptotic Behavior and Regularity for Nonlinear Evolution Equations, I
Room 204, Burnett Hall Organizers: Petronela Radu, University of NebraskaLincoln pradu@math.unl.edu Lorena Bociu, University of NebraskaLincoln

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Coding Theory, I
Room 110, Avery Hall Organizers: Christine Kelley, University of NebraskaLincoln ckelley2@math.unl.edu Judy Walker, University of NebraskaLincoln

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Commutative Algebra, I
Room 107, Burnett Hall Organizers: Christina EubanksTurner, University of Louisiana at Lafayette ceturner@louisiana.edu Aihua Li, Montclair State University

Friday October 14, 2011, 4:00 p.m.5:45 p.m.
Special Session on Computational and Applied Mathematics, I
Room 124, Burnett Hall Organizers: Ludwig Kohaupt, Beuth University of Technology Berlin, Germany kohaupt@bhtberlin.de Yan Wu, Georgia Southern University

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Continuous and Numerical Analysis in the Control of PDE's, I
Room 203, Burnett Hall Organizers: George Avalos, University of NebraskaLincoln Mohammad Rammaha, University of NebraskaLincoln Daniel Toundykov, University of NebraskaLincoln dtoundykov2@unl.edu

4:00 p.m.
Studies of a model in Xray darkfield tomography.
Weimin Han*, Department of Mathematics, University of Iowa, Iowa City, IA 52242, USA
(10746535)

4:30 p.m.
Linear stability analysis for traveling waves of second order in time PDE's.
Milena Stanislavova*, University of Kansas
Atanas Stefanov, University of Kansas
(107435241)

5:00 p.m.
MultiDimensional Stability of Discrete Traveling Waves.
Erik S Van Vleck*, University of Kansas
(107435182)

5:30 p.m.
Asymptotic behavior of a determining form for the 2D NavierStokes equations.
Ciprian Foias, Texas A&M University
Michael Jolly*, Indiana University
Rostyslav Kravchenko, University of Chicago
Edriss Titi, University of California Irvine, Weizmann Institute
(107435281)

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Discrete Methods and Models in Biomathematics, I
Room 121, Burnett Hall Organizers: Dora Matache, University of NebraskaOmaha Jim Rogers, University of NebraskaOmaha Alan VelizCuba, University of NebraskaLincoln avelizcuba2@unl.edu

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Dynamic Systems on Time Scales with Applications, I
Room 118, Burnett Hall Organizers: Lynn Erbe, University of NebraskaLincoln lerbe@math.unl.edu Allan Peterson, University of NebraskaLincoln

4:00 p.m.
Time Scales Ostrowski and Grüss Type Inequalities involving Three Functions.
Elvan AkinBohner, Missouri S&T
Martin Bohner*, Missouri S&T
Thomas Matthews, Missouri S&T
(107434180)

4:30 p.m.
Oscillation of Even Order Nonlinear Delay Dynamic Equations on Time Scales.
Raziye Mert*, Çankaya University, Department of Mathematics and Computer Science, 06530, Ankara,Turkey
Ağacık Zafer, Middle East Technical University, Department of Mathematics, 06531, Ankara, Turkey
(10743494)

5:00 p.m.
Some results on the stability of the generalized exponential function on time scales.
Chris R Ahrendt*, University of WisconsinEau Claire
Kevin A Ahrendt, University of NebraskaLincoln
(10743996)

5:30 p.m.
Almost oscillatory threedimensional dynamical systems.
Elvan Akin Bohner*, Missouri University S&T
Zuzana Dosla, Masaryk University Brno
Bonita Lawrence, Marshall University Huntington
(107437158)

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Dynamical Systems and Operator Algebras, I
Room 119, Burnett Hall Organizers: Lewis Bowen, Texas A&M University lpbowen@math.tamu.edu David Kerr, Texas A&M University

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Extremal and Probabilistic Combinatorics, I
Room 118, Avery Hall Organizers: Stephen Hartke, University of NebraskaLincoln hartke@math.unl.edu Jamie Radcliffe, University of NebraskaLincoln

4:00 p.m.
Hitting random set systems.
Anant Godbole*, East Tennessee State University (ETSU)
Jessie Deering, ETSU
William Jamieson, ETSU
Lucia Petito, University of Rochester
(10740544)

4:30 p.m.
The maximum size of a Sidon set contained in a sparse random set of integers.
Yoshiharu Kohayakawa, IME, University of Sao Paulo
Sangjune Lee*, Department of Math and CS, Emory University
Vojtech Rodl, Department of Math and CS, Emory University
(10740536)

5:00 p.m.
Identification of strategies for liartype games via discrepancy from their linear approximations.
Joshua N. Cooper, University of South Carolina
Robert B. Ellis*, Illinois Institute of Technology
Daniel Tietzer, Illinois Institute of Technology
James Williamson, Illinois Institute of Technology
(107405271)

5:30 p.m.
Cops and Robbers on Geometric Graphs.
Andrew Beveridge*, Macalester College
Andrzej Dudek, Western Michigan University
Alan Frieze, Carnegie Mellon University
Tobias Mueller, Centrum voor Wiskunde en Informatica
(107405227)

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Invariants in Knot Theory and Lowdimensional Topology, I
Room 109, Avery Hall Organizers: Mark Brittenham, University of NebraskaLincoln mbrittenham2@math.unl.edu Robert Todd, University of NebraskaOmaha rtodd@unomaha.edu

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Local Commutative Algebra, I
Room 103, Burnett Hall Organizers: H. Ananthnarayan, University of NebraskaLincoln ahariharan2@math.unl.edu Inês B. Henriques, University of California Riverside Hamid Rahmati, Syracuse University

Friday October 14, 2011, 4:00 p.m.5:45 p.m.
Special Session on Quantum Groups and Representation Theory, I
Room 111, Avery Hall Organizers: Jonathan Kujawa, University of Oklahoma kujawa@ou.edu Natasha Rozhkovskaya, Kansas State University

Friday October 14, 2011, 4:00 p.m.5:50 p.m.
Special Session on Recent Progress in Operator Algebras, I
Room 120, Burnett Hall Organizers: Allan P. Donsig, University of NebraskaLincoln adonsig1@unl.edu David R. Pitts, University of NebraskaLincoln

Friday October 14, 2011, 5:00 p.m.5:50 p.m.
Special Session on Matrices and Graphs, I
Room 112, Avery Hall Organizers: InJae Kim, Minnesota State University injae.kim@mnsu.edu Adam Berliner, St. Olaf College Leslie Hogben, Iowa State University Bryan Shader, University of Wyoming

5:00 p.m.
Positive semidefinite maximum nullity is equal to positive semidefinite zero forcing number for partial $2$trees.
Jason Ekstrand, Department of Mathematics, Iowa State University
Craig Erickson*, Department of Mathematics, Iowa State University
Diana Hay, Department of Mathematics, Iowa State University
Leslie Hogben, Department of Mathematics, Iowa State University
Jolie Roat, Department of Mathematics, Iowa State University
(107405153)

