AMS Sectional Meeting Full Program
Current as of Saturday, April 4, 2009 00:27:23
2009 Spring Central Sectional Meeting
Urbana, IL, March 2729, 2009 (Friday  Sunday)
Meeting #1047
Associate secretaries: Susan J Friedlander, AMS susan@math.northwestern.edu
Friday March 27, 2009

Friday March 27, 2009, 12:00 p.m.4:00 p.m.
Meeting Registration
Room 314, Altgeld Hall 
Friday March 27, 2009, 12:00 p.m.4:00 p.m.
Exhibit and Book Sale
Math Library (2nd Floor), Altgeld Hall 
Friday March 27, 2009, 2:00 p.m.4:50 p.m.
Special Session on Complex Dynamics and Value Distribution, I
Room 441, Altgeld Hall
Organizers:
Aimo Hinkkanen, University of Illinois at UrbanaChampaign aimo@uiuc.edu
Joseph B. Miles, University of Illinois at UrbanaChampaign joe@math.uiuc.edu

2:00 p.m.
Monotonicity and comparison results for conformal invariants.
Albert Baernstein II*, Washington University
A. Yu Solynin, Texas Tech University
(104735152) 
2:30 p.m.
Maimquisttype theorems for Painleve equations.
Edmund Y. M. Chiang*, Hong Kong University of Science and Technology
R. G. Halburd, Loughborough University
E. F. Lingham, Loughborough University
(104730497) 
3:00 p.m.
A reverse Denjoy theorem.
P C Fenton, Department of Mathematics and Statistics, University of Otago
John F Rossi*, Department of Mathematics, Virginia Tech
(10473022) 
3:30 p.m.
Unbounded Bilipschitz Homogeneous Jordan Curves.
David M Freeman*, University of Cincinnati
(104730406) 
4:00 p.m.
On the differential independence of the Riemann Zeta Function and the Euler Gamma Function.
Zhuan J Ye*, Dept of Math. Northern Illinois Univ
(104730241) 
4:30 p.m.
The hyperbolic metric and real affine mappings.
David Minda*, University of Cincinnati
(104730460)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.5:20 p.m.
Special Session on Local and Homological Methods in Commutative Algebra, I
Room 165, Noyes Lab
Organizers:
Florian Enescu, Georgia State University fenescu@gsu.edu
Sandra Spiroff, University of Mississippi spiroff@olemiss.edu

2:00 p.m.
Semidualizing modules and Bass numbers.
Sean SatherWagstaff*, North Dakota State University
(104713265) 
2:30 p.m.
Examples of Some Henselian Rings.
Dana T Weston*, University of Missouri  Columbia
(104713329) 
3:00 p.m.
Dualizing modules and Gorenstein presentations.
David Jorgensen, University of TexasArlington
Graham J Leuschke*, Syracuse University
Sean SatherWagstaff, North Dakota State University
(104713315) 
3:30 p.m.
Coherent Gorenstein Rings.
Livia M Hummel*, University of Indianapolis
(104713259) 
4:00 p.m.
Generators of the defining ideals of monomial curves.
Hema Srinivasan*, University of Missouri
(104713385) 
4:30 p.m.
Koszul modules over short Gorenstein local rings.
Inês Bonacho dos Anjos Henriques*, Department of Mathematics, University of NebraskaLincoln
Liana M. Şega, Department of Mathematics and Statistics, University of Missouri
(104713399) 
5:00 p.m.
Contracting endomorphisms and Gorenstein modules.
Hamid Rahmati*, University of NebraskaLincoln
(104713383)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.4:50 p.m.
Special Session on Number Theory in the Spirit of Erdos, I
Room 143, Altgeld Hall
Organizers:
Kevin Ford, University of Illinois at UrbanaChampaign ford@math.uiuc.edu
A. J. Hildebrand, University of Illinois at UrbanaChampaign hildebr@math.uiuc.edu

2:00 p.m.
A 1935 Erdős paper on prime numbers and Euler's function.
Carl Pomerance*, Dartmouth College
(104711157) 
3:00 p.m.
Phase transitions in infinitely generated groups, and a problem in additive number theory.
Melvyn B. Nathanson*, CUNY (Lehman College and the Graduate Center)
(10471112) 
3:30 p.m.
Dense Egyptian fractions.
Greg Martin*, University of British Columbia
(10471111) 
4:00 p.m.
On Carmichael and Giuga numbers.
William D Banks*, University of Missouri
(104711356) 
4:30 p.m.
Some problems concerning the fraction $\sigma(n)/n$.
Paul Pollack*, University of Illinois at UrbanaChampaign
(104711454)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.5:20 p.m.
Special Session on Time, Scale and Frequency Methods in Harmonic Analysis, I
Room 141, Altgeld Hall
Organizers:
Richard S. Laugesen, University of Illinois at UrbanaChampaign Laugesen@illinois.edu
Darrin M. Speegle, St. Louis University speegled@slu.edu

2:00 p.m.
On some maximal multipliers in $L^p$.
Ciprian Demeter*, Indiana University, Bloomington
(104742417) 
2:30 p.m.
On curvature and the bilinear multiplier problem.
S. Zubin Gautam*, University of California, Los Angeles
(104742426) 
3:00 p.m.
Some operators related to multilinear oscillatory integrals.
Xiaochun Li*, University of Illinois at UrbanaChampaign
(104742496) 
3:30 p.m.
Timefrequency localization and sampling of multiband signals.
Joseph D Lakey*, New Mexico State University
(10474234) 
4:00 p.m.
Gabor frames and directional timefrequency analysis.
Loukas Grafakos*, University of Missouri
Christopher Sansing, Department of Defense
(104742199) 
4:30 p.m.
Spline Wavelets, Finite Element Wavelets, and Wavelets with Composite Dilation.
TianXiao He*, Illinois Wesleyan University
(104742214) 
5:00 p.m.
Sparsity Equivalence of Anisotropic Decompositions.
David L. Donoho, Stanford University
Gitta Kutyniok*, University of Osnabrueck
(104742319)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.5:20 p.m.
Special Session on Hyperbolic Geometry and Teichmuller Theory, I
Room 443, Altgeld Hall
Organizers:
Jason Deblois, University of Illinois at Chicago jdelbois@math.uic.edu
Richard P. Kent, IV, Brown University rpkfour@gmail.com
Christopher J. Leininger, University of Illinois at UrbanaChampaign clein@math.uiuc.edu

2:00 p.m.
Title: The Casson invariant and the word metric on the Torelli group.
Nathan Broaddus*, University of Chicago
Benson Farb, University of Chicago
Andrew Putman, MIT
(104757185) 
2:30 p.m.
The determinant of the Laplacian, Lyapunov exponents and volumes of strata of quadratic differentials.
Alex Eskin*, University of Chicago
(104737293) 
3:00 p.m.
Controlling covers of arithmetic orbifolds.
D B McReynolds*, University of Chicago
(104751107) 
3:30 p.m.
Discussion 
4:00 p.m.
Fourfree groups and hyperbolic geometry.
Marc Culler*, University of Illinois at Chicago
Peter B. Shalen, University of Illinois at Chicago
(104757316) 
4:30 p.m.
A combinatorial property of isometric Zactions and geodesic flow.
Ian Biringer*, University of Chicago
(104751149) 
5:00 p.m.
Epstein surfaces, trees, and bubbles.
David Dumas*, University of Illinois at Chicago
(104753182)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.5:20 p.m.
Special Session on Topological Dynamics and Ergodic Theory, I
Room 345, Altgeld Hall
Organizers:
Alica Miller, University of Louisville amiller@erdos.math.louisville.edu
Joseph Rosenblatt, University of Illinois at UrbanaChampaign rosnbltt@math.uiuc.edu

