
AMS Sectional Meeting Full Program
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2011 Spring Central Section Meeting
Iowa City, IA, March 1820, 2011 (Friday  Sunday)
Meeting #1069
Associate secretaries:
Georgia Benkart, AMS benkart@math.wisc.edu
Friday March 18, 2011

Friday March 18, 2011, 12:30 p.m.4:30 p.m.
Book Sale and Exhibit
Room 243, Iowa Memorial Union Ballroom

Friday March 18, 2011, 12:30 p.m.4:30 p.m.
Meeting Registration
Foyer to Ballroom, Iowa Memorial Union Ballroom

Friday March 18, 2011, 1:30 p.m.2:20 p.m.
Invited Address
Gaps in dimer systems and beyond
Room 243, Iowa Memorial Union Ballroom
Mihai Ciucu*, Indiana University
(10690501)

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Algebraic Combinatorics I
Rm 345 Northwestern, Iowa Memorial Union Bldg Organizers: Mihai Ciucu, Indiana University mciucu@indiana.edu

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Algebraic KTheory and Homotopy Theory I
Rm 110, MacLean Classroom Bldg Organizers: Teena Gerhardt, Michigan State University teena@math.msu.edu Daniel Ramras, New Mexico State University

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Analytic and Algebraic Number Theory I
Rm 337 Penn State, Iowa Memorial Union Bldg Organizers: Ling Long, Iowa State University linglong@iastate.edu Yangbo Ye, University of Iowa yey@iowa.uiowa.edu

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Commutative Ring Theory I
Rm 105, MacLean Classroom Bldg Organizers: Daniel D. Anderson, University of Iowa dananderson@uiowa.edu David F. Anderson, University of Tennessee Knoxville anderson@math.utk.edu

2:30 p.m.
On the total graph of a commutative ring without the zero element.
David F Anderson, The Univ of Tennesee, Dept of Math, Knoxville, USA
Ayman R Badawi*, American University of Sharjah, Dept of Mathe., Sharjah, UAE
(10691357)

3:00 p.m.
A universal survival ring of continuous functions which is not a universal lyingover ring, I.
David E. Dobbs*, University of Tennessee, Knoxville
Ronald Levy, George Mason University
Jay Shapiro, George Mason University
(10691392)

3:30 p.m.
A universal survival ring of continuous functions which is not a universal lyingover ring.
David E. Dobbs, University of Tennessee
Ronald Levy, George Mason University
Jay Shapiro*, George Mason University
(106913100)

4:00 p.m.
Nakayama's Lemma for Ext and ascent for module structures.
Ben J. Anderson*, North Dakota State University
Jim Coykendall, North Dakota State University
Sean SatherWagstaff, North Dakota State University
(106913251)

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Geometric Commutative Algebra and Applications I
Rm 346 Indiana, Iowa Memorial Union Bldg Organizers: David Anderson, University of Washington dandersn@math.washington.edu Julianna Tymoczko, University of Iowa tymoczko@math.uiowa.edu

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Graph Theory I
Rm 348 Illinois, Iowa Memorial Union Bldg Organizers: Maria Axenovich, Iowa State University axenovic@iastate.edu Lale Ozkahya, Iowa State University Michael Young, Iowa State University

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Modelling, Analysis and Simulation in Contact Mechanics I
Rm 210, MacLean Classroom Bldg Organizers: Weimin Han, University of Iowa whan@math.uiowa.edu Mircea Sofonea, University of Perpignan sofonea@univperp.fr

2:30 p.m.
Recent Results on Dynamic Contact of a Gao Beam.
Meir Shillor*, Oakland University, Michigan
(106974140)

3:00 p.m.
A contact problem for a Gao beam with a crack.
Kenneth L. Kuttler*, Brigham Young University
Purcell, Oakland University
Shillor, Oakland University
(10697484)

3:30 p.m.
Vibrations of a Gao beam with two stops.
Jeongho Ahn*, Arkansas State University
(106965220)

4:00 p.m.
Dynamic contact problems for von Kármán and ReissnerMindlin plates.
Igor Bock*, Department of Mathematics FEI, Slovak University of Technology Bratislava, Slovak Republic
Jiri Jarusek, Mathematical Institute, Academy of Sciences of the Czech Republic
(106935178)

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Numerical Analysis and Scientific Computing I
Rm 213, MacLean Classroom Bldg Organizers: Kendall E. Atkinson, University of Iowa Bruce P. Ayati, University of Iowa Weimin Han, University of Iowa Laurent O. Jay, University of Iowa ljay@math.uiowa.edu Suely Oliveira, University of Iowa David Stewart, University of Iowa

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Recent Developments in Nonlinear Evolution Equations I
Rm 218, MacLean Classroom Bldg Organizers: Yinbin Deng, Central China Normal University ybdeng@mail.ccnu.edu.cn Yong Yu, University of Iowa yongyu@uiowa.edu Yi Li, University of Iowa yili@uiowa.edu Shuangjie Peng, Central China Normal University sjpeng@mail.ccnu.edu.cn

2:30 p.m.
Ansatz solutions to a problem of mean curvature and Newtonian potential.
Xiaofeng Ren*, George Washington University
(106935319)

3:00 p.m.
Gamma Convergence of MCSH theory.
Yong YU*, University of Iowa
(106935359)

3:30 p.m.
Multiplicity of solutions for the plasma problem in two dimensions.
Daomin Cao, Institute of Applied Mathematics, Chinese Academy of Sciences, Beijing 100190, P.R. China
Shuangjie Peng*, School of Mathematics and Statistics, Central China Normal University, P.R.China
Shusen Yan, School of Mathematics,Statistics and Computer Sciences,The University of New England
(10693596)

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Representations of Algebras I
Rm 343 Ohio State, Iowa Memorial Union Bldg Organizers: Frauke Bleher, University of Iowa fbleher@divms.uiowa.edu Calin Chindris, University of Missouri chindrisc@missouri.edu

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Stochastic Processes with Applications to Mathematical Finance I
Rm 205, MacLean Classroom Bldg Organizers: Igor Cialenco, Illinois Institute of Technology cialenco@iit.edu José E. FigueroaLópez, Purdue University

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Topological Problems in Molecular Biology I
Rm 335 Iowa, Iowa Memorial Union Bldg Organizers: Isabel K. Darcy, University of Iowa idarcy@math.uiowa.edu Stephen D. Levene, University of Texas at Dallas Jonathan Simon, University of Iowa

2:30 p.m.
The Classification of Rational Subtangle Replacements, with Applications to Complex Nucleoprotein Assemblies.
Dorothy Buck*, Imperial College London
Kenneth L. Baker, University of Miami
(106957274)

3:00 p.m.
Rational Subtangle Replacements between Rational Tangles.
Kenneth L. Baker*, University of Miami
Dorothy Buck, Imperial College London
(106957275)

3:30 p.m.
The nullification number for knots and links.
Anthony G Montemayor*, Dept. of Math. and Comp. Sci., WKU
Claus Ernst, Dept. of Math. and Comp. Sci., WKU
(106992324)

4:00 p.m.
DNA unlinking by Xer recombination.
Mariel Vazquez*, Math Department, San Francisco State University
(106992356)

Friday March 18, 2011, 2:30 p.m.4:20 p.m.
Special Session on Universal Algebra and Order I
Rm 113, MacLean Classroom Bldg Organizers: John Snow, Concordia University John.Snow@cune.edu Jeremy Alm, Illinois College Clifford Bergman, Iowa State University Kristi Meyer, Wisconsin Lutheran College

2:30 p.m.
Do all the Ramsey algebras exist?
Roger D. Maddux*, Iowa State University
(10690629)

3:00 p.m.
Abelian Quasi Ordered Groups.
Elijah James Stines*, Iowa state University
(10690644)

3:30 p.m.
Manysorted and singlesorted algebras.
Anna Mucha, Faculty of Mathematics and Information Sciences, Warsaw University of Technology
Anna Romanowska, Faculty of Mathematics and Information Sciences, Warsaw University of Technology
Jonathan D.H. Smith*, Department of Mathematics, Iowa State University
(10690830)

4:00 p.m.
Lyndon's Algebra: a study of equational complexity and the finite algebra membership problem.
Marcel G. Jackson, LaTrobe University
George F Mcnulty*, University of South Carolina
(106908288)

Friday March 18, 2011, 3:00 p.m.4:20 p.m.
Special Session on Thin Position I
Rm 114, MacLean Classroom Bldg Organizers: Jesse Johnson, Oklahoma State University Maggie Tomova, University of Iowa mtomova@math.uiowa.edu

Friday March 18, 2011, 4:30 p.m.5:20 p.m.
Invited Address
Open and Closed GromovWitten Invariants of Toric CalabiYau 3Folds
Room 243, Iowa Memorial Union Ballroom
ChiuChu Liu*, Columbia University
(10691404)

Friday March 18, 2011, 6:00 p.m.8:00 p.m.
Graduate Student Poster Session
Lucas / Dodge Room, Iowa Memorial Union Bldg
Saturday March 19, 2011