5:30 p.m.
Positive Semidefinite Zero Forcing.
Travis A. Peters*, Iowa State University
(10741564)

Friday October 14, 2011, 8:30 p.m.9:30 p.m.
Graduate Student Poster Session
Ballroom, Downtown Holiday Inn
Saturday October 15, 2011

Saturday October 15, 2011, 7:30 a.m.4:00 p.m.
Book sale and exhibit.
B13 Math Resource Room, Avery Hall

Saturday October 15, 2011, 7:30 a.m.4:00 p.m.
Sectional Meeting Registration.
Lobby Area  Level 0  Avery Hall, Avery Hall

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Algebraic Geometry and Graded Commutative Algebra, I
Room 103, Burnett Hall Organizers: Susan Cooper, Central Michigan University s.cooper@cmich.edu Brian Harbourne, University of NebraskaLincoln

8:00 a.m.
Gorenstein algebras presented by quadrics.
Juan Migliore, University of Notre Dame
Uwe Nagel*, University of Kentucky
(107413165)

8:30 a.m.
On the Interval Property in algebra and combinatorics.
Fabrizio Zanello*, MIT and Michigan Tech
(10741334)

9:00 a.m.
Logconcavity of asymptotic multigraded Hilbert series.
Gregory G Smith*, Queen's University
Adam McCabe, University of Toronto
(107413142)

9:30 a.m.
New examples of defective secant varieties of SegreVeronese varieties.
Hirotachi Abo*, University of Idaho
Maria Chiara Brambilla, Universita Politecnica Delle Marche
(107414173)

10:00 a.m.
Bounding projective dimension and regularity.
Alexandra Seceleanu*, University of NebraskaLincoln
Jesse Beder, University of Illinois at UrbanaChampaign
Jason McCullough, University of California, Riverside
Luis NunezBetancourt, University of Michigan
Bart Snapp, Ohio State University
Brandon Stone, University of Kansas
(107413199)

10:30 a.m.
CohenMacaulay Toric Rings Arising from Finite Graphs.
Augustine B O'Keefe*, Tulane University
Huy TÃ i HÃ, Tulane University
(107413291)

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Algorithmic and Geometric Properties of Groups and Semigroups, II
Room 119, Avery Hall Organizers: Susan Hermiller, University of NebraskaLincoln shermiller2@math.unl.edu John Meakin, University of NebraskaLincoln

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Association Schemes and Related Topics, II
Room 108, Avery Hall Organizers: Sung Y. Song, Iowa State University sysong@iastate.edu Paul Terwilliger, University of Wisconsin Madison

8:00 a.m.
Sylow theory for quasigroups.
Jonathan D.H. Smith*, Department of Mathematics, Iowa State University
(107420225)

8:30 a.m.
$2$Srings of groups and generalizations.
Kenneth W Johnson*, The Pennsylvania State University, Abington College
(107420197)

9:00 a.m.
Two commuting operators associated with a tridiagonal pair.
Sarah R. Bockting*, University of Wisconsin  Madison
(107405319)

9:30 a.m.
Connections with BLTsets.
Eric M. Nelson*, Colorado State University
(107405229)

10:00 a.m.
Bidiagonal pairs, the Lie algebra $\mathfrak{sl}_2$, and the quantum group $U_q(\mathfrak{sl}_2)$.
Darren R. FunkNeubauer*, Colorado State University  Pueblo
(107415257)

10:30 a.m.
All simple groups are characterized by their noncommuting graphs.
Ron Solomn, The Ohio State University
Andrew Woldar*, Villanova University
(107405178)

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Asymptotic Behavior and Regularity for Nonlinear Evolution Equations, II
Room 204, Burnett Hall Organizers: Petronela Radu, University of NebraskaLincoln pradu@math.unl.edu Lorena Bociu, University of NebraskaLincoln

8:00 a.m.
Variational theory for some nonlocal problems.
Tadele A Mengesha*, Penn State University
(107445306)

8:30 a.m.
The role of curvature and nonlinearities in stability of waves on compact surfaces.
Marcelo M Cavalcanti*, State University of Maringa
(10743582)

9:00 a.m.
Existence and stability of viscoelastic shock profiles.
Marta Lewicka*, University of Pittsburgh
(107435248)

9:30 a.m.
Stability of planar interfaces in twophase porous media flow.
Michael Shearer*, NC State University
Kim Spayd, NC State University
Zhengzheng Hu, NC State University
(107435114)

10:00 a.m.
Decay of solutions to damped Kortewegde Vries type equation.
Valeria N Domingos Cavalcanti*, State University of Maringa
(10743583)

10:30 a.m.
A Liouville comparison principle for entire weak sub and supersolutions of the equation $w_t\Delta_p (w) = w^{q1}w$.
Vasilii V. Kurta*, Mathematical Reviews, 416 Fourth Street, P.O. Box 8604, Ann Arbor, MI 48107, USA
(10743529)

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Commutative Algebra, II
Room 107, Burnett Hall Organizers: Christina EubanksTurner, University of Louisiana at Lafayette ceturner@louisiana.edu Aihua Li, Montclair State University

8:00 a.m.
Star (prime) operations on Noetherian domains.
Evan G Houston*, Univ. of NC at Charlotte
(10741398)

8:30 a.m.
On the number of generators for ideals in rings of integervalued polynomials.
Lee Klingler*, Florida Atlantic University
Yuri Villanueva, Florida Atlantic University
(10741346)

9:00 a.m.
Questions on symbolic powers.
Craig Huneke*, University of Kansas
Brian Harbourne, University of Nebraska
(10741359)

9:30 a.m.
Topological and geometric criteria for irredundancy of an intersection of valuation rings.
Bruce M Olberding*, New Mexico State University
(107413221)

10:00 a.m.
Ideals that are an irredundant union of principal ideals.
D. D. Anderson*, The University of Iowa
Sangmin Chun, Seoul National University
(10741380)

10:30 a.m.
Nakayama's Lemma for Ext and Ascent for Module Structures.
Ben J Anderson*, North Dakota State University
Sean SatherWagstaff, North Dakota State University
(107413251)

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Computational and Applied Mathematics, II
Room 124, Burnett Hall Organizers: Ludwig Kohaupt, Beuth University of Technology Berlin, Germany kohaupt@bhtberlin.de Yan Wu, Georgia Southern University

8:00 a.m.
Controllability and Observability of Matrix Differential Algebraic Equations.
Yan Wu*, Department of Mathematical Sciences/Georgia Southern University
(10749332)

8:30 a.m.
Stability results for sizestructured population dynamics models with maturation.
M. ElDoma*, University of Khartoum, Faculty of Mathematical Sciences, KhartoumSudan
(10749211)

9:00 a.m.
An potentialtheoretic construction of the SchwarzChristoffel map for multiply connected domains.
Valentin V Andreev, Lamar University
Timothy H McNicholl*, Lamar University
(10743023)

9:30 a.m.
Construction of Green's functions for twodimensional Laplace equation in spherical coordinates.
Volodymyr Borodin*, Middle Tennessee State University
(107435124)