2:00 p.m.
Rudolph's Thesis.
Matthew Foreman*, UC Irvine
(104737452) 
3:00 p.m.
A concentration function estimate and intersective sets from matrices.
Paul Balister, Memphis
Randall McCutcheon*, Memphis
(104737289) 
3:30 p.m.
About positive and zero exponents of $SL(2,R)$ valued cocycles over irrational rotation flows, in the smooth category.
Mahesh G Nerurkar*, Rutgers University, New Jersey, 08102.
(104737165) 
4:00 p.m.
The set of sequence entropies for a given space.
Xiangdong Ye*, university of science and technology of china
(104737110) 
4:30 p.m.
On the Pointwise Ergodic Theorem along squares.
Ciprian Demeter*, Indiana University, Bloomington
(104737416) 
5:00 p.m.
Multiple ergodic theorems for Hardy field sequences.
Nikos Frantzikinakis*, University of Memphis
(104737440)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.5:20 p.m.
Special Session on qSeries and Partitions, I
Room 147, Altgeld Hall
Organizers:
Bruce Berndt, University of Illinois at UrbanaChampaign berndt@math.uiuc.edu
Ae Ja Yee, Pennsylvania State University yee@math.psu.edu

2:00 p.m.
A partial theta identity of Ramanujan and its number theoretic interpretation.
Krishnaswami Alladi*, University of Florida
(104711131) 
2:30 p.m.
The GBGRank , 4cores and 3cores.
Alexander Berkovich*, Mathematics Department, University of Florida
(104705328) 
3:00 p.m.
Rank and crank partition congruences.
Frank G Garvan*, University of Florida
(104711371) 
3:30 p.m.
Ranks for a Function Related to Overpartitions.
Song Heng Chan*, Nanyang Technological University
Ae Ja Yee, Penn State University
(104711422) 
4:00 p.m.
A Proof of Sellers' Conjecture.
Peter Paule*, Research Institute for Symbolic Computation (RISC)
(104711370) 
4:30 p.m.
Number theoretic properties of generating functions related to Dyson's rank for partitions into distinct parts.
Maria J Monks*, Massachusetts Institute of Technology
(10471199) 
5:00 p.m.
On the subpartitions of the ordinary partitions.
Byungchan Kim*, University of Illinois, UrbanaChampaign
(10471189)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.4:50 p.m.
Special Session on Concrete Aspects of Real Positive Polynomials, I
Room 162, Noyes Lab
Organizers:
Victoria Powers, Emory University vicki@mathcs.emory.edu
Bruce Reznick, University of Illinois at UrbanaChampaign reznick@illinois.edu

2:00 p.m.
Optimizing Polynomials via Low Dimensional Restrictions.
Grigoriy Blekherman*, Brooklyn, NY
(104726298) 
2:30 p.m.
A convex polynomial that is not SOSconvex.
Amir Ali Ahmadi, Massachusetts Institute of Technology
Pablo A. Parrilo*, Massachusetts Institute of Technology
(104712415) 
3:00 p.m.
Rational sums of squares and applications.
Christopher Jacques Hillar*, MSRI
(104713424) 
3:30 p.m.
Diagonal minus tail forms and Lasserre's sufficient conditions for sums of squares.
Carla Fidalgo*, Departamento de Física e Matemática, Instituto Superior de Engenharia de Coimbra
Alexander Kovacec, Departamento de Matemática, Universidade de Coimbra
(104714246) 
4:00 p.m.
Noncoercive sums of squares in $\mathbb{R} [x_1, ... ,x_n]$.
Gregory C Verchota*, Syracuse University
(10471265) 
4:30 p.m.
On Hilbert's theorem for psd ternary sextics.
Bruce Reznick*, University of Illinois at UrbanaChampaign
(104714390)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.5:20 p.m.
Special Session on The Logic and Combinatorics of Algebraic Structures, I
Room 203, Noyes Lab
Organizers:
John Snow, Concordia University john.snow@cune.edu
Jeremy Alm, Illinois College alm.academic@gmail.com

2:00 p.m.
Relation algebras from group actions.
Jeremy F Alm*, Illinois College
(104703170) 
2:30 p.m.
Birelativized relation algebras.
Richard L Kramer*, Iowa State University
(104703121) 
3:00 p.m.
Chromatic Graphs, Ramsey Numbers, and the Flexible Atom Conjecture.
Jeremy F. Alm, Illinois College
Roger D. Maddux, Iowa State University
Jacob Manske*, Iowa State University
(10470571) 
3:30 p.m.
Relational relevance algebras.
Roger D Maddux*, Iowa State University
(104703100) 
4:30 p.m.
Clones with finitely many relative $\mathcal R$classes.
Agnes E. Szendrei*, University of Colorado
Erkko Lehtonen, University of Luxembourg
(104708173) 
5:00 p.m.
Moufang sets of finite Morley rank.
Josh Wiscons*, University of Colorado at Boulder
(104720148)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.4:20 p.m.
Special Session on Geometric Group Theory
Room 445, Altgeld Hall
Organizers:
Sergei V. Ivanov, University of Illinois at UrbanaChampaign ivanov@math.uiuc.edu
Ilya Kapovich, University of Illinois at UrbanaChampaign kapovich@math.uiuc.edu
Igor Mineyev, University of Illinois at UrbanaChampaign mineyev@math.uiuc.edu
Paul E. Schupp, University of Illinois at UrbanaChampaign schupp@math.uiuc.edu

2:00 p.m.
Classifying surface bundles.
Daniel P. Groves*, University of Illinois at Chicago
(104720195) 
2:30 p.m.
Sofic groups and profinite topology on free groups.
Lev Glebsky*, UASLP, Mexico. UIUC visiting.
L.M. Rivera, University of Zacatecaz, Mexico
(104720369) 
3:00 p.m.
Dehn functions of solvable groups.
Kevin Wortman*, University of Utah
(104720335) 
3:30 p.m.
Search problems in group theory.
Vladimir Shpilrain*, The City College of New York
(104720324) 
4:00 p.m.
Packing subgroups and relative hyperbolicity.
G Christopher Hruska*, University of WisconsinMilwaukee
Daniel T Wise, McGill University
(104720468)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.3:55 p.m.
Special Session on Algebraic Methods in Statistics and Probability, I
Room 204, Noyes Lab
Organizers:
Marlos A. G. Viana, University of Illinois at Chicago viana@uic.edu

2:00 p.m.
Selfavoiding generating sequences for Fourier lattice designs.
Henry P Wynn*, London School of Economics
(10470364) 
2:30 p.m.
Kiefercomplete classes of designs for cubic mixture models.
Thomas Klein*, Technische Universität München, Germany
(10476244) 
3:00 p.m.
NonParametric Modeling and Survey Design for Censored Preference Data.
Paul Kidwell*, Purdue University
Yi Mao, Purdue University
Guy Lebanon, Georgia Institute of Technology
(10476221) 
3:30 p.m.
Dihedral Fourier Analysis in Statistical Optics.
Marlos A.G. Viana*, University of Illinois at Chicago
Vasudevan Lakshminarayanan, University of Waterloo, Waterloo, Canada
(104742180)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.5:20 p.m.
Special Session on Graph Theory, I
Room 161, Noyes Lab
Organizers:
Alexander V. Kostochka, University of Illinois at UrbanaChampaign kostochk@math.uiuc.edu
Douglas B. West, University of Illinois at UrbanaChampaign west@math.uiuc.edu