Saturday March 19, 2011, 7:30 a.m.4:00 p.m.
Book Sale and Exhibit
Room 243, Iowa Memorial Union Ballroom

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Algebraic Combinatorics II
Rm 345 Northwestern, Iowa Memorial Union Bldg Organizers: Mihai Ciucu, Indiana University mciucu@indiana.edu

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Algebraic KTheory and Homotopy Theory II
Rm 110, MacLean Classroom Bldg Organizers: Teena Gerhardt, Michigan State University teena@math.msu.edu Daniel Ramras, New Mexico State University

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Commutative Ring Theory II
Rm 105, MacLean Classroom Bldg Organizers: Daniel D. Anderson, University of Iowa dananderson@uiowa.edu David F. Anderson, University of Tennessee Knoxville anderson@math.utk.edu

8:00 a.m.
Intersections of valuation rings over projective surfaces.
Bruce Olberding*, New Mexico State University
(106913221)

8:30 a.m.
Properties of Ext for nonnoetherian modules.
Bethany Kubik*, North Dakota State University
Micah J Leamer, University of NebraskaLincoln
Sean SatherWagstaff, North Dakota State University
(106918225)

9:00 a.m.
Root extensions of subrings of quadratic number rings.
Peter Malcolmson*, Department of Mathematics, Wayne State University, Detroit, MI 48202
Frank Okoh, Department of Mathematics, Wayne State University, Detroit, MI 48202
(106913111)

9:30 a.m.
Transfer of Arithmeticallike Properties to Trivial Extensions.
Abdeslam Mimouni*, Department of Math.& Stat. KFUPM, Dhahran, 31261, Saudi Arabia
Mohammed Kabbour, Department of Mathematics, Faculty of Science and Technology of Fez, Box 2202, University S.M. Ben Abdellah Fez, Morocco
Najib Mahdou, Department of Mathematics, Faculty of Science and Technology of Fez, Box 2202, University S.M. Ben Abdellah Fez, Morocco
(10691315)

10:00 a.m.
On the annihilator idealbased zero divisor graph of a ring and the torsion graph of a module.
Sara Shirinkam*, K.N.Toosi University of Technology
Shaban Ghalandarzadeh, K.N.Toosi University of Technology
Parastoo Malakooti Rad, K.N.Toosi University of Technology
(106913173)

10:30 a.m.
Weak CohenKaplansky rings.
D. D. Anderson, The University of Iowa
Sangmin Chun*, Seoul National University
(10691327)

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Graph Theory II
Rm 348 Illinois, Iowa Memorial Union Bldg Organizers: Maria Axenovich, Iowa State University axenovic@iastate.edu Lale Ozkahya, Iowa State University Michael Young, Iowa State University

8:00 a.m.
On a class of colorcritical graphs and hypergraphs.
Alexandr Kostochka*, University of Illinois at UrbanaChampaign
(10690555)

8:30 a.m.
Isomorphfree generation of 2connected graphs with applications.
Derrick Stolee*, University of NebraskaLincoln
(10690546)

9:00 a.m.
Ramsey Functions for QuasiProgressions with Large Diameter.
Adam Jobson, University of Louisville
Andre Kezdy*, University of Louisville
Hunter Snevily, University of Idaho at Moscow, ID
Susan C. White, University of Louisville
(106905119)

9:30 a.m.
Longest cycles in graphs with given independence number and connectivity.
Suil O, University of Illinois at UrbanaChampaign
Douglas B. West, University of Illinois at UrbanaChampaign
Hehui Wu*, University of Illinois at UrbanaChampaign
(10690597)

10:00 a.m.
Counting homomorphisms.
Jonathan Cutler, Montclair State University
Andrew J Radcliffe*, University of NebraskaLincoln
(106905109)

10:30 a.m.
Cyclesaturated graphs with minimum number of edges.
Younjin Kim*, University of Illinois at UrbanaChampaign
Zoltan Furedi, University of Illinois at UrbanaChampaign
(106905145)

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on History of Mathematics I
Rm 349 Michigan State, Iowa Memorial Union Bldg Organizers: Colin McKinney, Bradley University cmckinney@bumail.bradley.edu

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Modelling, Analysis and Simulation in Contact Mechanics II
Rm 210, MacLean Classroom Bldg Organizers: Weimin Han, University of Iowa whan@math.uiowa.edu Mircea Sofonea, University of Perpignan sofonea@univperp.fr

8:00 a.m.
Historydependent Quasivariational Inequalities Arising in Contact Mechanics.
Mircea Sofonea*, University of Perpignan, France
(10697450)

8:30 a.m.
Numerical Analysis of Historydependent Quasivariational Inequalities with Applications in Contact Mechanics.
Kamran Kazmi*, University of Wisconsin Oshkosh
Mikael Barboteu, University of Perpignan
Weimin Han, University of Iowa
Mircea Sofonea, University of Perpignan
(106965153)

9:00 a.m.
Numerical Solution of a Quasistatic Frictional Contact Problem.
Mikaël Barboteu*, University of Perpignan, France.
(10697453)

9:30 a.m.
Historydependent Subdifferential Inclusions and Hemivariational Inequalities in Contact Mechanics.
Stanislaw Migorski*, Jagiellonian University, Faculty of Mathematics and Computer Science, Krakow, Poland
(106935184)

10:00 a.m.
Dynamic antiplane frictional contact problems  modeling and analysis.
Anna Ochal*, Jagiellonian University
(10693582)

10:30 a.m.
Analysis of a class of quasistatic Coulomb friction problems.
Marius Cocou*, Laboratoire de Mécanique et d'Acoustique C.N.R.S. and AixMarseille Université
(106974201)

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Nonlinear Partial Differential Equations I
Rm 221, MacLean Classroom Bldg Organizers: Hongjie Dong, Brown University Dong Li, University of Iowa Lihe Wang, University of Iowa lwang@math.uiowa.edu Xiaoyi Zhang, University of Iowa

8:00 a.m.
SuperLiouville Equations on Closed Riemann Surfaces.
Chunqin Zhou*, Shanghai Jiao Tong University
(106935198)

8:30 a.m.
$L^p$ estimates for higher order elliptic equations on Reifenberg flat domains.
SunSig Byun*, Seoul National University
Lihe Wang, University of Iowa
(106935197)

9:00 a.m.
Divergence Form Parabolic Equations On Noncylindrical Quasiconvex Domains.
Huilian Jia*, College of Science, Xi'An Jiaotong University, Xi'An, 710049, China
Lihe Wang, Department of Mathematics, University of Iowa, Iowa City, IA 52242, USA
(106935304)

9:30 a.m.
Secondorder parabolic nondivergence equations with small BMO coefficients in $R^n$.
Lihe Wang, University of Iowa, USA
Fengping Yao*, Department of Mathematics, Shanghai University, China
Shulin Zhou, School of Mathematics, Peking University, China
(106935312)

10:00 a.m.
The Holder continuity of solutions to the generalized pLaplacian type of parabolic equation.
Sukjung Hwang*, Iowa State University
(10693526)

10:30 a.m.
On a quasilinear system arising in the theory of superconductivity.
Gary M. Lieberman*, Iowa State University
XingBin Pan, East China Normal lUniversity
(10693567)

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Numerical Analysis and Scientific Computing IIA
Rm 213, MacLean Classroom Bldg Organizers: Kendall E. Atkinson, University of Iowa Bruce P. Ayati, University of Iowa Weimin Han, University of Iowa Laurent O. Jay, University of Iowa ljay@math.uiowa.edu Suely Oliveira, University of Iowa David Stewart, University of Iowa

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Numerical Analysis and Scientific Computing IIB
Rm 214, MacLean Classroom Bldg Organizers: Kendall E. Atkinson, University of Iowa Bruce P. Ayati, University of Iowa Weimin Han, University of Iowa Laurent O. Jay, University of Iowa ljay@math.uiowa.edu Suely Oliveira, University of Iowa David Stewart, University of Iowa

8:00 a.m.
Stiffness analysis of cardiac cell models.
Raymond J. Spiteri*, University of Saskatchewan
Megan E. Lewis, University of Saskatchewan
(10696542)

8:30 a.m.
A definition of stiffness for initial value problems for ODEs.
Laurent O. Jay*, The University of Iowa
Manuel Calvo, Universidad de Zaragoza, Spain
(10696572)

9:00 a.m.
A Class of Numerical Methods for Solving Mechanical Systems with Mixed Holonomic and Nonholonomic Constraints.
Scott J. Small*, University of Iowa
(106965342)

9:30 a.m.
Neutral Equations of Mixed Type.
Charles Lamb*, University of Kansas
Erik Van Vleck, University of Kansas
(10693440)

10:00 a.m.
Perturbation theory for the approximation of stability spectra by QR methods for sequences of linear operators on a Hilbert Space.
Mohamed Badawy*, University of Kansas
Erik Van Vleck, University of Kansas
(10696532)