10:00 a.m.
Green's functionsbased approach to the representation of elementary functions by infinite products.
Yuri A. Melnikov*, Professor of Mathematics, Middle Tennessee State University, Murfreesboro, TN 37132
(107465219)

10:30 a.m.
Mixedenhanced quadrilateral finite elements with Wachspresstype functions.
Reinhard Piltner*, Department of Mathematical Sciences, Georgia Southern University
Lixin Li, Department of Computer Sciences, Georgia Southern University
(107474174)

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Continuous and Numerical Analysis in the Control of PDE's, II
Room 203, Burnett Hall Organizers: George Avalos, University of NebraskaLincoln Mohammad Rammaha, University of NebraskaLincoln Daniel Toundykov, University of NebraskaLincoln dtoundykov2@unl.edu

8:00 a.m.
Global regularity and scattering for quadratic KleinGordon equation in two space dimensions.
Atanas G. Stefanov*, University of Kansas
Vladimir Georgiev, University of Pisa, Italy
(107435267)

8:30 a.m.
On the unique continuation for some hyperbolic systems of PDE with timeindependent $C^1$coefficients.
Matthias Eller*, Department of Mathematics, Georgetown University
(107435236)

9:00 a.m.
Controlling the Constraints in Hyperbolic Evolution Systems.
Nicolae Tarfulea*, Purdue University Calumet
(107435116)

9:30 a.m.
Optimal source selection and sparsity regularization in diffuse optical tomography.
Jack Cooper*, Clemson University
(107435311)

10:00 a.m.
On the computation of tracking initial condition.
YuMin Chung*, Mathematics Dept., Indiana UniversityBloomington
(107465193)

10:30 a.m.
Infinitesimal isometries on developable surfaces and asymptotic theories of elastic developable films.
Marta Lewicka*, University of Pittsburgh
(107449247)

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Dynamic Systems on Time Scales with Applications, II
Room 118, Burnett Hall Organizers: Lynn Erbe, University of NebraskaLincoln lerbe@math.unl.edu Allan Peterson, University of NebraskaLincoln

8:00 a.m.
Existence of positive solutions of $2n$th order system periodic boundary value problems via eigenvalue approach.
Qingkai Kong, Northern Illinois University
Min Wang*, University of Tennessee at Chattanooga
(107434122)

8:30 a.m.
Gronwall's Inequality on Discrete Fractional Calculus.
Ferhan M. Atici*, Western Kentucky University, Bowling Green, KY.
Paul W. Eloe, University of Dayton, Dayton, OH.
(107439111)

9:00 a.m.
Oscillation of a SecondOrder Linear Delay Dynamic Equation.
Raegan Higgins*, Texas Tech University
(107439190)

9:30 a.m.
The Rational Expectations: A New Formulation of the SingleEquation Model on Time Scales.
Funda Ekiz*, Western Kentucky University, Bowling Green, KY
Ferhan M. Atici, Western Kentucky University, Bowling Green, KY
(107439181)

10:00 a.m.
Periodic solutions of a secondorder differential equation with $p$Laplacian operator.
Eric R Kaufmann*, University of Arkansas at Little Rock
(107434245)

10:30 a.m.
Using time scales to study multiinterval SturmLiouville problems with interface conditions.
Qingkai Kong*, Northern Illinois University
QiRu Wang, Zhongshan University, P. R. China
(10743472)

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Dynamical Systems and Operator Algebras, II
Room 119, Burnett Hall Organizers: Lewis Bowen, Texas A&M University lpbowen@math.tamu.edu David Kerr, Texas A&M University

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Matrices and Graphs, II
Room 112, Avery Hall Organizers: InJae Kim, Minnesota State University injae.kim@mnsu.edu Adam Berliner, St. Olaf College Leslie Hogben, Iowa State University Bryan Shader, University of Wyoming

8:00 a.m.
Bounding inertia sets of graphs.
Steve Butler*, Iowa State University
(107415176)

9:00 a.m.
The Inverse Inertia Problem for an Outerplanar Graph.
John Sinkovic*, Brigham Young University
(107415330)

9:30 a.m.
Minimum Skew Rank of Some Outerplanar Graphs.
Luz M. DeAlba*, Drake University
(10740551)

10:00 a.m.
The Inverse Eigenvalue Problem for Graphs of Low Minimum Rank.
Wayne Barrett*, Department of Mathematics, Brigham Young University
Seth Gibelyou, Provo, Utah
Mark Kempton, Department of Mathematics, University of California, San Diego
Nicole Malloy, Department of Mathematics, Brigham Young University
Curtis Nelson, Department of Mathematics, Brigham Young University
William Sexton, Department of Mathematics, Brigham Young University
John Sinkovic, Department of Mathematics, Brigham Young University
(107415103)

10:30 a.m.
Bounds for minimum rank problems from superpositions and cut sets.
Sivaram K. Narayan*, Central Michigan University
(10741519)

Saturday October 15, 2011, 8:00 a.m.10:50 a.m.
Special Session on Quantum Groups and Representation Theory, II
Room 111, Avery Hall Organizers: Jonathan Kujawa, University of Oklahoma kujawa@ou.edu Natasha Rozhkovskaya, Kansas State University

8:00 a.m.
Cohomological detection for Lie superalgebras with applications to support varieties.
Daniel K. Nakano*, University of Georgia
(10741755)

9:00 a.m.
Yangians and quantum loop algebras.
Sachin Gautam*, Columbia University
(107481145)

9:30 a.m.
Support varieties and representation type of selfinjective algebras.
Joerg Feldvoss*, Department of Mathematics and Statistics, University of South Alabama, Mobile, AL 36688
Sarah Witherspoon, Department of Mathematics, Texas A&M University, College Station
(107416123)

10:00 a.m.
Some quantum analogues of results from Lie algebra cohomology.
Christopher M. Drupieski*, University of Georgia
(10741793)

10:30 a.m.
Cohomology for infinitesimal unipotent algebraic and quantum groups.
Christopher M. Drupieski, University of Georgia
Daniel K. Nakano, University of Georgia
Nham V. Ngo*, University of Georgia
(10742005)

Saturday October 15, 2011, 8:30 a.m.10:50 a.m.
Special Session on Coding Theory, II
Room 110, Avery Hall Organizers: Christine Kelley, University of NebraskaLincoln ckelley2@math.unl.edu Judy Walker, University of NebraskaLincoln

Saturday October 15, 2011, 8:30 a.m.10:50 a.m.
Special Session on Extremal and Probabilistic Combinatorics, II
Room 118, Avery Hall Organizers: Stephen Hartke, University of NebraskaLincoln hartke@math.unl.edu Jamie Radcliffe, University of NebraskaLincoln

8:30 a.m.
The Chinese Postman Problem in regular graphs of odd degree.
Suil O, College of William and Mary
Douglas B. West*, University of Illinois  Urbana
(107405194)