2:00 p.m.
Packing seagulls.
Maria Chudnovsky, Columbia University
Paul Seymour*, Princeton University
(104705314) 
2:30 p.m.
Compact topological cliques in sparse graphs.
Tao Jiang*, Miami University, Oxford, Ohio
(104705111) 
3:00 p.m.
Finding minors in graphs with a given path structure.
André Kündgen*, California State University San Marcos
Michael Pelsmajer, Illinois Institute of Technology
Radhika Ramamurthi, California State University San Marcos
(104705467) 
3:30 p.m.
Graph Minors and graph linkages.
Kenichi Kawarabayashi, National Institute of Informatics, Japan
Gexin Yu*, College of William and Mary
(104705244) 
4:00 p.m.
$K_5$subdivisions in 5connected nonplanar graphs.
Jie Ma, Georgia Institute of Technology
Xingxing Yu*, Georgia institute of Technology
(104705104) 
4:30 p.m.
Teledomination in special graph classes: A survey of algorithmic and complexity results.
Jan Kratochvil*, Charles University, Prague
(104705436) 
5:00 p.m.
Rao's degree sequence conjecture and wellquasiordering tournaments by immersion.
Maria Chudnovsky*, Columbia Univeristy
Paul Seymour, Princeton Univeristy
(104705239)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.5:20 p.m.
Special Session on Probabilistic and Extremal Combinatorics, I
Room 163, Noyes Lab
Organizers:
Jozsef Balogh, University of Illinois at UrbanaChampaign jobal@math.uiuc.edu
Zoltan Furedi, University of Illinois at UrbanaChampaign zfuredi@math.uiuc.edu

2:00 p.m.
New results in ErdosFranklRodl theory.
Jozsef Balogh, University of Illinois at UrbanaChampaign
Bela Bollobas, Cambridge Univerity, UK and U. of Memphis, TN
Miklos Simonovits*, Renyi Institute, Budapest, Hungary
(104705334) 
2:30 p.m.
Random transceiver networks.
Paul Balister*, University of Memphis
Béla Bollobás, Cambridge University, UK, and University of Memphis
Mark Walters, Queen Mary, University of London, UK
(104760419) 
3:00 p.m.
On the sumproduct problem.
Jozsef Solymosi*, Department of Mathematics. University of British Columbia
(104705307) 
3:30 p.m.
Counting graphs without a fixed subgraph.
Jozsef Balogh, University of Illinois at UrbanaChampaign
Wojciech Samotij*, University of Illinois at UrbanaChampaign
(104705339) 
4:00 p.m.
On the minimum degree of minimal Ramsey graphs.
Tibor Szabo*, McGill University
Philipp Zumstein, ETH Zurich
Stefanie Zuercher, ETH Zurich
(104705471) 
4:30 p.m.
Independent dominating sets in graphs of girth five.
Jacques A Verstraete*, University of California San Diego
(104705481) 
5:00 p.m.
Phylogenetic combinatorics.
Laszlo A Szekely*, University of South Carolina
(104705183)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.2:20 p.m.
Special Session on Mathematical Visualization, I
Room 102, Altgeld Hall
Organizers:
George K. Francis, University of Illinois at UrbanaChampaign gfrancis@uiuc.edu
Louis H. Kauffman, University of Illinois at Chicago kauffman@uic.edu
Dennis Martin Roseman, University of Iowa roseman@math.uiowa.edu
Andrew J. Hanson, Indiana University hanson@cs.indiana.edu

2:00 p.m.
Partiview in the Cube.
Stuart Levy*, National Center for Supercomputing Applications, U Illinois, Urbana
William Davis, University of Illinois, Urbana
(104751288)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.4:55 p.m.
Special Session on Holomorphic and CR Mappings, I
Room 343, Altgeld Hall
Organizers:
John P. D'Angelo, University of Illinois at UrbanaChampaign jpda@math.uiuc.edu
Jiri Lebl, University of Illinois at UrbanaChampaign jlebl@math.uiuc.edu
Alex Tumanov, University of Illinois at UrbanaChampaign tumanov@math.uiuc.edu

2:00 p.m.
Möbius geometry of hypersurfaces.
Michael D Bolt*, Calvin College
(104732408) 
2:30 p.m.
CR singularities of real $4$manifolds in ${\mathbb{C}}^3$.
Adam Coffman*, Indiana University  Purdue University Fort Wayne
(10473254) 
3:00 p.m.
Regularity in the CR embedding problem.
Xianghong Gong*, University of Wisconsin
Sidney M. Webster, University of Chicago
(104732479) 
3:30 p.m.
Holomorphic Extensions in Toric Varieties.
Malgorzata Aneta Marciniak*, Misssouri University of Science and Technology
(10473233) 
4:00 p.m.
Geometry of Tubelike Domains in $\mathbb C^2$.
Roman J. Dwilewicz*, Missouri University of Science and Technology
(104732457) 
4:30 p.m.
Explicit Construction of Moduli Space of Bounded Complete Reinhardt Domains in $C^n$ and Hilbert 14th Problems.
S. T. Stephen Yau*, University of Illinois at Chicago
Rong Du, University of Illinois at Chicago
Yun Gao, University of Illinois at Chicago
(10475353)

2:00 p.m.

Friday March 27, 2009, 2:00 p.m.5:25 p.m.
Session on Session for Contributed Papers, I
Room 304, Noyes Lab

2:15 p.m.
LLL reduction and a conjecture of Gunnells.
Darrin M. Doud*, Brigham Young University
(104711187) 
2:30 p.m.
Powered sum formulas via termwise integrations: a geometric point of view.
Hungping Tsao*, Novato, California
(10471106) 
2:45 p.m.
Variants the Diophantine equation $x! + 1 = y^2$.
Alain Togbe*, Purdue University North Central
(104711343) 
3:00 p.m.
Ramanujan Primes and Bertrand's Postulate.
Jonathan Sondow*, New York, NY
(104711391) 
3:15 p.m.
Flat Primes and Thin Primes.
Kevin A Broughan*, University of Waikato, Hamilton, New Zealand
(10471156) 
3:30 p.m.
Method of Infinite Ascent applied on $2^p.A^6 + B^3 = C^2$.
Susil Kumar Jena*, KIIT University, Bhubaneswar751024, Orissa, India
(10471109) 
3:45 p.m.
On the Construction of Skew QuasiCyclic Codes.
T Abualrub, American University of Sharjah, Sharjah, UAE
A Ghrayeb, Concordia University, Montreal, Quebec
N Aydin*, Kenyon College, Ohio, USA
I Siap, Adiyaman Univ., Adiyaman, Turkey
(10470535) 
4:15 p.m.
Mutually orthogonal latin squares based on groups.
Anthony B Evans*, Wright State University
(10470528) 
4:30 p.m.
Geometric Figures as Sets of Convergent, Divergent and Parallel Lines and Surfaces.
Stewart E Brekke*, International University for Graduate Studies
(10470019) 
4:45 p.m.
Deformation Theory as a generalization of Lie Theory.
Lucian Miti Ionescu*, Illinois State University
(104718106) 
5:00 p.m.
The $sl_3$ Selberg integral.
S. Ole Warnaar*, The University of Queensland, Australia
(104705341) 
5:15 p.m.
Using Mathematica to Visualize Bifurcation and Chaos in the Dynamics of Symplectic Integrators.
O. Michael Melko*, Northern State University
(104737409)

2:15 p.m.