10:30 a.m.
Numerical methods for Stochastic Differential Equations of Levy JumpDiffusion type.
Jing Shi*, Department of Mathematics, Wayne State University, Detroit, MI
(106965290)

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Recent Advances in Hyperbolic and Kinetic Problems I
Rm 217, MacLean Classroom Bldg Organizers: Tong Li, University of Iowa tli@divms.uiowa.edu Hailing Liu, Iowa State University

8:00 a.m.
Semihyperbolic patches of solutions to twodimensional compressible Euler systems.
Yuxi Zheng*, Yeshiva University
(10693531)

8:30 a.m.
Central Schemes for the Modified BuckleyLeverett Equation.
Ying Wang, Department of Mathematics, University of Minnesota
ChiuYen Kao*, Department of Mathematics, The Ohio State University
(106976362)

9:00 a.m.
On a Class of Nonlocal Dispersive Equations.
Hailiang Liu*, Iowa State University
(106935223)

9:30 a.m.
SemiDiscrete CentralUpwind Schemes for Elasticity in Heterogeneous Media.
Alexander Kurganov*, Tulane University
Michael Pollack, Tulane University
(106976295)

10:00 a.m.
Approximating High Frequency Waves with Gaussian Beams.
Nicolay Tanushev*, The University of Texas at Austin
(106935234)

10:30 a.m.
A level set approach for dilute noncollisional fluidparticle flows.
Hailiang Liu, Iowa State University
Zhongming Wang*, University of California San Diego
Rodney Fox, Iowa State University
(106965179)

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Representations of Algebras II
Rm 343 Ohio State, Iowa Memorial Union Bldg Organizers: Frauke Bleher, University of Iowa fbleher@divms.uiowa.edu Calin Chindris, University of Missouri chindrisc@missouri.edu

8:00 a.m.
Generic modules for string algebras.
Andrew Carroll, Northeastern University
Jerzy M Weyman*, Northeastern University
(106916332)

8:30 a.m.
Counting Subrepresentations of Quiver Representations.
Harm Derksen*, University of Michigan
(106916345)

9:00 a.m.
Small tree modules for quivers with one vertex.
Ryan Kinser*, University of Connecticut
(106916262)

9:30 a.m.
Generic Modules over Gentle String Algebras.
Andrew T. Carroll*, Northeastern University
(106916327)

10:00 a.m.
Symmetric quivers, invariant theory, and saturation theorems for the classical groups.
Steven V Sam*, Massachusetts Institute of Technology
(10691618)

10:30 a.m.
Categorification of the polynomial ring Z[x].
Radmila Sazdanovic*, University of Pennsylvania
Mikhail Khovanov, Columbia University
(106918257)

Saturday March 19, 2011, 8:00 a.m.10:50 a.m.
Special Session on Stochastic Processes with Applications to Mathematical Finance II
Rm 205, MacLean Classroom Bldg Organizers: Igor Cialenco, Illinois Institute of Technology cialenco@iit.edu José E. FigueroaLópez, Purdue University

8:00 a.m.
Application of Wavelets and Dynamical Systems Theory to Security Volatility.
Andrew Clark*, Thomson Reuters
(10693709)

8:30 a.m.
Multilevel Monte Carlo Algorithms for Highdimensional Option Pricing.
Ben Niu*, Department of Applied Mathematics, Illinois Institute of Technology
Fred Hickernell, Department of Applied Mathematics, Illinois Institute of Technology
(10696075)

9:00 a.m.
Pricing and Arbitrage in Markets with Transaction Costs.
Rodrigo Rodriguez*, Illinois Institute of Technology
Tomasz Bielecki, Illinois Institute of Technology
Igor Cialenco, Illinois Institute of Technology
(106960244)

9:30 a.m.
Pricing American Options without Smooth Pasting.
Arun Chockalingam*, Purdue University
Shaunak Dabadhghao, Purdue University
(106949281)

10:00 a.m.
Market crashes through the drawdown and its speed (Part I).
Hongzhong Zhang, Department of Statistics, Columbia University
Olympia Hadjiliadis*, Department of Mathematics, Brooklyn College and teh Graduate Center, C.U.N.Y.
(106960165)

10:30 a.m.
Market crashes through the drawdown and its speed (Part II).
Hongzhong Zhang*, Statistics Department, Columbia University
Olympia Hadjiliadis, Department of Mathematics, Brooklyn College and the Graduate Center, C.U.N.Y.
(106960166)

Saturday March 19, 2011, 8:30 a.m.10:50 a.m.
Special Session on Recent Developments in Schubert Calculus I
Rm 347 Minnesota, Iowa Memorial Union Bldg Organizers: Leonardo Mihalcea, Baylor University Leonardo_Mihalcea@baylor.edu

8:30 a.m.
Equivariant kSchur functions, homology of the affine Grassmannian and GromovWitten invariants of G/B.
Thomas Lam, University of Michigan
Mark Shimozono*, Virginia Polytechnic Institute and State University
(106914236)

9:00 a.m.
Local complete intersection Schubert varieties.
Alexander K. Woo*, Saint Olaf College
(106914339)

9:30 a.m.
Cohomology classes of torus orbit closures in Grassmannians.
Andrew Berget*, University of California
Alexander Fink, North Carolina State University
(106905181)

10:00 a.m.
A KostantMacdonald identity for special $SL_n$ orbits in complete quadrics.
Mahir Bilen Can*, Tulane University, New Orleans, LA
Michael Joyce, New Orleans, LA
(106914108)

10:30 a.m.
Gröbner bases and singularities of Schubert varieties.
Alexander Yong*, U. Illinois at UrbanaChampaign
(106905120)

Saturday March 19, 2011, 8:30 a.m.10:50 a.m.
Special Session on Universal Algebra and Order II
Rm 113, MacLean Classroom Bldg Organizers: John Snow, Concordia University John.Snow@cune.edu Jeremy Alm, Illinois College Clifford Bergman, Iowa State University Kristi Meyer, Wisconsin Lutheran College

8:30 a.m.
Subdirectly irreducible groupoids in a category investigated by Laver.
Matthew Smedberg*, Vanderbilt University
(10690886)

9:00 a.m.
Maximal $n$generated subdirect products.
Joel Berman*, University of Illinois at Chicago
(10690852)

9:30 a.m.
Locally finite varieties with $\langle R, S\rangle$irreducible sets of bounded size.
Keith A Kearnes*, University of Colorado, Boulder
Yingwei Li, Indiana University
(10690835)

10:00 a.m.
Quasiequations of finite unary algebras with $0$.
Jennifer Hyndman*, University of Northern British Columbia
(106908174)

10:30 a.m.
Ordered direct implicational basis of a finite closure system.
Kira Adaricheva*, Yeshiva University, New York
James B Nation, University of Hawaii at Manoa, Honolulu, HI
(10690689)

Saturday March 19, 2011, 9:00 a.m.10:50 a.m.
Special Session on Analytic and Algebraic Number Theory II
Rm 337 Penn State, Iowa Memorial Union Bldg Organizers: Ling Long, Iowa State University linglong@iastate.edu Yangbo Ye, University of Iowa yey@iowa.uiowa.edu

Saturday March 19, 2011, 9:00 a.m.10:50 a.m.
Special Session on Geometric Commutative Algebra and Applications II
Rm 346 Indiana, Iowa Memorial Union Bldg Organizers: David Anderson, University of Washington dandersn@math.washington.edu Julianna Tymoczko, University of Iowa tymoczko@math.uiowa.edu

Saturday March 19, 2011, 9:00 a.m.10:50 a.m.
Special Session on Global and Padic Representation Theory I
Rm 341 Purdue, Iowa Memorial Union Bldg Organizers: Muthukrishnan Krishnamurthy, University of Iowa mkrishna@math.uiowa.edu Philip Kutzco, University of Iowa philipkutzko@math.uiowa.edu Yangbo Ye, University of Iowa yey@math.uiowa.edu

Saturday March 19, 2011, 9:00 a.m.10:50 a.m.
Special Session on Spectral Theory I
Rm 118, MacLean Classroom Bldg Organizers: David Damanik, Rice University damanik@rice.edu Christian Remling, University of Oklahoma

8:30 a.m.
On essential selfadjointness for magnetic Schroedinger and Pauli operators.
Gheorghe Nenciu, Institute of Mathematics of the Romanian Academy, Bucharest, Romania
Irina Nenciu*, Dept. of Mathematics, UIC
(106946361)

9:00 a.m.
Wave equation with slowly decaying potential: asymptotics and wave operators.
Sergey Denisov*, UWMadison
(106935134)

9:30 a.m.
A new estimate on the indirect part of the Coulomb energy.
Rafael D. Benguria, Catholic University of Chile
Gonzalo Bley, Catholic University of Chile
Michael Loss*, Georgia Tech
(106981190)

10:00 a.m.
On the SimonSpencer Theorem.
Alexander Gordon*, UNC Charlotte
Jason Holt, USC Lancaster
Ari Laptev, Imperial College London
Stanislav Molchanov, UNC Charlotte
(106947293)