9:00 a.m.
Residues and independence numbers of unigraphs.
Michael D. Barrus*, Black Hills State University
(107405256)

9:30 a.m.
Pancyclicity of 4Connected, ClawFree, $P_{10}$Free Graphs.
Michael Ferrara*, University of Colorado Denver
TImothy Morris, University of Colorado Denver
Paul Wenger, University of Colorado Denver
(107405156)

10:00 a.m.
Finding Large Induced Subgraphs.
Hemanshu Kaul*, Illinois Institute of Technology
(107405318)

10:30 a.m.
On the edit distance for $K_{2,t}$free graphs.
Ryan R. Martin*, Iowa State University
Tracy McKay, Iowa State University
(107405175)

Saturday October 15, 2011, 8:30 a.m.10:50 a.m.
Special Session on Local Commutative Algebra, II
Room 115, Burnett Hall Organizers: H. Ananthnarayan, University of NebraskaLincoln ahariharan2@math.unl.edu Inês B. Henriques, University of California Riverside Hamid Rahmati, Syracuse University

8:30 a.m.
Target elements and test ideals.
Melvin Hochster*, Department of Mathematics, University of Michigan, Ann Arbor
Wenliang Zhang, Department of Mathematics, University of Michigan, Ann Arbor
(107413215)

9:00 a.m.
$F$pure thresholds of hypersurfaces.
Bhargav Bhatt, University of Michigan
Anurag K Singh*, University of Utah
(107413200)

9:30 a.m.
The weak Lefschetz property for monomial complete intersections in positive characteristic.
Andy Kustin, University of South Carolina
Adela Vraciu*, University of South Carolina
(107413163)

10:00 a.m.
Local cohomology and $G$modules.
Emily E Witt*, University of Minnesota
(107413286)

10:30 a.m.
DG Ext and Yoneda Ext for DG modules.
Saeed Nasseh*, North Dakota State University
Sean SatherWagstaff, North Dakota State University
(107413146)

Saturday October 15, 2011, 9:00 a.m.10:50 a.m.
Special Session on Discrete Methods and Models in Biomathematics, II
Room 121, Burnett Hall Organizers: Dora Matache, University of NebraskaOmaha Jim Rogers, University of NebraskaOmaha Alan VelizCuba, University of NebraskaLincoln avelizcuba2@unl.edu

9:00 a.m.
Dynamical and structural analysis of a T cell survival network identifies novel candidate therapeutic targets for large granular lymphocyte leukemia.
Assieh Saadatpour*, Department of Mathematics, The Pennsylvania State University, University Park, PA
RuiSheng Wang, Department of Physics, The Pennsylvania State University, University Park, PA
Aijun Liao, Penn State Hershey Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA
Xin Liu, Penn State Hershey Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA
Thomas P Loughran, Penn State Hershey Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA
Istvan Albert, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA
Reka Albert, Department of Physics, The Pennsylvania State University, University Park, PA
(107492100)

9:30 a.m.
Testing for fragment bias in highthroughput sequencing experiments.
Valerie Hower*, University of California, Berkeley
Lior Pachter, University of California, Berkeley
Richard Starfield, University of California, Berkeley
(107492230)

10:00 a.m.
Reverse Engineering of Discrete Models Using Algebraic Geometry.
Alan VelizCuba*, University of NebraskaLincoln
(107414290)

10:30 a.m.
Using distance geometry to encode memory patterns in neuronal networks.
Carina Curto*, University of NebraskaLincoln
(107492298)

Saturday October 15, 2011, 9:00 a.m.10:50 a.m.
Special Session on Invariants in Knot Theory and Lowdimensional Topology, II
Room 109, Avery Hall Organizers: Mark Brittenham, University of NebraskaLincoln mbrittenham2@math.unl.edu Robert Todd, University of NebraskaOmaha rtodd@unomaha.edu

Saturday October 15, 2011, 9:00 a.m.10:45 a.m.
Special Session on Recent Directions in Number Theory, I
Room 106, Avery Hall Organizers: Alina Cojocaru, University of Illinois at Chicago Michael Zieve, University of Michigan zieve@umich.edu

Saturday October 15, 2011, 9:00 a.m.10:50 a.m.
Special Session on Recent Progress in Operator Algebras, II
Room 120, Burnett Hall Organizers: Allan P. Donsig, University of NebraskaLincoln adonsig1@unl.edu David R. Pitts, University of NebraskaLincoln

Saturday October 15, 2011, 11:05 a.m.11:55 a.m.
Invited Address
Questions about the reductions modulo primes of an elliptic curve.
Room 115, Avery Hall
Alina Cojocaru*, University of Illinois at Chicago and Mathematics Institute of the Romanian Academy
(10741102)

Saturday October 15, 2011, 1:25 p.m.2:15 p.m.
Invited Address
The happy marriage between arithmetic geometry and dynamical systems.
Room 115, Avery Hall
Michael Zieve*, University of Michigan
(10741103)

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Algebraic Geometry and Graded Commutative Algebra, II
Room 103, Burnett Hall Organizers: Susan Cooper, Central Michigan University s.cooper@cmich.edu Brian Harbourne, University of NebraskaLincoln

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Algorithmic and Geometric Properties of Groups and Semigroups, III
Room 119, Avery Hall Organizers: Susan Hermiller, University of NebraskaLincoln shermiller2@math.unl.edu John Meakin, University of NebraskaLincoln

2:30 p.m.
Spectral rigidity of automorphic orbits in free groups.
Ilya Kapovich*, University of Illinois at UrbanaChampaign
Mathieu Carette, Université catholique de Louvain
Stefano Francaviglia, Department of Mathematics, University of Bologna
Armando Martino, School of Mathematics, University of Southampton
(10742063)

3:00 p.m.
Towards the Second Integral Homology of $IA_3$.
Owen Baker*, McMaster University
(107420189)

3:30 p.m.
On the linearity of automorphism groups of rightangled Artin groups.
Hanna Bennett*, University of Michigan
(107420232)

4:00 p.m.
On restricting free factors in relatively free groups.
Lucas Sabalka*, Binghamton University
Dmytro Savchuk, Binghamton University
(107420141)

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Association Schemes and Related Topics, III
Room 108, Avery Hall Organizers: Sung Y. Song, Iowa State University sysong@iastate.edu Paul Terwilliger, University of Wisconsin Madison

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Asymptotic Behavior and Regularity for Nonlinear Evolution Equations, III
Room 204, Burnett Hall Organizers: Petronela Radu, University of NebraskaLincoln pradu@math.unl.edu Lorena Bociu, University of NebraskaLincoln

2:30 p.m.
On the Asymptotic Behavior of Strongly Damped Wave Equations.
Ryo Ikehata, Hiroshima University, Japan
Grozdena Todorova, University of TennesseeKnoxville, TN
Borislav Yordanov*, University of TennesseeKnoxville, TN
(107435292)

3:00 p.m.
Instability of steady states for damped nonlinear wave equations.
Stephen Pankavich*, United States Naval Academy
Petronela Radu, University of Nebraska, Lincoln
(107435125)