Friday March 27, 2009, 2:30 p.m.5:20 p.m.
Special Session on Differential Geometry and Its Applications, I
Room 341, Altgeld Hall
Organizers:
Stephanie B. Alexander, University of Illinois at UrbanaChampaign stephanieb.alexander@gmail.com
Jianguo Cao, University of Notre Dame cao.7@nd.edu

2:30 p.m.
Quasilinearization, Euler's inequality and Aleksandrov's curvature.
Igor G Nikolaev*, University of Illinois at UrbanaChampaign
(104753253) 
3:00 p.m.
Conjugate points and non injectivity of the exponential map.
Keith Burns*, Northwestern University
Benjamin Schmidt, University of Chicago
(10475366) 
3:30 p.m.
Compact convex central crosssections make surfaces quadric.
Bruce M Solomon*, Indiana University, Bloomington
(104753271) 
4:00 p.m.
Leafwise entropy rigidity for foliations.
Chris Connell*, Indiana University, Bloomington
Zhenyu Li, Indiana University, Bloomington
(104753299) 
4:30 p.m.
Effective universal coverings and their applications.
Alexander Nabutovsky*, University of Toronto
(104753150) 
5:00 p.m.
Short geodesic loops on complete Riemannian manifolds.
Regina Rotman*, University of Toronto
(104753164)

2:30 p.m.

Friday March 27, 2009, 2:30 p.m.5:20 p.m.
Special Session on Geometric Function Theory and Analysis on Metric Spaces, I
Room 447, Altgeld Hall
Organizers:
Sergiy Merenkov, University of Illinois at UrbanaChampaign merenkov@uiuc.edu
Jeremy Taylor Tyson, University of Illinois at UrbanaChampaign tyson@math.uiuc.edu
JangMei Wu, University of Illinois at UrbanaChampaign wu@math.uiuc.edu

2:00 p.m.
Dynamics of quasiconformal fields.
Jani Onninen*, Syracuse University
Tadeusz Iwaniec, Syracuse University
Leonid V Kovalev, Syracuse University
(104730489) 
2:30 p.m.
Thurston obstructions and Ahlfors regular conformal dimension.
Kevin M Pilgrim*, Dept. Math., Indiana University
Peter Haissinsky, Universite de Provence
(104737247) 
3:00 p.m.
Invariant Peano curves of expanding Thurston maps.
Daniel Meyer*, Department of Mathematics and Statistics, University of Helsinki
(104737309) 
3:30 p.m.
Uniform Metric Spaces and Pointed GromovHausdorff Distance.
David A Herron*, University of Cincinnati
(104751437) 
4:00 p.m.
Metric cotype and quasisymmetric embeddings.
Kevin Wildrick*, University of Jyväskylä
Ellen Veomett, California State University, East Bay
(104746134) 
4:30 p.m.
Finite distortion, value distribution, and cohomology.
Pekka J. Pankka*, University of Michigan
(104730176) 
5:00 p.m.
On approximate differentiability of the maximal function.
Piotr Hajlasz*, University of Pittsburgh
Jan Maly, Charles University and Purkyne University (Czech Republic)
(104746410)

2:00 p.m.

Friday March 27, 2009, 3:00 p.m.4:45 p.m.
Special Session on Topological Field Theories, Representation Theory, and Algebraic Geometry, I
Room 347, Altgeld Hall
Organizers:
Thomas Nevins, University of Illinois at UrbanaChampaign nevins@uiuc.edu
David BenZvi, University of Texas at Austin benzvi@math.utexas.edu

3:00 p.m.
Representation Theory and Equivariant Topological Field Theories.
Dmytro Shklyarov*, Kansas State University
(104781102) 
4:00 p.m.
Moduli problems and localization functors in orbifold CFT.
Matthew M Szczesny*, Boston University
(104714142)

3:00 p.m.

Friday March 27, 2009, 3:00 p.m.5:20 p.m.
Special Session on The Interface Between Number Theory and Dynamical Systems, I
Room 245, Altgeld Hall
Organizers:
Florin Boca, University of Illinois at UrbanaChampaign fboca@math.uiuc.edu
Jeffrey Lagarias, University of Michigan lagarias@umich.edu
Kenneth Stolarsky, University of Illinois at UrbanaChampaign stolarsk@math.uiuc.edu

3:00 p.m.
(Non)uniform bounds for rational preperiodic points in arithmetic dynamics.
Robert L. Benedetto*, Amherst College
(10471173) 
4:00 p.m.
Dynamical MordellLang problems.
Thomas J Tucker*, University of Rochester
(10471123) 
4:30 p.m.
Galois theory of iterated Euclidean constructions.
R. Patrick Morton*, Indiana University  Purdue University at Indianapolis (IUPUI)
(104712464) 
5:00 p.m.
On the Number of Rational PreImages of the Origin Under Quadratic Dynamical Systems.
Xander Faber, McGill University
Benjamin Hutz*, Amherst College
(104711445)

3:00 p.m.

Friday March 27, 2009, 3:00 p.m.5:20 p.m.
Special Session on Operator Algebras and Operator Spaces, I
Room 145, Altgeld Hall
Organizers:
ZhongJin Ruan, University of Illinois at UrbanaChampaign ruan@math.uiuc.edu
Florin P. Boca, University of Illinois at UrbanaChampaign fboca@math.uiuc.edu
Marius Junge, University of Illinois at UrbanaChampaign junge@math.uiuc.edu

3:00 p.m.
Continuous Deformations of Commuting Squares.
Remus Nicoara*, University of Tennessee, Knoxville
(104747465) 
3:30 p.m.
Property $T$ for Discrete Quantum Groups.
Pierre Fima*, University of Illinois at UrbanaChampaign
(104746355) 
4:00 p.m.
Normalizers of Subalgebras of Finite von Neumann Algebras.
Alan D Wiggins*, Vanderbilt University
Junsheng Fang, Texas A&M University
Roger Smith, Texas A&M University
Stuart White, University of Glasgow
(104746480) 
4:30 p.m.
Intersection theory in a finite von Neumann algebra.
Hari Bercovici*, Indiana University
(104746348) 
5:00 p.m.
Strong sums of projections.
Victor Kaftal*, University of Cincinnati
(104747311)

3:00 p.m.

Friday March 27, 2009, 5:40 p.m.6:30 p.m.
Invited Address
Lfunctions: Identities and estimates.
Room 314, Altgeld Hall
Akshay Venkatesh*, New York UniversityCourant Institute
(10471101)
Saturday March 28, 2009

Saturday March 28, 2009, 7:30 a.m.4:00 p.m.
Meeting Registration
Room 321 (Math Dept Common Room), Altgeld Hall 
Saturday March 28, 2009, 7:30 a.m.4:00 p.m.
Exhibit and Book Sale
Math Library (2nd Floor), Altgeld Hall 
Saturday March 28, 2009, 8:00 a.m.10:50 a.m.
Special Session on Algebra, Geometry and Combinatorics, I
Room 217, Noyes Lab
Organizers:
Rinat Kedem, University of Illinois at UrbanaChampaign rinat@uiuc.edu
Alexander T. Yong, University of Illinois at UrbanaChampaign ayong@uiuc.edu

8:00 a.m.
MV polytopes and components of quiver varieties.
Joel Kamnitzer*, University of Toronto
Pierre Baumann, Strasbourg
(104714155) 
8:30 a.m.
Quiver Grassmannians.
Alistair Savage*, University of Ottawa
(104717449) 
9:00 a.m.
Rank functions and quiver representations.
Ryan Kinser*, University of Michigan
(10471631) 
9:30 a.m.
Fusion of affine Grassmannians.
Peter Magyar*, Michigan State University
(104722484) 
10:00 a.m.
Charge=Height.
Bogdan Ion*, University of Pittsburgh
(104717333) 
10:30 a.m.
Noncrossing partitions and the shard intersection order.
Nathan Reading*, North Carolina State University
(104705353)

8:00 a.m.