10:30 a.m.
Zerovelocity LiebRobinson bounds in the disordered xyspin chain.
Gunter Stolz*, University of Alabama at Birmingham
Robert Sims, University of Arizona
(106982133)

Saturday March 19, 2011, 9:00 a.m.10:50 a.m.
Special Session on Thin Position II
Rm 114, MacLean Classroom Bldg Organizers: Jesse Johnson, Oklahoma State University Maggie Tomova, University of Iowa mtomova@math.uiowa.edu

9:00 a.m.
Thin position of cable knots.
Alexander Zupan*, University of Iowa
(106957285)

9:30 a.m.
The Link Volume.
Yo'av Rieck*, University of Arkansas
Yasushi Yamashita, Nara Women's University
(106957320)

10:00 a.m.
An upper bound on Reidemeister moves.
Alexander Coward*, University of California at Davis
Marc Lackenby, University of Oxford
(106957256)

10:30 a.m.
Heegaard splittings with large subsurface distances.
Jesse Johnson, Department of Mathematics, Oklahoma State University
Yair N Minsky, Department of Mathematics Yale University
Yoav Moriah*, Department of Mathematics, Technion
(10695756)

Saturday March 19, 2011, 9:00 a.m.10:50 a.m.
Special Session on Topological Problems in Molecular Biology II
Rm 335 Iowa, Iowa Memorial Union Bldg Organizers: Isabel K. Darcy, University of Iowa idarcy@math.uiowa.edu Stephen D. Levene, University of Texas at Dallas Jonathan Simon, University of Iowa

9:00 a.m.
Tutorial on DNA Geometry and Energetics.
Sarah Harris*, School of Physics and Astronomy, University of Leeds
(106992344)

9:30 a.m.
Computer Simulations of DNA Supercoiling at the Atomic Level.
Sarah A Harris*, University of Leeds
(106992139)

10:00 a.m.
Partition Functions and Entropy Estimates for Multiscale Models of DNA.
Andreas Hanke*, University of Texas at Brownsville
Stefan M Giovan, University of Texas at Dallas
Stephen D Levene, University of Texas at Dallas
(106982358)

10:30 a.m.
New Insights into the Mechanism of Tyrosine Recombinases from DNA Loopclosure Kinetics.
Massa J Shoura*, University of Texas at Dallas
Anusha Bharadwaj, University of Texas at Dallas
Matthew R Kesinger, University of Texas at Dallas
Farah H Bardai, University of Texas at Dallas
Alexandre A Vetcher, University of Texas at Dallas
Stephen D Levene, University of Texas at Dallas
(106992317)

Saturday March 19, 2011, 11:00 a.m.11:50 a.m.
Invited Address
Prime chains, arithmetic functions and branching random walks.
Room 243, Iowa Memorial Union Ballroom
Kevin B. Ford*, University of Illinois UrbanaChampaign
Sergei V. Konyagin, Steklov Mathematical Institute, Moscow, Russia
Florian Luca, Universidad Nacional Autonoma de Mexico
(10691103)

Saturday March 19, 2011, 1:30 p.m.2:20 p.m.
Invited Address
The Hofstadter butterfly, uniform hyperbolicity, and gap labeling.
Room 243, Iowa Memorial Union Ballroom
David Damanik*, Rice University
(10693702)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Algebraic Combinatorics III
Rm 345 Northwestern, Iowa Memorial Union Bldg Organizers: Mihai Ciucu, Indiana University mciucu@indiana.edu

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Algebraic KTheory and Homotopy Theory III
Rm 110, MacLean Classroom Bldg Organizers: Teena Gerhardt, Michigan State University teena@math.msu.edu Daniel Ramras, New Mexico State University

Saturday March 19, 2011, 2:30 p.m.4:50 p.m.
Special Session on Analytic and Algebraic Number Theory III
Rm 337 Penn State, Iowa Memorial Union Bldg Organizers: Ling Long, Iowa State University linglong@iastate.edu Yangbo Ye, University of Iowa yey@iowa.uiowa.edu

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Commutative Ring Theory III
Rm 105, MacLean Classroom Bldg Organizers: Daniel D. Anderson, University of Iowa dananderson@uiowa.edu David F. Anderson, University of Tennessee Knoxville anderson@math.utk.edu

2:30 p.m.
Noetherian domains which admit only finitely many star operations.
Evan Houston*, UNC Charlotte
Abdeslam Mimouni, King Faud University of Petroleum & Minerals
Mi Hee Park, ChungAng University
(106913141)

3:00 p.m.
ZeroDivisor and Prüfer Conditions in Commutative Group Rings.
Ryan Schwarz*, University of Connecticut
Sarah Glaz, University of Connecticut
(106913158)

3:30 p.m.
Boolean rings and reciprocal eigenvalue properties.
John D. LaGrange*, Lindsey Wilson College
(106913160)

4:00 p.m.
Three Frameworks for a General Theory of Factorization.
R M OrtizAlbino*, University of Puerto RicoMayaguez
D D Anderson, The University of Iowa
(106913202)

4:30 p.m.
Factorization and unitgroups.
Shashikant B. Mulay*, Dept. of Mathematics, University of Tennessee, Knoxville
(106913169)

5:00 p.m.
PseudoDedekind Factorization.
Marco Fontana, Universita' degli Studi "Roma Tre"
Evan Houston, University of North Carolina Charlotte
Thomas Lucas*, University of North Carolina Charlotte
(106913125)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Global and Padic Representation Theory II
Rm 341 Purdue, Iowa Memorial Union Bldg Organizers: Muthukrishnan Krishnamurthy, University of Iowa mkrishna@math.uiowa.edu Philip Kutzco, University of Iowa philipkutzko@math.uiowa.edu Yangbo Ye, University of Iowa yey@math.uiowa.edu

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Graph Theory III
Rm 348 Illinois, Iowa Memorial Union Bldg Organizers: Maria Axenovich, Iowa State University axenovic@iastate.edu Lale Ozkahya, Iowa State University Michael Young, Iowa State University

2:30 p.m.
2cancellative uniform hypergraphs.
Zoltan Furedi*, UIUC, UrbanaChampaign, IL, USA and Renyi Institute, Budapest
(106905326)

3:00 p.m.
Equitable orientations of hypergraphs.
Yair Caro, University of Haifa  Oranim
Douglas B. West*, University of Illinois  Urbana
Raphael Yuster, University of Haifa  Haifa
(106905155)

3:30 p.m.
Embedding spanning trees.
Bela Csaba*, Dept. of Mathematics and Comp. Sci., Western Kentucky University
Asif Jamshed, Dept. of Computer Science, Rutgers University
Endre Szemeredi, Dept. of Computer Science, Rutgers University
(106905211)

4:00 p.m.
Clique number of graphs with high chromatic number.
Csaba Biro*, University of Louisville
(106905299)

4:30 p.m.
A Simultaneous Random Walk Game.
Andrew Beveridge*, Macalester College
Jorge Banuelos, Macalester College
(10690566)

5:00 p.m.
Unavoidable subhypergraphs: {\bf a}clusters.
Zoltan Furedi, University of Illinois at UrbanaChampaign and Hungarian Academy of Sciences
Lale Ozkahya*, Iowa State University
(106905239)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on History of Mathematics II
Rm 349 Michigan State, Iowa Memorial Union Bldg Organizers: Colin McKinney, Bradley University cmckinney@bumail.bradley.edu

Saturday March 19, 2011, 2:30 p.m.4:50 p.m.
Special Session on Modelling, Analysis and Simulation in Contact Mechanics III
Rm 210, MacLean Classroom Bldg Organizers: Weimin Han, University of Iowa whan@math.uiowa.edu Mircea Sofonea, University of Perpignan sofonea@univperp.fr

2:30 p.m.
Composition Duality Methods for Quasistatic Evolution ElastoViscoPlastic Variational Problems.
Gonzalo Alduncin*, Instituto de Geofísica, UNAM
(10693577)

3:00 p.m.
Comparison of MR fluids and new granular structures in special conditions.
Robert Zalewski*, Warsaw University of Technology Institute of Machines Design Fundamentals
Jerzy Bajkowski, Warsaw University of Technology Institute of Machines Design Fundamentals
(106974176)

3:30 p.m.
A mixed displacementvelocity based formulation of elastic contact.
David E Stewart*, University of Iowa
Wendt J Theodore, University of Wisconsin, LaCrosse
(106974231)

4:00 p.m.
$A_p$ Functions and Some Operators.
Chunping Xie*, Milwaukee School of Engineering
(106943237)

4:30 p.m.
Discontinuous Galerkin Methods for Solving the Signorini Problem.
Fei Wang, Huazhong University of Science and Technology, China
Weimin Han*, Department of Mathematics & Program in Applied Mathematical and Computational Sciences, University of Iowa
Xiaoliang Cheng, Zhejiang University, China
(10696559)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Nonlinear Partial Differential Equations II
Rm 221, MacLean Classroom Bldg Organizers: Hongjie Dong, Brown University Dong Li, University of Iowa Lihe Wang, University of Iowa lwang@math.uiowa.edu Xiaoyi Zhang, University of Iowa