3:30 p.m.
Uniform stablization for semilinear system of elasticity with nonlinear Neumann boundary damping.
Jing Zhang*, University of Virginia
Irena Lasiecka, University of Virginia
(10743586)

4:00 p.m.
On a coupled system of incompressible fluid and nonlinear elasticity.
Lorena V Bociu*, NCSU
JeanPaul Zolesio, CNRSINLN
(107435130)

Saturday October 15, 2011, 2:30 p.m.3:50 p.m.
Special Session on Coding Theory, III
Room 110, Avery Hall Organizers: Christine Kelley, University of NebraskaLincoln ckelley2@math.unl.edu Judy Walker, University of NebraskaLincoln

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Commutative Algebra, III
Room 107, Burnett Hall Organizers: Christina EubanksTurner, University of Louisiana at Lafayette ceturner@louisiana.edu Aihua Li, Montclair State University

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Computational and Applied Mathematics, III
Room 124, Burnett Hall Organizers: Ludwig Kohaupt, Beuth University of Technology Berlin, Germany kohaupt@bhtberlin.de Yan Wu, Georgia Southern University

2:30 p.m.
Time scale choices on shape functionbased spatiotemporal interpolation method for evaluating population exposure to fine particulate matter pollution.
Lixin Li*, Department of Computer Sciences, Georgia Southern University
(107468168)

3:00 p.m.
Measuring the Impact of Time Scale Choice on Spatiotemporal Interpolation using Parallel Computing.
Derek Ratcliff*, Department of Computer Sciences, Georgia Southern University
Lixin Li, Department of Computer Sciences, Georgia Southern University
Robert Cook, Department of Computer Sciences, Georgia Southern University
(107468147)

3:30 p.m.
A piecewise linear maximum entropy method for calculating invariant measures of interval mappings.
J. Ding*, University of Southern Mississippi
N. Rhee, University of Missouri atKansas City
(10746509)

4:00 p.m.
Classification of gene regulatory networks.
Jonas Denissen*, Freie Universität Berlin
(107492216)

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Continuous and Numerical Analysis in the Control of PDE's, III
Room 203, Burnett Hall Organizers: George Avalos, University of NebraskaLincoln Mohammad Rammaha, University of NebraskaLincoln Daniel Toundykov, University of NebraskaLincoln dtoundykov2@unl.edu

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Discrete Methods and Models in Biomathematics, III
Room 121, Burnett Hall Organizers: Dora Matache, University of NebraskaOmaha Jim Rogers, University of NebraskaOmaha Alan VelizCuba, University of NebraskaLincoln avelizcuba2@unl.edu

2:30 p.m.
From network structure to neural code topology.
Vladimir Itskov*, UNL
(107492299)

3:00 p.m.
Macrolevel modeling of the response of C. elegans reproduction to chronic heat stress.
Patrick D McMullen*, Department of Chemical and Biological Engineering, Northwestern University
Erin Z Aprison, Department of Ecology and Evolution, University of Chicago
Peter B Winter, Department of Chemical and Biological Engineering, Northwestern University
Luis AN Amaral, Department of Chemical and Biological Engineering, Northwestern University
Richard I Morimoto, Department of Molecular Biosciences, Northwestern University
Ilya Ruvinsky, Department of Ecology and Evolution, University of Chicago
(107400329)

3:30 p.m.
Boolean Model of Budding Yeast Cell Cycle.
Robert Todd*, University of Nebraska at Omaha
Tomas Helikar, University of Nebraska at Omaha
(107492259)

4:00 p.m.
The Cell Collective: A collaborative modeling platform for biological processes.
Tomas Helikar*, University of NebraskaOmaha
(107492310)

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Dynamic Systems on Time Scales with Applications, III
Room 118, Burnett Hall Organizers: Lynn Erbe, University of NebraskaLincoln lerbe@math.unl.edu Allan Peterson, University of NebraskaLincoln

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Dynamical Systems and Operator Algebras, III
Room 119, Burnett Hall Organizers: Lewis Bowen, Texas A&M University lpbowen@math.tamu.edu David Kerr, Texas A&M University

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Extremal and Probabilistic Combinatorics, III
Room 118, Avery Hall Organizers: Stephen Hartke, University of NebraskaLincoln hartke@math.unl.edu Jamie Radcliffe, University of NebraskaLincoln

2:30 p.m.
Degree Ramsey numbers of doublestars.
William B. Kinnersley*, University of Illinois at UrbanaChampaign
Kevin G. Milans, University of South Carolina
Douglas B. West, University of Illinois at UrbanaChampaign
(107405302)

3:00 p.m.
AntiRamsey number of matchings in hypergraphs.
Michael Young*, Iowa State University
Lale Ozkahya, Iowa State University
(107405159)

3:30 p.m.
$\delta(G)$Size Rainbow Matchings in Properly EdgeColored Graphs.
Jennifer Diemunsch, University of Colorado Denver
Michael Ferrara, University of Colorado Denver
Casey Moffatt, University of Colorado Denver
Florian Pfender, University of Rostock
Paul S Wenger*, University of Colorado Denver
(107405155)

4:00 p.m.
Large Rainbow Matchings in Graphs.
A. Kostochka, University of Illinois at Urbana Champaign
M. Yancey*, University of Illinois at Urbana Champaign
(107405278)

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Invariants in Knot Theory and Lowdimensional Topology, III
Room 109, Avery Hall Organizers: Mark Brittenham, University of NebraskaLincoln mbrittenham2@math.unl.edu Robert Todd, University of NebraskaOmaha rtodd@unomaha.edu

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Local Commutative Algebra, III
Room 115, Burnett Hall Organizers: H. Ananthnarayan, University of NebraskaLincoln ahariharan2@math.unl.edu Inês B. Henriques, University of California Riverside Hamid Rahmati, Syracuse University

2:30 p.m.
The bigraded structure of Symmetric Algebras with applications to Rees rings.
Andrew R. Kustin*, University of South Carolina
Claudia Polini, University of Notre Dame
Bernd Ulrich, Purdue University
(10741389)

3:00 p.m.
Rees algebras of squarefree monomial ideals.
Louiza Fouli*, New Mexico State University
KueiNuan Lin, University of California, Riverside
(107413154)

3:30 p.m.
On the CohenMacaulayness of the conormal module of an ideal.
Paolo Mantero*, Purdue Univeristy
Yu Xie, University of Notre Dame
(10741308)

4:00 p.m.
Connected sums of simplicial complexes.
W. Frank Moore*, Wake Forest University
Tomoo Matsumura, KAIST
(107413327)

Saturday October 15, 2011, 2:30 p.m.4:15 p.m.
Special Session on Matrices and Graphs, III
Room 112, Avery Hall Organizers: InJae Kim, Minnesota State University injae.kim@mnsu.edu Adam Berliner, St. Olaf College Leslie Hogben, Iowa State University Bryan Shader, University of Wyoming

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Quantum Groups and Representation Theory, III
Room 111, Avery Hall Organizers: Jonathan Kujawa, University of Oklahoma kujawa@ou.edu Natasha Rozhkovskaya, Kansas State University