Saturday March 28, 2009, 8:00 a.m.11:20 a.m.
Special Session on Nonlinear Partial Differential Equations and Applications, I
room 241, Altgeld Hall
Organizers:
Igor Kukavica, University of Southern California kukavica@usc.edu
Anna L. Mazzucato, Pennsylvania State University mazzucat@math.psu.edu

8:00 a.m.
Regularity of solutions for the critical Ndimensional Burgers' equation.
Chi Hin Chan*, The University of Texas at Austin. Department of Mathematics
Magdalena Czubak, University of Toronto. Department of Mathematics
(104735403) 
8:30 a.m.
Exterior BoundaryValue Problem with Application in General Relativity.
Nicolae Tarfulea*, Purdue University Calumet
(104735386) 
9:00 a.m.
Instantaneous boundarytangency of singularity curves in compressible fluid flow.
David Hoff*, Department of Mathematics/Indiana University
Misha Perepelitsa, Department of Mathematics/Vanderbilt University
(10473559) 
9:30 a.m.
Vanishing viscosity in the plane for nondecaying initial vorticity.
Elaine Cozzi*, Carnegie Mellon University
(104776466) 
10:00 a.m.
On the maximal enstrophy growth rate for solutions to the 3D NavierStokes equations.
Alexey Cheskidov*, University of Illinois at Chicago
(104735492) 
10:30 a.m.
The Domain of Analyticity of Solutions to the ThreeDimensional Euler Equations.
Igor Kukavica, University of Southern California
Vlad Vicol*, University of Southern California
(104735308) 
11:00 a.m.
TimePeriodic Interfacial Fluid Flows.
David M Ambrose*, Drexel University
(104735351)

8:00 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on Complex Dynamics and Value Distribution, II
Room 441, Altgeld Hall
Organizers:
Aimo Hinkkanen, University of Illinois at UrbanaChampaign aimo@uiuc.edu
Joseph B. Miles, University of Illinois at UrbanaChampaign joe@math.uiuc.edu

8:30 a.m.
Repelling fixed points are dense in the Julia set of a Rational or Entire Semigroup.
Rich L Stankewitz*, Ball State University
(104730169) 
9:00 a.m.
Bounded approximation on open and closed subsets of the complex plane.
Arthur A. Danielyan*, Department of Mathematics and Statistics, Univesity of South Florida
(104730201) 
9:30 a.m.
Tropical Nevanlinna theory.
Ilpo Laine*, University of Joensuu, Finland
(10471470) 
10:00 a.m.
A special class of functions in the unit disc as coefficients for differential equations.
Linda R. Sons*, Northern Illinois University
(104730382) 
10:30 a.m.
Convergence of backwarditeration sequences with bounded hyperbolic step in higher dimension.
Olena Ostapyuk*, Kansas State University
(104730389) 
11:00 a.m.
Pointed GromovHausdorff Distance.
David A Herron*, University of Cincinnati
(104751438)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:15 a.m.
Special Session on Topological Field Theories, Representation Theory, and Algebraic Geometry, II
Room 347, Altgeld Hall
Organizers:
Thomas Nevins, University of Illinois at UrbanaChampaign nevins@uiuc.edu
David BenZvi, University of Texas at Austin benzvi@math.utexas.edu

8:30 a.m.
Character sheaves.
David BenZvi, Texas  Austin
David Nadler*, Northwestern
(104714151) 
9:30 a.m.
The projective McKay correspondence.
Christopher Brav*, University of Toronto
(104714300) 
10:30 a.m.
Stability conditions, Springer fibers and braids with multiplied threads.
Rina Anno*, University of Chicago
(104714421)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on Local and Homological Methods in Commutative Algebra, II
Room 165, Noyes Lab
Organizers:
Florian Enescu, Georgia State University fenescu@gsu.edu
Sandra Spiroff, University of Mississippi spiroff@olemiss.edu

8:30 a.m.
Monomial csequences.
Hamid Kulosman*, University of Louisville
(104713338) 
9:00 a.m.
Asymptotic Growth of Algebras Associated to Powers of Ideals.
S Dale Cutkosky*, University of Missouri
Juergen Herzog, University of DuisburgEssen
Hema Srinivasan, University of Missouri
(104713379) 
9:30 a.m.
3Standardness of the Maximal Ideal.
H. Ananthnarayan*, University of Kansas
(104713272) 
10:00 a.m.
Uniform equivalence of symbolic and adic topologies.
C. Huneke, University of Kansas
D. Katz*, University of Kansas
J. Validashti, University of Kansas
(104701159) 
10:30 a.m.
Relative Multiplicities of Graded Algebras.
Javid Validashti*, The University of Kansas
(104713122) 
11:00 a.m.
HilbertKunz Functions without the Normal Condition.
CY. Jean Chan*, Central Michigan University
(104713337)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on Time, Scale and Frequency Methods in Harmonic Analysis, II
Room 141, Altgeld Hall
Organizers:
Richard S. Laugesen, University of Illinois at UrbanaChampaign Laugesen@illinois.edu
Darrin M. Speegle, St. Louis University speegled@slu.edu

8:30 a.m.
The trivial intersection property of generalized multiresolution analyses.
Veronika Furst*, Fort Lewis College
(104743330) 
9:00 a.m.
Notions of equivalence of generalized multiresolution analyses.
Judith A Packer*, University of Colorado at Boulder
(104742453) 
9:30 a.m.
Biorthogonal Wavelets with 6fold Axial Symmetry for Hexagonal Data and Triangle Surface Multiresolution Processing.
Qingtang Jiang*, University of Missouri  St. Louis
(104742274) 
10:00 a.m.
Fast computation of spectral centroids.
Matthew Fickus*, Air Force Institute of Technology
Melody L. Massar, Air Force Institute of Technology
(10474213) 
10:30 a.m.
Kaczmarz algorithms and frames.
Wojciech Czaja*, University of Maryland, College Park
James H. Tanis, University of Maryland, College Park
(104743491) 
11:00 a.m.
Wiener's Lemma and memory localization.
Ilya A Krishtal*, Northern Illinois University
(104743295)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on Differential Geometry and Its Applications, II
Room 341, Altgeld Hall
Organizers:
Stephanie B. Alexander, University of Illinois at UrbanaChampaign stephanieb.alexander@gmail.com
Jianguo Cao, University of Notre Dame cao.7@nd.edu

8:30 a.m.
Nonuniform Thickness.
Oguz C. Durumeric*, University of Iowa
(104753321) 
9:00 a.m.
Boundary effects and rigidity on compact manifolds with nonnegative or positive scalar curvature.
Xiaodong Wang*, Michigan State University
(104753357) 
9:30 a.m.
Scalar Curvature Behavior of KählerRicci Flow.
Zhou Zhang*, University of Michigan, at Ann Arbor
(104753279) 
10:00 a.m.
Relative isometric embeddings of Riemannian manifolds.
Mohammad Ghomi*, Georgia Tech
Robert E Greene, UCLA
(104753296) 
10:30 a.m.
Volume growth and the topology of manifolds with nonnegative Ricci curvature.
Michael Munn*, City University of New York
(10475337) 
11:00 a.m.
Collapsing manifoldswithboundary.
Jeremy Wong*, University of Georgia
(104753405)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on The Interface Between Number Theory and Dynamical Systems, II
Room 245, Altgeld Hall
Organizers:
Florin Boca, University of Illinois at UrbanaChampaign fboca@math.uiuc.edu
Jeffrey Lagarias, University of Michigan lagarias@umich.edu
Kenneth Stolarsky, University of Illinois at UrbanaChampaign stolarsk@math.uiuc.edu