2:30 p.m.
About Rotating Configurations of Compressible Fluids under the Influence of their own Gravity.
Gerhard Strohmer*, The University of Iowa
(106935330)

3:00 p.m.
Quantitative behavior of a parabolichyperbolic chemotaxis model.
Dong Li, Department of Mathematics, University of Iowa
Kun Zhao*, Mathematical Biosciences Institute, The Ohio State University
(106935209)

3:30 p.m.
Long time existence for semilinear wave equations with low regularity.
Chengbo Wang*, Johns Hopkins University
(106935270)

4:00 p.m.
Norm inflation for incompressible magnetohydrodynamic system in $\dot{B}_{\infty}^{1,\infty}$.
Mimi Dai*, Math Department, University of California, Santa Cruz
Jie Qing, Professor at Math Department, University of California, Santa Cruz
Maria Schonbek, Professor at Math Department, University of California, Santa Cruz
(10693505)

4:30 p.m.
General stabilization for the wave equation with boundary damping and source terms.
Tae Gab Ha*, Iowa State University
(106935340)

5:00 p.m.
Some Qualitative Behavior of Solutions to Degenerate ParabolicHyperbolic Equations.
Yachun Li*, The Department of Mathematics, Shanghai Jiao Tong University
(106935196)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Numerical Analysis and Scientific Computing III
Rm 213, MacLean Classroom Bldg Organizers: Kendall E. Atkinson, University of Iowa Bruce P. Ayati, University of Iowa Weimin Han, University of Iowa Laurent O. Jay, University of Iowa ljay@math.uiowa.edu Suely Oliveira, University of Iowa David Stewart, University of Iowa

2:30 p.m.
Hybridizable discontinuous Galerkin methods for biharmonic problems.
Fatih Celiker*, Wayne State University
Bernardo Cockburn, University of Minnesota
Ke Shi, University of Minnesota
(10696585)

3:00 p.m.
The Local Discontinuous Galerkin method for elliptic problems.
Mahboub Baccouch*, University of Nebraska at Omaha
(10696514)

3:30 p.m.
Hierarchical Reconstruction for Central Schemes and Central DG on Overlapping Cells.
Yingjie Liu*, School of Mathematics, Georgia Institute of Technology
(10696543)

4:00 p.m.
A Local Discontinuous Galerkin Method for directly solving HamiltonJacobi Equations.
Jue Yan*, Iowa State University
(10696508)

4:30 p.m.
Some uniformly accurate discontinuous Galerkin methods for thin elastic shells.
Sheng Zhang*, Wayne State University
(106965310)

5:00 p.m.
An Entropy Satisfying Method For The F0kkerPlanck Equation of Fene Dumbell Model For Polymers.
Hailiang Liu, Iowa State University
Hui YU*, Iowa State University
(106965222)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Recent Developments in Nonlinear Evolution Equations II
Rm 218, MacLean Classroom Bldg Organizers: Yinbin Deng, Central China Normal University ybdeng@mail.ccnu.edu.cn Yong Yu, University of Iowa yongyu@uiowa.edu Yi Li, University of Iowa yili@uiowa.edu Shuangjie Peng, Central China Normal University sjpeng@mail.ccnu.edu.cn

2:30 p.m.
Spreading speeds of solutions of reactiondiffusion equations.
Francois Hamel*, AixMarseille University and Institut Universitaire de France
(106935114)

3:00 p.m.
Multidimensional traveling fronts in bistable reactiondiffusion equations.
Masaharu Taniguchi*, Department of Mathematical and Computing Sciences, Tokyo Institute of Technology
(106935215)

3:30 p.m.
Traveling Wave Solutions fo LotkaVolterra System Revisited.
Anthony W Leung, Department of Math Sci, University of Cincinnati
Xiaojie Hou*, Department of Math. Stat, UNCW
Wei Feng, Department of Math. Stat, UNCW
(106935249)

4:00 p.m.
Steady States of the VlasovPoisson System.
Jürgen Batt, Mathematisches Institut, der Universität München
Yi Li*, University of Iowa and Xi'an Jiaotong University
(106935365)

4:30 p.m.
Quasilinear parabolic equations with nonlocal Robin boundary conditions.
Alejandro VelezSantiago*, Postdoc., Department of Mathematics, Iowa State University
(106935164)

5:00 p.m.
On Hot Spots Conjecture for Nonconvex Planar Domain.
Hongbin Chen*, Department of Mathematics, Xi'an Jiaotong University
Yi Li, University of Iowa and Xi'an Jiaotong University
(106935364)

Saturday March 19, 2011, 2:30 p.m.4:50 p.m.
Special Session on Recent Developments in Schubert Calculus II
Rm 347 Minnesota, Iowa Memorial Union Bldg Organizers: Leonardo Mihalcea, Baylor University Leonardo_Mihalcea@baylor.edu

2:30 p.m.
$K$theory of minuscule varieties.
Anders S. Buch*, Rutgers University
Matthew Samuel, Rutgers University
(106905350)

3:00 p.m.
Quantum type deformations of the cohomology ring of the flag manifold.
Liviu Mare*, University of Regina, Canada
(106914294)

3:30 p.m.
Ktheoretic Jfunctions of flag varieties of type A.
Kaisa Taipale*, St. Olaf College
(106914283)

4:00 p.m.
Equivariant Algebraic Cobordism, Part 1.
Jose MalagonLopez*, University of Ottawa, Department of Mathematics and Statistics
(106914207)

4:30 p.m.
Equivariant Algebraic Cobordism (pt. 2).
Jeremiah Heller*, Northwestern University
Jose MalagonLopez, University of Ottawa
(106919206)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Representations of Algebras III
Rm 343 Ohio State, Iowa Memorial Union Bldg Organizers: Frauke Bleher, University of Iowa fbleher@divms.uiowa.edu Calin Chindris, University of Missouri chindrisc@missouri.edu

2:30 p.m.
Invariants of ASRegular Algebras: Complete Intersections.
Ellen E. Kirkman*, Wake Forest University
James J.. Kuzmanovich, Wake Forest University
James J Zhang, University of Washington
(106916151)

3:00 p.m.
Invariant subspaces of linear operators: Symmetry properties via poset representations.
Markus Schmidmeier*, Florida Atlantic University
(106916341)

3:30 p.m.
Periodic algebras arising as endomorphism rings.
Alex Dugas*, University of the Pacific
(106916142)

4:00 p.m.
Sums of Units and Idempotents.
Victor Camillo, University of Iowa
Alexander Diesl*, Wellesely College
(10691687)

4:30 p.m.
Hall algebras over triangulated categories.
Xueqing Chen*, University of WisconsinWhitewater. 800 West Main Street, Whitewater. WI 53190. USA.
(10691676)

5:00 p.m.
A strong generating hypothesis for the stable module category.
Jon Carlson, University of Georgia
Sunil Kumar Chebolu*, Illinois State Univeristy
Jan Minac, University of Western Ontario
(106916101)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Spectral Theory II
Rm 118, MacLean Classroom Bldg Organizers: David Damanik, Rice University damanik@rice.edu Christian Remling, University of Oklahoma

2:30 p.m.
The spectrum of the skewshift Schroedinger operator contains an interval.
Helge Krueger*, Caltech
(106947123)

3:00 p.m.
Quantum Trasport properties of LimitPeridic Schroedinger Operator in dimension two.
Yulia Karpeshina*, UAB
YoungRan Lee, Sogang University, South Korea
Gunter Stolz, UAB
(106935291)

3:30 p.m.
Spectral gaps for sets and measures.
Alexei Poltoratski*, Texas A&M University
(106942131)

4:00 p.m.
On a Subspace Perturbation Problem.
Konstantin A. Makarov*, University of MIssouri, Columbia
Albrecht Seelmann, Institut für Mathematik, Johannes GutenbergUniversität Mainz
(106947268)

4:30 p.m.
Spectral shift function of order $n\geq 3$.
Anna Skripka*, University of Central Florida
(106947183)

5:00 p.m.
Khrushchev's Theory for OPUC via Right Limits.
Maxim Zinchenko*, University of Central Florida
(106939265)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Stochastic Processes with Applications to Mathematical Finance III
Rm 205, MacLean Classroom Bldg Organizers: Igor Cialenco, Illinois Institute of Technology cialenco@iit.edu José E. FigueroaLópez, Purdue University

2:30 p.m.
Counterparty Risk and the Impact of Collateralization in CDS Contracts.
Ismail Iyigunler*, Illinois Institute of Technology
Tomasz Bielecki, Illinois Institute of Technology
Igor Cialenco, Illinois Institute of Technology
(106960245)

3:00 p.m.
Asymptotics of Implied Volatility in Extreme Regimes.
Roger Lee*, University of Chicago
(106991318)