2:30 p.m.
Deformed Enveloping Algebras.
Yorck Sommerhäuser*, University of South Alabama
(107416320)

3:00 p.m.
Tensor product varieties, perverse sheaves and stability conditions.
Yiqiang Li*, SUNY, Buffalo
(10741627)

3:30 p.m.
Geometric approach to Hall algebra of representations of Quivers over local ring.
Zhaobing Fan*, Kansas State University
(107413115)

4:00 p.m.
Crystal bases for the quantum queer superalgebra and semistandard decomposition tableaux.
Dimitar Grantcharov*, University of Texas at Arlington
Ji Hye Jung, Seoul National University
SeokJin Kang, Seoul National University
Masaki Kashiwara, Kyoto University
Myungho Kim, Seoul National University
(107417139)

Saturday October 15, 2011, 2:30 p.m.4:15 p.m.
Special Session on Recent Directions in Number Theory, II
Room 106, Avery Hall Organizers: Alina Cojocaru, University of Illinois at Chicago Michael Zieve, University of Michigan zieve@umich.edu

Saturday October 15, 2011, 2:30 p.m.4:20 p.m.
Special Session on Recent Progress in Operator Algebras, III
Room 120, Burnett Hall Organizers: Allan P. Donsig, University of NebraskaLincoln adonsig1@unl.edu David R. Pitts, University of NebraskaLincoln

Saturday October 15, 2011, 3:00 p.m.4:25 p.m.
Session for Contributed Papers
Room 19, Avery Hall

Saturday October 15, 2011, 4:40 p.m.5:30 p.m.
Erdős Memorial Lecture
Recovering the unseen: Some recent advances in lowrank matrix reconstruction.
Union Ballroom, Student Union Building
Emmanuel Candes*, Stanford University
(10744904)

Saturday October 15, 2011, 5:30 p.m.6:30 p.m.
Erd\Hos Reception
Union Centennial Room, Student Union Building
Sunday October 16, 2011

Sunday October 16, 2011, 8:00 a.m.11:50 a.m.
Special Session on Algebraic Geometry and Graded Commutative Algebra, III
Room 103, Burnett Hall Organizers: Susan Cooper, Central Michigan University s.cooper@cmich.edu Brian Harbourne, University of NebraskaLincoln

8:00 a.m.
A theorem in representation theory for DG algebras, with an application to a question of Vasconcelos.
Sean SatherWagstaff*, North Dakota State University
Saeed Nasseh, North Dakota State University
(10741376)

8:30 a.m.
Generalizing the Borel condition.
Christopher Francisco*, Oklahoma State University
Jeffrey Mermin, Oklahoma State University
Jay Schweig, University of Kansas
(10741387)

9:00 a.m.
Regularity of $(n2)$plane arrangements in $\mathbb{P}^n$ with a complete bipartite incidence graph.
Douglas A Torrance*, University of Idaho
Zach Teitler, Boise State University
(107414238)

9:30 a.m.
Projective Monomial Curves in $\mathbb{P}^3$.
Leslie G. Roberts*, Queen's University, Kingston, Ontario
Ping Li, Department of Mathematics, Queen's University, Kingston, ON
(107414152)

10:00 a.m.
Containment Problem for Points on a Reducible Conic in $\mathbb{P}^2$.
Mike Janssen*, University of NebraskaLincoln
(107414143)

10:30 a.m.
Resolutions of monomial ideals using simplicial trees.
Sara Faridi*, Dalhousie University, Halifax, NS, Canada
(107413161)

11:00 a.m.
Monomials as sums of powers.
Enrico Carlini*, Politecnico di Torino
Maria Virginia Catalisano, Universita' di Genova
Anthony V Geramita, Queen's University
(10741384)

11:30 a.m.
Monomials as sums of powers  Part II.
Mats Boij, KTH, Stockholm, Sweden
Enrico Carlini, Politecnico di Torino
Maria Virginia Catalisano, Universita' di Genova
Anthony V. Geramita*, Queen's University (Kingston), Universita' di Genova
(107414192)

Sunday October 16, 2011, 8:00 a.m.11:20 a.m.
Special Session on Algorithmic and Geometric Properties of Groups and Semigroups, IV
Room 119, Avery Hall Organizers: Susan Hermiller, University of NebraskaLincoln shermiller2@math.unl.edu John Meakin, University of NebraskaLincoln

8:00 a.m.
Poset cohomology, Leray numbers and the global dimension of left regular bands.
Stuart W Margolis, BarIlan University
Franco Saliola, University of Quebec at Montreal
Benjamin Steinberg*, City College of New York
(10742061)

8:30 a.m.
Promotion maps for group actions.
Max Forester*, University of Oklahoma
(107455282)

9:00 a.m.
Ends of Semigroups.
Vesna Kilibarda*, Indiana University Northwest
Simon Craik, University of St Andrews
Robert D. Gray, University of St Andrews
Victor Maltcev, University of St Andrews
James D. Mitchell, University of St Andrews
Nik Ruskuc, University of St Andrews
(107420120)

9:30 a.m.
Centralizers of finite subgroups of the mapping class group and almost fixed points in the curve complex.
Hao Liang*, University of Illinois at Chicago
(107420127)

10:00 a.m.
$\mathbb{Z}^n$free groups are CAT(0).
Inna Bumagin*, Carleton University
(107420223)

10:30 a.m.
A class of metabelian automaton groups.
David McCune*, University of NebraskaLincoln
(107420264)

11:00 a.m.
On nary adding machines and solvable groups.
Said N. Sidki*, Universidade de Brasilia
(10742085)

Sunday October 16, 2011, 8:00 a.m.11:50 a.m.
Special Session on Association Schemes and Related Topics, IV
Room 108, Avery Hall Organizers: Sung Y. Song, Iowa State University sysong@iastate.edu Paul Terwilliger, University of Wisconsin Madison

Sunday October 16, 2011, 8:00 a.m.8:50 a.m.
Special Session on Asymptotic Behavior and Regularity for Nonlinear Evolution Equations, IV
Room 204, Burnett Hall Organizers: Petronela Radu, University of NebraskaLincoln pradu@math.unl.edu Lorena Bociu, University of NebraskaLincoln

Sunday October 16, 2011, 8:00 a.m.10:20 a.m.
Special Session on Commutative Algebra, IV
Room 107, Burnett Hall Organizers: Christina EubanksTurner, University of Louisiana at Lafayette ceturner@louisiana.edu Aihua Li, Montclair State University

8:00 a.m.
Wild Hypersurfaces.
Andrew Crabbe, Philadelphia PA
Graham J. Leuschke*, Syracuse University
(107413240)

8:30 a.m.
Annihilators of Local Cohomology Modules.
Laura R. Lynch*, College of Coastal Georgia
(107413313)

9:00 a.m.
An Algorithm for Computing Elasticities of Block Monoids.
Karl Kattchee*, University of WisconsinLa Crosse
Trever Hallock, University of WisconsinLa Crosse
(107413211)