8:30 a.m.
Sturmian adic dynamical systems in the SternBrocot (Farey) diagram.
Karl Petersen*, University of North Carolina at Chapel Hill
(10473720) 
9:00 a.m.
Palindromic properties of infinite sequences with applications to Number Theory.
Amy Glen*, The Mathematics Institute, Reykjavik University
(104711206) 
9:30 a.m.
Division Point Measures Related to Subdivisions.
Jeanette Olli*, University of North Carolina at Chapel Hill
(104737192) 
10:00 a.m.
The MeanMedian Map.
Marc Chamberland*, Grinnell College
(104737264) 
10:30 a.m.
Critical orbits in arithmetic dynamics.
Rafe Jones*, College of the Holy Cross
(104711394) 
11:00 a.m.
Multidimensional polynomial iterations and Ismail's qdiscriminants.
Khang Tran*, University of Illinois
Kenneth B Stolarsky, University of Illinois
(104711156)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on qSeries and Partitions, II
Room 147, Altgeld Hall
Organizers:
Bruce Berndt, University of Illinois at UrbanaChampaign berndt@math.uiuc.edu
Ae Ja Yee, Pennsylvania State University yee@math.psu.edu

8:30 a.m.
Generalized Borcherds products and Ramanujan's mock theta function $\omega(q)$.
Ken Ono*, U. Wisconsin, Madison
(10471187) 
9:00 a.m.
Multiplicative qhypergeometric series arising from real quadratic fields.
Kathrin Bringmann*, University of Cologne
(104705310) 
9:30 a.m.
Asymptotics for cranks and ranks of partitions.
Karl Mahlburg*, Massachusetts Institute of Technology
Kathrin Bringmann, University of Cologne, Germany
Rob Rhoades, Ecole Polytechnique Federale de Lausanne, Switzerland
(104711251) 
10:00 a.m.
Asymptotics and transformations of some Mordell integrals.
Richard J. McIntosh*, University of Regina, Saskatchewan, Canada
(104711250) 
10:30 a.m.
Partition identities that arise from the universal mock theta functions.
SoonYi Kang*, Korea Advanced Institute of Science and Technology
(104711433) 
11:00 a.m.
Applications of differential equations for {E}isenstein series on level two subgroups of the modular group.
Tim Huber*, Iowa State University
(104711396)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on Concrete Aspects of Real Positive Polynomials, II
Room 162, Noyes Lab
Organizers:
Victoria Powers, Emory University vicki@mathcs.emory.edu
Bruce Reznick, University of Illinois at UrbanaChampaign reznick@illinois.edu

8:30 a.m.
Polynomials nonnegative on the strip.
Murray A. Marshall*, Department of Mathematics and Statistics, University of Saskatchewan
(10471460) 
9:00 a.m.
Positivity in power series rings.
Salma Kuhlmann*, University of Saskatchewan, Canada
J. Cimpric, University of Ljubljana, Slovenia
M. Marshall, University of Saskatchewan
(104712331) 
9:30 a.m.
Cubic Column Relations in Truncated Moment Problems.
Raúl E Curto*, The University of Iowa
(104747427) 
10:00 a.m.
A new, simpler finitary construction of the real closure of a discrete ordered field.
Charles N. Delzell*, Louisiana State University
(104712428) 
10:30 a.m.
Pólya's Theorem with Zeros.
Mari F. Castle*, Kennesaw State University
Victoria Powers, Emory University
Bruce Reznick, University of Illinois, Urbana
(104714381) 
11:00 a.m.
Pólya's Theorem, Applications and Generalizations.
Victoria Powers*, Emory University
(104714344)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.10:50 a.m.
Special Session on The Logic and Combinatorics of Algebraic Structures, II
Room 203, Noyes Lab
Organizers:
John Snow, Concordia University john.snow@cune.edu
Jeremy Alm, Illinois College alm.academic@gmail.com

8:30 a.m.
Affine complete $G$sets.
Peter Mayr*, JKU Linz, Austria
Andras Pongracz, Eotvos Lorand University
(10470840) 
9:00 a.m.
The Grothendieck semiring of the group of complex roots of unity.
Vinicius Cifu Lopes*, Department of Mathematics, University of Illinois at UrbanaChampaign
(10470329) 
9:30 a.m.
Categorical Equivalence of Unary Algebras.
Clifford Bergman*, Iowa State University, Department of Mathematics
(104708109) 
10:00 a.m.
Free algebras and hereditarily closed families.
Joel Berman*, University of Illinois at Chicago
(104708145) 
10:30 a.m.
Residually finite varieties.
Keith A. Kearnes*, University of Colorado
Ross D. Willard, University of Waterloo
(10470857)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on Graph Theory, II
Room 161, Noyes Lab
Organizers:
Alexander V. Kostochka, University of Illinois at UrbanaChampaign kostochk@math.uiuc.edu
Douglas B. West, University of Illinois at UrbanaChampaign west@math.uiuc.edu

8:30 a.m.
Injective colorings of sparse graphs.
Daniel W Cranston*, DIMACS, Rutgers
SeogJin Kim, Konkuk University, Seoul, Korea
Gexin Yu, College of William & Mary, Williamsburg, VA
(104705154) 
9:00 a.m.
kfold list colorings with Hall's condition.
Jeno Lehel*, The University of Memphis
(104705473) 
9:30 a.m.
The rankchromatic number and the rankflow number.
Luis A Goddyn*, Simon Fraser University
(104705414) 
10:00 a.m.
Graph Packing, Game Coloring and $2$Coloring Number.
H. A. Kierstead*, Arizona State University
A. V. Kostochka, University of Illinois, Urbana and Institute of Mathematics, Novosibirsk
(104705401) 
10:30 a.m.
On Saturation Numbers.
Ronald J. Gould*, Emory University, Atlanta, GA 30322
(104705101) 
11:00 a.m.
Saturation Numbers.
Ralph Faudree*, University of Memphis
(10470552)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on Probabilistic and Extremal Combinatorics, II
Organizers:
Jozsef Balogh, University of Illinois at UrbanaChampaign jobal@math.uiuc.edu
Zoltan Furedi, University of Illinois at UrbanaChampaign zfuredi@math.uiuc.edu

8:30 a.m.
Extremal problems for multipartite graphs.
Rahil Baber, University College London
J Robert Johnson, Queen Marys University of London
John Talbot*, University College London
(104705260) 
9:00 a.m.
On AvoiderEnforcer games.
József Balogh, University of Illinois, UrbanaChampaign
Ryan Martin*, Iowa State University
(104705256) 
9:30 a.m.
Bilinear and Quadratic Variants on the LittlewoodOfford Problem.
Kevin P Costello*, Georgia Institute of Technology
(104705441) 
10:00 a.m.
Optimal Random Matchings on Trees and Applications.
Bela Csaba*, Dept. of Mathematics, Western Kentucky University
Ali Shokoufandeh, Dept. of Computer Science, Drexel University
Jeff Abrahamson, Dept. of Computer Science, Drexel University
(104705266) 
10:30 a.m.
Extremal problems for counting homomorphisms.
Jonathan Cutler*, Montclair State University
A. J. Radcliffe, University of NebraskaLincoln
(104705276) 
11:00 a.m.
A simple entropy proof of the KahnLovasz theorem.
Andrew J. Radcliffe*, University of NebraskaLincoln
Jonathan Cutler, Montclair State University
(104705245)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on Geometric Function Theory and Analysis on Metric Spaces, II
Room 447, Altgeld Hall
Organizers:
Sergiy Merenkov, University of Illinois at UrbanaChampaign merenkov@uiuc.edu
Jeremy Taylor Tyson, University of Illinois at UrbanaChampaign tyson@math.uiuc.edu
JangMei Wu, University of Illinois at UrbanaChampaign wu@math.uiuc.edu