3:30 p.m.
Contracting with Noisy Observations and Misreporting.
Agostino Capponi*, Purdue University
Jaksa Cvitanic, California Institute of Technology
(10696016)

4:00 p.m.
Valuation of Interest Rate Derivatives under Credit Risk and Illiquidity.
Geoffrey R Harris*, Stuart School of Business, Illinois Institute of Technology
Tao L Wu, Stuart School of Business, Illinois Institute of Technology
(106960143)

4:30 p.m.
Monitoring error of the supremum of a Lévy process.
Ao Chen, University of Illinois at UrbanaChampaign
Liming Feng*, University of Illinois at UrbanaChampaign
Renming Song, University of Illinois at UrbanaChampaign
(106960130)

5:00 p.m.
The smallmaturity smile for exponential Lévy models.
Jose E. FigueroaLopez*, Purdue University
Martin Forde, Dublin City University
(106960214)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Thin Position III
Rm 114, MacLean Classroom Bldg Organizers: Jesse Johnson, Oklahoma State University Maggie Tomova, University of Iowa mtomova@math.uiowa.edu

2:30 p.m.
Width is Not Additive.
Ryan C Blair*, University of Pennsylvania
Maggy Tomova, University of Iowa
(106957261)

3:00 p.m.
Circular thin position for free genus one knots.
Fabiola ManjarrezGutierrez*, Instituto de Matematicas UNAM.
Victor Nunez, CIMAT
Enrique RamirezLosada, CIMAT
(106957311)

3:30 p.m.
Additivity of circular width.
Mario EudaveMunoz*, Instituto de Matematicas, Universidad Nacional Autonoma de Mexico
Fabiola ManjarrezGutierrez, Instituto de Matematicas, Universidad Nacional Autonoma de Mexico
(106957271)

4:00 p.m.
$\alpha$sloped thin position for 3manifolds.
Marion Moore Campisi*, University of Texas at Austin
(106957315)

4:30 p.m.
Generating the genus g+1 Goeritz group of a genus g handlebody.
Martin Scharlemann*, U. C. Santa Barbara
(10695771)

5:00 p.m.
Bridge number and nonintegral Dehn surgery.
Kenneth L. Baker, University of Miami
Cameron McA. Gordon, University of Texas at Austin
John Luecke*, University of Texas at Austin
(106957296)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Topological Problems in Molecular Biology III
Rm 335 Iowa, Iowa Memorial Union Bldg Organizers: Isabel K. Darcy, University of Iowa idarcy@math.uiowa.edu Stephen D. Levene, University of Texas at Dallas Jonathan Simon, University of Iowa

2:30 p.m.
The DNA and protein topology of chromosome segregation.
Chuchun Hunag, University of Texas at Austin
Santanu K Ghosh, Indian Institute of Technology, Mumbai, India
Makkuni Jayaram*, University of Texas at Austin
(106992171)

3:00 p.m.
Pathways for DNA rearrangement in ciliates.
Angela Angeleska*, University of Tampa
Natasha Jonoska, University of South Florida
Masahiko Saito, University of South Florida
Laura Landweber, Princeton University
(106905279)

3:30 p.m.
DNA rearrangements through spacial graphs.
J. Burns, University of South Florida
E. Dolzhenko, University of South Florida
N. Jonoska*, University of South Florida
T. Muche, University of South Florida
M. Saito, University of South Florida
(106992212)

4:00 p.m.
Topological Epigenetics: DNA Entanglement and Gene Expression.
De Witt Sumners*, Florida State University
(106992191)

4:30 p.m.
Panel on open problems.
Jonathan Simon*, Department of Mathematics, University of Iowa
De Witt Sumners*, Department of Mathematics, Florida State University
Stu Whittington*, Department of Chemistry, University of Toronto
Lynn Zechiedrich*, Department of Molecular Virology & Microbiology, Baylor College of Medicine
Joanna Ida Sulkowska*, Center for Theoretical Biological Physics UCSD
(106992168)

Saturday March 19, 2011, 2:30 p.m.5:20 p.m.
Special Session on Universal Algebra and Order III
Rm 113, MacLean Classroom Bldg Organizers: John Snow, Concordia University John.Snow@cune.edu Jeremy Alm, Illinois College Clifford Bergman, Iowa State University Kristi Meyer, Wisconsin Lutheran College

2:30 p.m.
Applications of the Constraint Satisfaction Problem to Universal Algebra.
Libor Barto*, McMaster University
(106908157)

3:00 p.m.
A new property of finite NU(4) algebras.
Marcin Kozik, Jagiellonian University
Ross Willard*, University of Waterloo
(106908103)

3:30 p.m.
On the subpower membership problem for Malcev algebras.
Peter Mayr*, Centro de Algebra de Universida de Lisboa, Portugal
(10690824)

4:00 p.m.
Some results obtained with the Universal Algebra Calculator, theorem provers and constraint satisfiers in a Sage package.
Peter Jipsen*, Chapman University
(106906194)

4:30 p.m.
Problems in Universal Algebra and the Theory of Ordered Sets.
John W. Snow*, Concordia University, Nebraska
Jeremy Alm, Illinois College
Kristi Meyer, Wisconsin Lutheran College
(106908217)

Saturday March 19, 2011, 3:00 p.m.4:50 p.m.
Special Session on Geometric Commutative Algebra and Applications III
Rm 346 Indiana, Iowa Memorial Union Bldg Organizers: David Anderson, University of Washington dandersn@math.washington.edu Julianna Tymoczko, University of Iowa tymoczko@math.uiowa.edu

3:00 p.m.
Torus equivariant Dmodules and hypergeometric systems.
Christine Berkesch, Stockholm University
Laura Felicia Matusevich*, Department of Mathematics, Texas A&M University
(106914167)

4:00 p.m.
A vanishing theorem for etale cohomology.
Manoj Kummini, Purdue University
Uli Walther*, Purdue University
(106914152)

4:30 p.m.
Graph curves: Equations, syzygies and secants.
Gregory Burnham, Princeton University
Zvi Rosen, University of Pennsylvania
Jessica Sidman*, Mount Holyoke College
Peter Vermeire, Central Michigan University
(106913242)

Saturday March 19, 2011, 5:30 p.m.7:00 p.m.
University of Iowa hosted RECEPTION
Room 243, Iowa Memorial Union Ballroom
Sunday March 20, 2011

Sunday March 20, 2011, 8:00 a.m.11:50 a.m.
Special Session on Algebraic Combinatorics IV
Rm 345 Northwestern, Iowa Memorial Union Bldg Organizers: Mihai Ciucu, Indiana University mciucu@indiana.edu

8:00 a.m.
Positroids, polytopes, and quantum minors.
Alexander Postnikov*, MIT
(106905333)

9:00 a.m.
A decomposition of the Pearson $X^2$ statistic, with applications to pairwise gene interactions.
Glenn Tesler*, University of California, San Diego
(106962321)

9:30 a.m.
Plane overpartitions and cylindric partitions.
Mirjana Vuletic*, Brown University
(10690599)

10:00 a.m.
Doubledimer pairings and skew Young diagrams.
Richard W. Kenyon, Brown University
David B. Wilson*, Microsoft Research
(106905259)

11:00 a.m.
Mahonian Pairs.
Bruce Sagan*, Michigan State University
Carla Savage, North Carolina State University
(10690545)

11:30 a.m.
Recent progress on Rota's basis conjecture.
Timothy Y Chow*, Center for Communications Research
(106905300)

Sunday March 20, 2011, 8:00 a.m.11:50 a.m.
Special Session on Algebraic KTheory and Homotopy Theory IV
Rm 110, MacLean Classroom Bldg Organizers: Teena Gerhardt, Michigan State University teena@math.msu.edu Daniel Ramras, New Mexico State University

Sunday March 20, 2011, 8:00 a.m.11:50 a.m.
Special Session on Commutative Ring Theory IV
Rm 105, MacLean Classroom Bldg Organizers: Daniel D. Anderson, University of Iowa dananderson@uiowa.edu David F. Anderson, University of Tennessee Knoxville anderson@math.utk.edu

8:00 a.m.
Topologies on the prime spectrum of a ring defined using ultrafilters.
K Alan Loper*, Ohio State University
Carmelo Finocchiaro, University of Rome III
(106913273)

8:30 a.m.
The D+M Construction and a Generalization.
Jason Greene Boynton*, North Dakota State University
Sean SatherWagstaff, North Dakota State University
(106913280)

9:00 a.m.
Factorization properties of some affine domains.
Peter Malcolmson, Department of Mathematics, Wayne State University, Detroit, MI 48202.
Frank Okoh*, Department of Mathematics, Wayne State University, Detroit, MI 48202
(10691363)

9:30 a.m.
Lifting of semifree DG modules over DG algebras.
Saeed Nasseh*, North Dakota State University
Sean SatherWagstaff, North Dakota State University
(106913172)