9:30 a.m.
On Augmented Graded Rings.
Mashhoor A. Refai*, Professor/vice president for academic affairs,princess sumaya university for technology,AmmanJordan
(10741333)

10:00 a.m.
Strong and weak finitely valuative domains.
PaulJean Cahen*, AixMarseille Université
David E Dobbs, University of Tennessee, Knoxville
Thomas G Lucas, University of North Carolina Charlotte
(107413212)

Sunday October 16, 2011, 8:00 a.m.11:20 a.m.
Special Session on Dynamic Systems on Time Scales with Applications, IV
Room 118, Burnett Hall Organizers: Lynn Erbe, University of NebraskaLincoln lerbe@math.unl.edu Allan Peterson, University of NebraskaLincoln

8:00 a.m.
Multiple Fixed Point Theorems Utilizing Operators and Functionals of LeggettWilliams Type.
Rich Avery*, Dakota State University
(107447280)

8:30 a.m.
HyersUlam stability of secondorder linear dynamic equations on time scales.
Douglas R Anderson*, Concordia College Moorhead
(10743425)

9:00 a.m.
Necessary and sufficient conditions for uniform stability in volterra systems of integrodynamic equations on time scale.
Youssef Naim Raffoul*, University of Dayton
(10743765)

9:30 a.m.
Oscillation results for second order nonlinear dynamic equaations on time scales.
Lynn Erbe*, University of Nebraska, Lincoln, Nebraska
Allan Peterson, University of Nebraska, Lincoln, Nebraska
Baoguo Jia, Zhongshan University
(107439249)

10:00 a.m.
Green's Functions for Discrete and Continuous Fractional BVPs.
Christopher S. Goodrich*, University of NebraskaLincoln
(107434104)

10:30 a.m.
Nabla Laplace Transforms and Fractional Calculus.
Kevin A Ahrendt*, University of NebraskaLincoln
Mike Holm, University of NebraskaLincoln
Lucas Castle, Lamar University
Kathryn Yochman, RoseHulman Institute of Technology
(107434243)

11:00 a.m.
On the number of generalized zeros of solutions of a second order dynamic equation on a time scale.
Lynn Erbe, University of NebraskaLincoln
Gro Hovhannisyan, Kent StateStark
Allan Peterson*, University of NebraskaLincoln
(107434250)

Sunday October 16, 2011, 8:00 a.m.10:45 a.m.
Special Session on Dynamical Systems and Operator Algebras, IV
Room 119, Burnett Hall Organizers: Lewis Bowen, Texas A&M University lpbowen@math.tamu.edu David Kerr, Texas A&M University

Sunday October 16, 2011, 8:00 a.m.11:20 a.m.
Special Session on Extremal and Probabilistic Combinatorics, IV
Room 118, Avery Hall Organizers: Stephen Hartke, University of NebraskaLincoln hartke@math.unl.edu Jamie Radcliffe, University of NebraskaLincoln

8:00 a.m.
Spanning trees of shifted simplicial complexes.
Caroline J Klivans, University of Chicago
Art M Duval, University of Texas, El Paso
Jeremy L Martin*, University of Kansas
(107405217)

8:30 a.m.
Combinatorial Proofs of Some Chromatic Polynomial Constraints.
Rebecca I. Swanson*, Nebraska Wesleyan University
(107405277)

9:00 a.m.
On the Chromatic Thresholds of Hypergraphs.
J Balogh, University of Illinois at UrbanaChampaign
J Butterfield*, University of Illinois at UrbanaChampaign
P Hu, University of Illinois at UrbanaChampaign
J Lenz, University of Illinois at Chicago
D Mubayi, University of Illinois at Chicago
(107405255)

10:00 a.m.
Counting graph homomorphisms.
David Galvin*, University of Notre Dame
(10740562)

10:30 a.m.
Independent sets in graphs with given minimum degree.
Jonathan Cutler*, Montclair State University
James Alexander, Montclair State University
Tim Mink, Montclair State University
(107405183)

11:00 a.m.
Spectra of Hypergraphs.
Joshua N Cooper*, University of South Carolina
Aaron Dutle, University of South Carolina
(107405287)

Sunday October 16, 2011, 8:00 a.m.10:50 a.m.
Special Session on Matrices and Graphs, IV
Room 112, Avery Hall Organizers: InJae Kim, Minnesota State University injae.kim@mnsu.edu Adam Berliner, St. Olaf College Leslie Hogben, Iowa State University Bryan Shader, University of Wyoming

8:00 a.m.
The principal rank characteristic sequence of a real symmetric matrix.
Richard Brualdi, University of WisconsinMadison
Louis Deaett*, Quinnipiac University
Dale Olesky, University of Victoria
Pauline van den Driessche, University of Victoria
(107415326)

8:30 a.m.
Patterns of Alternating Sign Matrices.
Richard A Brualdi, University of Wisconsin
Kathleen P Kiernan, University of Wisconsin
Seth A Meyer*, University of Wisconsin
Michael W Schroeder, Marshall University
(107415297)

9:00 a.m.
Cyclic Matching Sequencibility of Graphs.
Michael W Schroeder*, Marshall University
Richard A Brualdi, University of Wisconsin
Kathleen P Kiernan, University of Wisconsin
Seth A Meyer, University of Wisconsin
(107405312)

9:30 a.m.
Acyclic matrices with few distinct and few multiple eigenvalues.
Reshmi Nair*, University of Wyoming
Bryan Shader, University of Wyoming
(107405137)

10:00 a.m.
Eventually reducible matrices.
Ulrica Wilson*, Morehouse College
Leslie Hogben, Iowa State University
(107415102)

10:30 a.m.
The NilpotentCentralizer method.
Colin M Garnett*, The University of Wyoming
(10741548)

Sunday October 16, 2011, 8:00 a.m.11:45 a.m.
Special Session on Quantum Groups and Representation Theory, IV
Room 111, Avery Hall Organizers: Jonathan Kujawa, University of Oklahoma kujawa@ou.edu Natasha Rozhkovskaya, Kansas State University

8:00 a.m.
Calculating finite group cohomology with Kostant partition functions.
Cornelius Pillen*, Department of Mathematics and Statistics, University of South Alabama
(107420226)

9:00 a.m.
Universal weight functions of quantum affine algebras.
Alexander Shapiro*, UC Berkeley
(107481210)

9:30 a.m.
Whittaker categories for Lie superalgebras.
Irfan Bagci, University of CaliforniaRiverside
Konstantina Christodoulopoulou, University of Connecticut
Emilie Wiesner*, Ithaca College
(107417309)

10:00 a.m.
Finite $W$superalgebras for queer Lie superalgebras and higher Sergeev duality.
Lei Zhao*, University of Oklahoma
(10741639)

10:30 a.m.
The FRTConstruction via Quantum Affine Algebras and Smash Products.
Garrett Johnson*, North Carolina State University
Chris Nowlin, University of California, Santa Barbara
(107417246)