8:30 a.m.
Intrinsic regularity of subRiemannian minimal surfaces in the first Heisenberg group.
Luca Capogna*, University of Arkansas
(104735242) 
9:00 a.m.
Wolfe's theorem in Banach spaces.
M. A. Snipes*, University of Michigan
(104730444) 
9:30 a.m.
Metric currents and differentiable structures.
Marshall Williams*, University of Michigan
(104728486) 
10:00 a.m.
Modulus of measures and conformal dimension.
Hrant Hakobyan*, University of Toronto
Ilia Binder, University of Toronto
(104728448) 
10:30 a.m.
Uniformization of Sierpinski carpets.
Mario Bonk*, University of Michigan
(104730402) 
11:00 a.m.
Quasiregular mappings to generalized manifolds.
Kai Rajala*, University of Jyvaskyla
Jani Onninen, Syracuse University
(104730127)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:20 a.m.
Special Session on Mathematical Visualization, II
Room 102, Altgeld Hall
Organizers:
George K. Francis, University of Illinois at UrbanaChampaign gfrancis@uiuc.edu
Louis H. Kauffman, University of Illinois at Chicago kauffman@uic.edu
Dennis Martin Roseman, University of Iowa roseman@math.uiowa.edu
Andrew J. Hanson, Indiana University hanson@cs.indiana.edu

8:30 a.m.
Geometric Generation of Permutation Sequences.
Dennis M Roseman*, Department of Mathematics, University of Iowa
(104751108) 
9:00 a.m.
Archytas of Tarentum: Savior to the Delians.
Colin B. P. McKinney*, University of Iowa
(104701103) 
9:30 a.m.
Interactive Geometry Illustrations for Teaching, Research, and Publication.
Thomas F. Banchoff*, Brown University
Michael Schwarz, University of Illinois, Urbana
(104751287) 
10:00 a.m.
An Explicit Eversion of the 2sphere.
J Scott Carter*, University of South Alabama
(10475778) 
10:30 a.m.
Stability of the Fold.
Herbert Edelsbrunner*, Duke University
(10475185) 
11:00 a.m.
It's Nice To See This Stuff Actually Used For Something.
John C. Hart*, University of Illinois, Urbana
(104751167)

8:30 a.m.

Saturday March 28, 2009, 8:30 a.m.11:25 a.m.
Session on Session for Contributed Papers, II
Room 304, Noyes Lab

8:30 a.m.
A Construction of an Infinite Family of 2Arc Transitive Polygonal Graphs of Arbitrary Odd Girth.
Eric A. Swartz*, The Ohio State University
(104705255) 
8:45 a.m.
Some useful operations and their applications.
Arman Shokrollahi*, Ramanujan Institute for Advanced Study in Mathematics
(10476808) 
9:00 a.m.
Potentially $H$bigraphic sequences.
John Roger Schmitt*, Middlebury College
Michael Ferrara, U. Akron
Michael Jacobson, U. Colorado, Denver
Mark Siggers, Simon Fraser U.
(104705114) 
9:15 a.m.
Pfaffian Orientations in Cubic Polyhex Graphs on the Torus and the Klein Bottle.
Ye Dong*, West Virginia University
(104705283) 
9:30 a.m.
A Characterization of Almost CIS Graphs.
Yezhou Wu*, West Virginia University
Wenan Zang, University of Hong Kong
CunQuan Zhang, West Virginia University
(104705368) 
9:45 a.m.
On 2local isometries on continuous vectorvalued function spaces.
Hasan A AlHalees*, Saginaw Valley State University
Richard J Fleming, Central Michigan University
(10474736) 
10:00 a.m.
Boundedness on inhomogeneous Lipschitz spaces of fractional integrals, singular integrals and hypersingular integrals associated to nondoubling measures.
A. Eduardo Gatto*, DePaul University
(10472855) 
10:15 a.m.
A More Accurate Pooled Standard Deviation.
Craig M. Browne*, Edgewood, New Mexico, USA
(104762178) 
10:30 a.m.
Independence number of 2factorplustriangles graphs.
Jennifer Vandenbussche*, Southern Polytechnic State University
Douglas B. West, University of Illinois at UrbanaChampaign
(104705126) 
10:45 a.m.
Minimizing the number of episodes on a species tree  an extension of Gallai's theorem on intervals.
Eva Czabarka*, University of South Carolina
Laszlo A Szekely, University of South Carolina
Todd J Vision, University of North Carolina
(104705191) 
11:00 a.m.
The sign of a permutation of a multiset and Lozanić's Triangle.
Stephen G. Hartke*, University of NebraskaLincoln
A. J. Radcliffe, University of NebraskaLincoln
Raghunath Tewari, University of NebraskaLincoln
(104705378) 
11:15 a.m.
The nDimensional Pythagorean Theorem via the Divergence Theorem.
Noah H Rhee*, University of MissouriKansas City
Larry Eifler, University of MissouriKansas City
(10475162)

8:30 a.m.

Saturday March 28, 2009, 9:00 a.m.11:50 a.m.
Special Session on Number Theory in the Spirit of Erdos, II
Room 143, Altgeld Hall
Organizers:
Kevin Ford, University of Illinois at UrbanaChampaign ford@math.uiuc.edu
A. J. Hildebrand, University of Illinois at UrbanaChampaign hildebr@math.uiuc.edu

9:00 a.m.
The HardyLittlewood Prime Tuple Conjecture and Gaps Between Consecutive Primes.
Dan Goldston*, San Jose State University
(104711430) 
10:00 a.m.
Some Conjectures of Erdős on Consecutive Integers.
D. A. Goldston, San Jose State University
S. W. Graham*, Central Michigan University
J. Pintz, Renyi Mathematical Institute of the Hungary Academy of Sciences
C. Y. Yıldırım, Bogazici University
(10471142) 
10:30 a.m.
Lattice Points Close to a Smooth Curve and Applications.
Ognian Trifonov*, University of South Carolina
(104711367) 
11:00 a.m.
Sums and Products in C[x].
Ernie Croot*, Georgia Tech
(104711350) 
11:30 a.m.
Wieferich pairs and Barker sequences.
Michael J. Mossinghoff*, University of South Carolina and Davidson College
(104711285)

9:00 a.m.

Saturday March 28, 2009, 9:00 a.m.11:20 a.m.
Special Session on Hyperbolic Geometry and Teichmuller Theory, II
Room 443, Altgeld Hall
Organizers:
Jason Deblois, University of Illinois at Chicago jdelbois@math.uic.edu
Richard P. Kent, IV, Brown University rpkfour@gmail.com
Christopher J. Leininger, University of Illinois at UrbanaChampaign clein@math.uiuc.edu

9:00 a.m.
Moduli spaces of hyperbolic manifolds.
Richard Canary*, University of Michigan
Peter Storm, University of Pennsylvania
(104757291) 
9:30 a.m.
Quasiconvexity of balls in Teichmueller space.
Anna B Lenzhen*, ANR Caen, France
Rafi Kasra, University of Oklahoma
(104751349) 
10:00 a.m.
Rank of the fundamental group of hyperbolic mapping tori.
Ian Biringer, University of Chicago
Juan Souto*, University of Michigan
(104751105) 
10:30 a.m.
Modular character varieties of knots.
Ben Klaff*, University of IllinoisChicago
Peter B. Shalen, University of IllinoisChicago
(104757387) 
11:00 a.m.
Dynamics of Generalized Interval Exchanges.
Vaibhav Gadre*, Caltech
(104737360)

9:00 a.m.