10:00 a.m.
Generalized Relative Primeness.
Jeremiah Reinkoester*, Mercer University
Dan Anderson, The University of Iowa
(106913118)

10:30 a.m.
Bass Numbers and Semidualizing Modules.
Sean SatherWagstaff*, North Dakota State University
(106913238)

11:00 a.m.
A CohenKaplansky Domain Construction.
Chris Spicer*, Morningside College
Jim Coykendall, North Dakota State University
(106913117)

11:30 a.m.
Integral domains in which nonzero locally principal ideals are invertible.
D. D. Anderson, University of Iowa, Iowa City, IA 52242
Muhammad Zafrullah*, University of Iowa, Iowa City, IA 52242
(106913182)

Sunday March 20, 2011, 8:00 a.m.10:20 a.m.
Special Session on Graph Theory IV
Rm 348 Illinois, Iowa Memorial Union Bldg Organizers: Maria Axenovich, Iowa State University axenovic@iastate.edu Lale Ozkahya, Iowa State University Michael Young, Iowa State University

8:00 a.m.
Graph Packing and Degree Sequences.
Hemanshu Kaul*, Illinois Institute of Technology
(106905323)

8:30 a.m.
Finding many edgedisjoint 1factors in dense graphs.
Stephen G. Hartke*, University of NebraskLincoln
Tyler Seacrest, University of NebraskaLincoln
(106905349)

9:00 a.m.
Quickly Coloring Graphs with Small Arboricity.
Kishore Kothapalli, International Institute of Information Technology, Hyderabad, India
Sriram V Pemmaraju*, Department of Computer Science, The University of Iowa
(106968322)

9:30 a.m.
Induced Saturation Number.
Ryan Martin, Iowa State University
Jason J Smith*, Iowa State University
(106900250)

10:00 a.m.
Graphs containing triangles are not $3$common.
Michael Young*, Iowa State University
James Cummings, Carnegie Mellon University
(106905156)

Sunday March 20, 2011, 8:00 a.m.11:50 a.m.
Special Session on Numerical Analysis and Scientific Computing IV
Rm 213, MacLean Classroom Bldg Organizers: Kendall E. Atkinson, University of Iowa Bruce P. Ayati, University of Iowa Weimin Han, University of Iowa Laurent O. Jay, University of Iowa ljay@math.uiowa.edu Suely Oliveira, University of Iowa David Stewart, University of Iowa

8:00 a.m.
Efficient Numerical Methods for Forward and Inverse Stochastic Helmholtz Equations and Applications.
Haomin Zhou*, School of Mathematics, Georgia Tech,
(106965357)

8:30 a.m.
The numerical solution of Helmholtz's equation for the exterior Neumann problem in three dimensions.
Andreas Kleefeld, Brandenburgische Technische Universitat Cottbus,Cottbus, Germany
TzuChu Lin*, Department of Mathematical Sciences, University of WisconsinMilwaukee, P.O.Box 413, Milwaukee, WI 53201
(106965314)

9:00 a.m.
An Inverse Random Source Scattering Problem in Inhomogeneous Media.
Peijun Li*, Department of Mathematics, Purdue University
(10697860)

9:30 a.m.
Fast finite element solver development for a nonlocal dielectric continuum model.
Dexuan Xie*, Department of Mathematical Sciences, University of Wisconsin, Milwaukee, Wisconsin
(10696547)

11:00 a.m.
Stable Evaluation of Gaussian RBF Interpolants.
Greg Fasshauer*, Department of Applied Mathematics, Illinois Institute of Technology
Mike McCourt, Center for Applied Mathematics, Cornell University
(106965154)

11:30 a.m.
High Performance Computing & Numerical Analysis.
Glenn R. Luecke*, Iowa State University
(10696536)

Sunday March 20, 2011, 8:00 a.m.11:50 a.m.
Special Session on Recent Advances in Hyperbolic and Kinetic Problems II
Rm 217, MacLean Classroom Bldg Organizers: Tong Li, University of Iowa tli@divms.uiowa.edu Hailing Liu, Iowa State University

8:00 a.m.
Large amplitude inertial oscillations in rotating shallow fluids.
John K Hunter*, University of California at Davis
Mihaela Ifrim, University of California at Davis
(106935269)

8:30 a.m.
Vanishing viscosity limit for isentropic compressible fluids.
Ronghua Pan*, Georgia Institute of Technology
(10693595)

9:00 a.m.
Nonlinear Stability of Largeamplitude Traveling Waves Arising from Chemotaxis.
Tong Li*, Department of Mathematics, University of Iowa, Iowa City, IA 52242, USA
ZhiAn Wang, Department of Applied Mathematics, The Hong Kong Polytechnic University
(106935240)

9:30 a.m.
The CauchyDirichlet problem for the FENE dumbbell model of polymeric fluids.
Hailing Liu, Iowa State University
Jaemin Shin*, Institute for Mathematics and its Applications
(106935177)

10:00 a.m.
Boundary Conditions of Linear Moment Systems.
Thierry Goudon, INRIA Research Centre LilleNord Europe
C. David Levermore, Department of Mathematics & Institute for Physical Science and Technology, University of Maryland
Weiran Sun*, Department of Mathematics, University of Chicago
(106935363)

10:30 a.m.
A variational formula for the weak solutions of pressureless EulerPoisson equations.
Eitan Tadmor, Univeristy of Maryland
Dongming Wei*, University of Wisconsin  Madison
(106935124)

11:00 a.m.
Global existence and longtime behavior of smooth solutions and entropy weak solutions to a quasilinear hyperbolic blood flow model.
Tong Li, Department of Mathematics, University of Iowa
Kun Zhao*, Mathematical Biosciences Institute, The Ohio State University
(106935105)

11:30 a.m.
Discontinuous Galerkin based constrained transport schemes for ideal MHD.
James A Rossmanith*, Department of Mathematics, University of Wisconsin  Madison
(10696512)

Sunday March 20, 2011, 8:00 a.m.11:20 a.m.
Special Session on Recent Developments in Nonlinear Evolution Equations III
Rm 218, MacLean Classroom Bldg Organizers: Yinbin Deng, Central China Normal University ybdeng@mail.ccnu.edu.cn Yong Yu, University of Iowa yongyu@uiowa.edu Yi Li, University of Iowa yili@uiowa.edu Shuangjie Peng, Central China Normal University sjpeng@mail.ccnu.edu.cn

9:00 a.m.
On the positive radial solutions of a class of singular semilinear elliptic equations.
Yinbin Deng*, Department of Mathematics, Huazhong Normal University, Wuhan, China
yi li, Department of Mathematics, University of Iowa, Iowa City
fen yang, College of Science, Wuhan University of Science
(106935115)

9:30 a.m.
Symmetry of Entire Solutions to the AllenCahn Equation.
Changfeng Gui, University of Connecticut
Fang Zhang*, University of Connecticut
(106935278)

10:00 a.m.
Gradient blowup rate for a semilinear parabolic equation.
Zhengce Zhang*, Xi'an Jiaotong University
Bei Hu, University of Notre Dame
(106935128)

10:30 a.m.
Discussion  ChangJiang Zhu

11:00 a.m.
Discussion  HuanSong Zhou

Sunday March 20, 2011, 8:00 a.m.10:50 a.m.
Special Session on Representations of Algebras IV
Rm 343 Ohio State, Iowa Memorial Union Bldg Organizers: Frauke Bleher, University of Iowa fbleher@divms.uiowa.edu Calin Chindris, University of Missouri chindrisc@missouri.edu

8:00 a.m.
Discussion

8:30 a.m.
Continuous SpacedOut Cluster Category.
Kiyoshi Igusa*, Brandeis University
Gordana G Todorov, Northeastern University
(106918112)

9:00 a.m.
Cluster automorphisms.
Ibrahim Assem, Universite Sherbrooke
Vasilisa Shramchenko, Universite Sherbrooke
Ralf Schiffler*, University of Connecticut
(10691662)

9:30 a.m.
Stable Endomorphism Rings for Modules that belong to Dihedral Blocks with two Simple Modules.
F. Bleher, University of Iowa
J. Froelich, Dickinson College
G. Llosent*, California State University, SB
(106916135)

10:00 a.m.
Universal Deformation Rings and Dihedral Blocks with Two Simple Modules.
Frauke M. Bleher, The University of Iowa
Giovanna Llosent, California State University San Bernardino
Jennifer B. Schaefer*, Dickinson College
(106916159)

10:30 a.m.
Universal Deformation Rings of Modules over Frobenius Algebras.
Jose A. Velez Marulanda*, Assistant Professor/Valdosta State University
Frauke M. Bleher, Professor/University of Iowa
(10691637)

Sunday March 20, 2011, 8:00 a.m.11:40 a.m.
Contributed Paper Session
Rm 337 Penn State, Iowa Memorial Union Bldg Chairs: Xiaoyi Zhang, University of Iowa

8:00 a.m.
Groups of derangements of the $n$cube.
Oscar Vega*, California State University, Fresno
Larry Cusick, California State University, Fresno
(106905258)