11:00 a.m.
Some filtration results for Weyl modules.
Brian J. Parshall*, University of Virginia
(107420206)

Sunday October 16, 2011, 8:00 a.m.11:45 a.m.
Special Session on Recent Directions in Number Theory, III
Room 106, Avery Hall Organizers: Alina Cojocaru, University of Illinois at Chicago Michael Zieve, University of Michigan zieve@umich.edu

8:00 a.m.
Nonabelian CohenLenstra Heuristics.
Nigel Boston*, University of Wisconsin  Madison
(10741174)

9:00 a.m.
Asymptotically good families of codes, curves, graphs, number fields, and 3manifolds.
Farshid Hajir*, University of Massachusetts, Amherst
(107411187)

10:00 a.m.
Integral Division Points on Curves.
David Grant*, Department of Mathematics, University of Colorado at Boulder
SuIon Ih, Department of Mathematics, University of Colorado at Boulder
(107411205)

11:00 a.m.
A conjecture of LangTrotter type for abelian surfaces.
Jeff Achter*, Colorado Stae University
(107411188)

Sunday October 16, 2011, 8:30 a.m.10:50 a.m.
Special Session on Coding Theory, IV
Room 110, Avery Hall Organizers: Christine Kelley, University of NebraskaLincoln ckelley2@math.unl.edu Judy Walker, University of NebraskaLincoln

8:30 a.m.
On codes from finite projective plane.
Adonus L. Madison, Lane College
Junhua Wu*, Lane College
(107400336)

9:00 a.m.
ePerfect Codes.
Francis N. Castro, Department of Mathematics, University of Puerto Rico, Rio Piedras Campus
Heeralal Janwa*, Department of Mathematics, University of Puerto Rico, Rio Piedras Campus
Gary L. Mullen, Department of Mathematics, The Pennsylvania State University,
Ivelisse M. Rubio, Department of Computer Science, University of Puerto Rico, Rio Piedras Campus
(107494328)

9:30 a.m.
Optimal Distance Profiles of Binary SelfDual Type II Codes.
Finley J. Freibert*, University of Louisville
JonLark Kim, University of Louisville
(107494112)

10:00 a.m.
$\mathbb{F}_{p}$Codes, theta series, and the Hamming weight MacWilliams identity.
David Keyes*, University of Colorado, Boulder
(10741130)

10:30 a.m.
A matrix approach to Group Convolutional Codes.
Sergio R. LópezPermouth, Ohio University
Steve Szabo*, Eastern Kentucky University
(107416279)

Sunday October 16, 2011, 8:30 a.m.10:50 a.m.
Special Session on Invariants in Knot Theory and Lowdimensional Topology, IV
Room 109, Avery Hall Organizers: Mark Brittenham, University of NebraskaLincoln mbrittenham2@math.unl.edu Robert Todd, University of NebraskaOmaha rtodd@unomaha.edu

8:30 a.m.
On the AJ Conjecture.
Thang LE*, Georgia Institute of Technology
Anh TRAN, Georgia Institute of Technology
(10745769)

9:00 a.m.
Generalized Alexander Polynomials for Virtual Knots.
Alissa S Crans*, Loyola Marymount University
Allison Henrich, Seattle University
Sam Nelson, Claremont McKenna College
(107457323)

9:30 a.m.
Twisted Virtual Biracks.
Sam Nelson*, Claremont McKenna College
(107457121)

10:00 a.m.
Smoothed Parity Invariants.
Heather A Dye*, McKendree University
(10745792)

10:30 a.m.
Projective representations of the mapping class Groups of surfaces coming from extended TQFT.
Charles D Frohman*, The University of Iowa
Michael C Fitzpatrick, The University of Iowa
Joann KaniaBartoszynska, National Science Foundation
(10745768)

Sunday October 16, 2011, 9:00 a.m.10:50 a.m.
Special Session on Discrete Methods and Models in Biomathematics, IV
Room 121, Burnett Hall Organizers: Dora Matache, University of NebraskaOmaha Jim Rogers, University of NebraskaOmaha Alan VelizCuba, University of NebraskaLincoln avelizcuba2@unl.edu

Sunday October 16, 2011, 9:00 a.m.11:50 a.m.
Special Session on Local Commutative Algebra, IV
Room 115, Burnett Hall Organizers: H. Ananthnarayan, University of NebraskaLincoln ahariharan2@math.unl.edu Inês B. Henriques, University of California Riverside Hamid Rahmati, Syracuse University

Sunday October 16, 2011, 9:00 a.m.11:50 a.m.
Special Session on Recent Progress in Operator Algebras, IV
Room 120, Burnett Hall Organizers: Allan P. Donsig, University of NebraskaLincoln adonsig1@unl.edu David R. Pitts, University of NebraskaLincoln

Sunday October 16, 2011, 9:00 a.m.11:40 a.m.
Session for Contributed Papers
Room 19, Avery Hall

9:00 a.m.
FrobeniusSchur indicators of quantum groups and symmetric tensor categories.
Miodrag Cristian Iovanov*, University of Southern California and University of Bucharest
Susan Montgomery, University of Southern California
(10742022)

9:15 a.m.
Hereditary category algebras of finite EI categories.
Liping Li*, School of Mathematics, University of Minnesota
(10741626)

9:30 a.m.
Hyperbolic cluster algebras.
Ibrahim Abdou Saleh*, Kansas State University, Manhattan Ks
(107405138)

9:45 a.m.
On the range of possible integrities of graphs G(n,k).
Mustafa Atici*, Western Kentcuky University
Claus Ernst, Western Kentucky University
(10740567)

10:00 a.m.
On congruence relations of graphs.
Evgenia Karmanova*, Saratov State University named after N.G. Chernyshevsky, Russian Federation
(10740014)

10:15 a.m.
Attractors of dynamic systems associated with paths and cycles.
Anastasiya Vlasova*, Saratov State University named after N.G. Chernyshevsky, Russian Federation
(10740515)

10:30 a.m.
On certain quadratic irrational cosines and transcendence of the angle over $\pi$.
Iraj Kalantari, Western Illinois University
Mojtaba Moniri*, Western Illinois University
(10741124)

10:45 a.m.
New type of multiplicative relations of Gauss sums.
H Kim*, Southern University at New Orleans
(107411289)

11:00 a.m.
Dynamics of continuous and discrete models in systems biology.
Alan VelizCuba*, University of NebraskaLincoln
Joseph Arthur, North Carolina State University
Laura Hochstetler, Asbury University
Victoria Klomps, Northwestern College
Erikka Korpi, University of WisconsinRiver Falls
(10749240)

11:15 a.m.
Binary Normal Network Space Is Connected.
Devin R. Bickner*, Iowa State University
(107492201)

11:30 a.m.
On JordanGrothendieck type theorem for dual characterization of real locally C*algebras.
Alexander A. Katz, St. John's University, NY, USA
Oleg Friedman*, UNISA, RSA and Touro College/LCM, Kew Gardens Hills, NY, USA
(107446126)
Inquiries: meet@ams.org