8:30 a.m.
Nim on hypercubes.
Lindsay Anne Erickson*, North Dakota State University
Warren Shreve, North Dakota State University
(106905266)

8:45 a.m.
Extremal Trees with Given Degree Sequence.
Andrew J Radcliffe, University of NebraskaLincoln
Andrew B Ray*, University of NebraskaLincoln
(106905325)

9:00 a.m.
Zeta function of cones over regular graphs.
Marius Somodi*, University of Northern Iowa
Paymun Bayati, University of Northern Iowa
(10690521)

9:15 a.m.
A polynomial invariant of 3valent graphs embedded in the three dimensional space.
Carmen Caprau*, California State University, Fresno
James Tipton, California State University, Fresno
(106905287)

9:30 a.m.
Nongeometric Brownian motion model estimated by Markov Chain approximation.
Hung Yu Chang*, Department of Mathematics, the University of Alabama
(106905303)

9:45 a.m.
Generalized Frobenius algebras, algebraic integral theory and applications to representation theory, Hopf algebras and compact groups.
Miodrag C Iovanov*, University of Southern California & University of Bucharest, Romania
(10691628)

10:15 a.m.
Spikelayer Solutions to Singularly Perturbed Semilinear Systems of Coupled Schrodinger Equations.
Zhongwei Tang*, School of Mathematical Sciences,Beijing Normal University
(10693578)

10:30 a.m.
Quenching behavior for nonlinear degenerate parabolic problems.
W. Y. Chan*, Southeast Missouri State University
(10693569)

10:45 a.m.
Fractional Trigonometry.
Amera Habbeb Almusharrf*, Western Kuntacky University
(10693920)

11:30 a.m.
Sensitivity Analysis of a ThreeSpecies Linear Response Omnivory Model.
James A Vance*, The University of Virginia's College at Wise
Derek Fields, The University of Virginia's College at Wise
(106992241)

Sunday March 20, 2011, 8:30 a.m.10:50 a.m.
Special Session on Recent Developments in Schubert Calculus III
Rm 347 Minnesota, Iowa Memorial Union Bldg Organizers: Leonardo Mihalcea, Baylor University Leonardo_Mihalcea@baylor.edu

8:30 a.m.
Puzzles, positroid varieties, and Vakil's geometric LittlewoodRichardson rule.
Allen Knutson*, Cornell
(10691474)

9:00 a.m.
Puzzle and product formulae for GL(n) BelkaleKumar coefficients.
Kevin Purbhoo*, University of Waterloo
Allen Knutson, Cornell University
(106905316)

9:30 a.m.
Schubert complexes and degeneracy loci.
Steven V Sam*, Massachusetts Institute of Technology
(10691419)

10:00 a.m.
Experimentation at the Frontiers of Reality in Schubert Calculus.
Jon Hauenstein, TAMU
Nick Hein, TAMU
Chris Hillar, MSRI, Redwood Center for Theoretical Neuroscience
Luis GarciaPuente, Sam Houston State University
Abraham Martin del Campo, TAMU
James Ruffo, SUNYOneonta
Frank Sottile, TAMU
Zach Teitler*, Boise State University
(10691433)

10:30 a.m.
Open Richardson varieties in Poisson geometry and ring theory.
Milen Yakimov*, Louisiana State University
(106916276)

Sunday March 20, 2011, 8:30 a.m.10:50 a.m.
Special Session on Universal Algebra and Order IV
Rm 113, MacLean Classroom Bldg Organizers: John Snow, Concordia University John.Snow@cune.edu Jeremy Alm, Illinois College Clifford Bergman, Iowa State University Kristi Meyer, Wisconsin Lutheran College

8:30 a.m.
Endomorphisms and Homomorphisms of QuasiStone Algebras.
M. E. Adams*, Department of Mathematics, State University of New York, New Paltz, NY 12561
W. Dziobiak, Department of Mathematics, University of Puerto Rico, Mayagüez, PR 00681
H. P. Sankappanavar, Department of Mathematics, State University of New York, New Paltz, NY 12561
(106906150)

9:00 a.m.
Transitivity and representation of finite lattices by finite algebras.
Steve Seif*, Math Department, University of Louisville
(10690898)

9:30 a.m.
Quasiprimal algebras and verbose varieties.
Clifford Bergman*, Iowa State University
Joel Berman, university of Illinois at Chicago
(10690883)

10:00 a.m.
A Separation Theorem for the Clone of Nonsurjective Operations.
Agnes E Szendrei*, University of Colorado/University of Szeged
(106908180)

10:30 a.m.
Commutator relations and the clones of finite groups.
Jason Shaw*, St. Mary's University
(106920163)

Sunday March 20, 2011, 9:00 a.m.11:20 a.m.
Special Session on Global and Padic Representation Theory III
Rm 341 Purdue, Iowa Memorial Union Bldg Organizers: Muthukrishnan Krishnamurthy, University of Iowa mkrishna@math.uiowa.edu Philip Kutzco, University of Iowa philipkutzko@math.uiowa.edu Yangbo Ye, University of Iowa yey@math.uiowa.edu

Sunday March 20, 2011, 9:00 a.m.11:50 a.m.
Special Session on Spectral Theory III
Rm 118, MacLean Classroom Bldg Organizers: David Damanik, Rice University damanik@rice.edu Christian Remling, University of Oklahoma

9:00 a.m.
Diffusion of wave packets in a fluctuating random potential.
Yang Kang, Los Angeles, CA
Eman Hamza, University of Cairo
Jeffrey Schenker*, Michigan State University
(106981347)

9:30 a.m.
Absolutely continuous spectrum for the Anderson model on a product of a tree with a finite graph.
Richard G. Froese*, University of British Columbia
Florina Halasan, Friedrich Schiller Universitat Jena
David Hasler, Ludwig Maximilians University
(106981292)

10:00 a.m.
Method of diagram resummation for quasiperiodic Scrodinger equation.
Michael Goldstein*, University of Toronto
(106937232)

10:30 a.m.
Wegner estimate and Anderson localization for random magnetic fields.
David Hasler*, College of William & Mary
(106981247)

11:00 a.m.
Transition in the Eigenvalue Distribution for SelfAdjoint and Unitary Operators.
Mihai Stoiciu*, Williams College
(106946205)

11:30 a.m.
Zeta function on surfaces of revolution.
Klaus Kirsten*, Department of Mathematics, Baylor University
(106958235)

Sunday March 20, 2011, 9:00 a.m.10:20 a.m.
Special Session on Thin Position IV
Rm 114, MacLean Classroom Bldg Organizers: Jesse Johnson, Oklahoma State University Maggie Tomova, University of Iowa mtomova@math.uiowa.edu

Sunday March 20, 2011, 9:00 a.m.11:50 a.m.
Special Session on Topological Problems in Molecular Biology IV
Rm 335 Iowa, Iowa Memorial Union Bldg Organizers: Isabel K. Darcy, University of Iowa idarcy@math.uiowa.edu Stephen D. Levene, University of Texas at Dallas Jonathan Simon, University of Iowa

9:00 a.m.
The effects of density on the topological structure of the mitochondrial DNA from trypanosomes.
J Arsuaga, Department of Mathematics, San Francisco State University
Y Diao*, Department of Mathematics and Statistics, UNC Charlotte
R Kaplan, Department of Mathematics, San Francisco State University
M Vazquez, Department of Mathematics, San Francisco State University
(106957148)

9:30 a.m.
Average crossing number, total curvature and ropelength of thick knots.
Claus Ernst*, Western Kentucky University
Attila Por, Western Kentucky University
(106957302)

10:00 a.m.
Flatribbon links in R2 and the medial axis.
Elizabeth Denne*, Smith College
John M Sullivan, Technische Universität, Berlin
Nancy C Wrinkle, Northeastern Illinois University
(106957297)

10:30 a.m.
Knot reduction for a lattice polygon model of local strand passage.
Michael Szafron, University of Saskatchewan
Christine Soteros*, University of Saskatchewan
(106982308)

11:00 a.m.
Generating Polymers in Confinement.
Yuanan Diao, Department of Mathematics and Statistics, University of North Carolina at Charlotte
Claus Ernst, Department of Mathematics and Computer Science, WKU
Kenneth Hinson, Department of Mathematics and Statistics, University of North Carolina at Charlotte
Uta Ziegler*, Departmet of Mathematics and Computer Science, WKU
(106957353)

11:30 a.m.
SubRiemannian and Symplectic Geometry of Polygon Spaces.
Matt Mastin*, University of Georgia
Jason Cantarella, University of Georgia
(106953329)

Sunday March 20, 2011, 9:30 a.m.11:20 a.m.
Special Session on Geometric Commutative Algebra and Applications IV
Rm 346 Indiana, Iowa Memorial Union Bldg Organizers: David Anderson, University of Washington dandersn@math.washington.edu Julianna Tymoczko, University of Iowa tymoczko@math.uiowa.edu
Inquiries: meet@ams.org