Saturday March 28, 2009, 9:00 a.m.11:20 a.m.
Special Session on Geometric Group Theory, II
Room 445, Altgeld Hall
Organizers:
Sergei V. Ivanov, University of Illinois at UrbanaChampaign ivanov@math.uiuc.edu
Ilya Kapovich, University of Illinois at UrbanaChampaign kapovich@math.uiuc.edu
Igor Mineyev, University of Illinois at UrbanaChampaign mineyev@math.uiuc.edu
Paul E. Schupp, University of Illinois at UrbanaChampaign schupp@math.uiuc.edu

9:00 a.m.
Combinatorial models of Julia sets and Group Theory.
Volodymyr Nekrashevych*, Texas A&M University
(104720418) 
10:00 a.m.
Combination and separation.
J F Manning*, SUNY at Buffalo
E MartínezPedroza, McMaster University
(104720322) 
10:30 a.m.
Actions of Maximal Growth.
Yuri A. Bahturin, Memorial University, Canada
Alexander Y. Olshanskii*, Vanderbilt University
(104720196) 
11:00 a.m.
Ranks of subgroups of free groups.
D. B. McReynolds*, University of Chicago
Larsen Louder, University of Michigan
(104720461)

9:00 a.m.

Saturday March 28, 2009, 9:00 a.m.10:55 a.m.
Special Session on Algebraic Methods in Statistics and Probability, II
Room 204, Noyes Lab
Organizers:
Marlos A. G. Viana, University of Illinois at Chicago viana@uic.edu

9:00 a.m.
On Riesz and Wishart Distributions associated with decomposable undirected graphs.
Steen Andersson*, Indiana University
Thomas Klein, Zentrum Mathematik, Munich, Germany
(104762115) 
9:30 a.m.
Some results on connectivity of fibers with a subset of a Markov basis.
Akimichi Takemura*, Graduate School of Information Science and Technology, University of Tokyo
Hisayuki Hara, Department of Technology Management for Innovation, University of Tokyo
(10476250) 
10:00 a.m.
Maximal Invariants Over Symmetric Cones.
Ahmad Saeid Yasamin*, Statistical and Applied Mathematical Sciences Institute
(10476227) 
10:30 a.m.
Smoothness of Gaussian conditional independence models.
Mathias Drton, University of Chicago
Han Xiao*, University of Chicago
(104762188)

9:00 a.m.

Saturday March 28, 2009, 9:00 a.m.11:20 a.m.
Special Session on Operator Algebras and Operator Spaces, II
Room 145, Altgeld Hall
Organizers:
ZhongJin Ruan, University of Illinois at UrbanaChampaign ruan@math.uiuc.edu
Florin P. Boca, University of Illinois at UrbanaChampaign fboca@math.uiuc.edu
Marius Junge, University of Illinois at UrbanaChampaign junge@math.uiuc.edu

9:00 a.m.
Hyperrigid operator systems.
William Arveson*, University of California, Berkeley
(104747194) 
10:00 a.m.
Classifying Hilbert Modules.
Nate Brown*, Penn State University
(104746205) 
10:30 a.m.
On AF embeddability of continuous fields.
Marius Dadarlat*, Purdue University
(104746346) 
11:00 a.m.
Perturbations of Finite Rank Maps with applications to Nuclear C*algebras.
Caleb A Eckhardt*, University of Illinois at UrbanaChampaign
(104746459)

9:00 a.m.

Saturday March 28, 2009, 9:00 a.m.11:25 a.m.
Special Session on Holomorphic and CR Mappings, II
Room 343, Altgeld Hall
Organizers:
John P. D'Angelo, University of Illinois at UrbanaChampaign jpda@math.uiuc.edu
Jiri Lebl, University of Illinois at UrbanaChampaign jlebl@math.uiuc.edu
Alex Tumanov, University of Illinois at UrbanaChampaign tumanov@math.uiuc.edu

8:30 a.m.
A note on the weak holomorphicity and analyticity of distributions.
Chiachi Tung*, Minnesota State University, Mankato
(104732450) 
9:00 a.m.
Sharp Estimates for the $\bar{\partial}$Neumann Problem on Regular Coordinate Domains.
Jaeseong Cho*, Department of Mathematics, Purdue University
(104732270) 
9:30 a.m.
Examples of sharp subelliptic estimates for the $\bar{\partial}$Neumann problem.
David W. Catlin*, Purdue University
(104732361) 
10:00 a.m.
Bergman versus Szegö via conformal mapping.
Kenneth D Koenig*, Ohio State University
Loredana Lanzani, University of Arkansas
(104730143) 
10:30 a.m.
CauchyFantappié singular integrals for strongly pseudoconvex domains of class $C^2$.
Loredana Lanzani*, University of Arkansas
Elias M. Stein, Princeton University
(104732243) 
11:00 a.m.
Duality between Hardy spaces on dual domains in complex projective space.
David E Barrett*, University of Michigan
(104732363)

8:30 a.m.

Saturday March 28, 2009, 9:30 a.m.11:20 a.m.
Special Session on Topological Dynamics and Ergodic Theory, II
Room 345, Altgeld Hall
Organizers:
Alica Miller, University of Louisville amiller@erdos.math.louisville.edu
Joseph Rosenblatt, University of Illinois at UrbanaChampaign rosnbltt@math.uiuc.edu

9:30 a.m.
Measure preserving actions of WM groups and Hindman's theorem.
Vitaly Bergelson*, Ohio State University
(104737275) 
10:30 a.m.
What does Birkhoff's Ergodic Theorem mean for a big finite set?
Lev Glebsky, Independent University of San Luis Potosi, Mexico
Evgeny I Gordon*, Eastern Illinois University
C Ward Henson, University of Illinois at Urbana  Champaign
(104737197) 
11:00 a.m.
Determining transformations by averaging methods.
Joseph Rosenbaltt*, University of Illinois at UrbanaChampaign
(104728112)

9:30 a.m.

Saturday March 28, 2009, 11:40 a.m.12:30 p.m.
Invited Address
Complex interpolation between Hilbert, Banach and operator spaces.
Room 314, Altgeld Hall
Gilles Pisier*, Texas A&M University
(10470002) 
Saturday March 28, 2009, 2:00 p.m.2:50 p.m.
Invited Address
On the classification of topological field theories.
Room 314, Altgeld Hall
Jacob Lurie*, Massachusetts Institute of Technology
(10475503) 
Saturday March 28, 2009, 3:00 p.m.5:50 p.m.
Special Session on Algebra, Geometry and Combinatorics, II
Room 217, Noyes Lab
Organizers:
Rinat Kedem, University of Illinois at UrbanaChampaign rinat@uiuc.edu
Alexander T. Yong, University of Illinois at UrbanaChampaign ayong@uiuc.edu

3:00 p.m.
The geometry and combinatorics of some special subvarieties of the flag variety.
Julianna Tymoczko*, University of Iowa
(104714470) 
3:30 p.m.
Cluster fans for quivers.
Calin Ioan Chindris*, University of Iowa
(104716177) 
4:00 p.m.
Poisson Geometry of Directed Networks.
Michael Gekhtman*, University of Notre Dame
Michael Shapiro, Michigan State University
Alek Vainshtein, University of Haifa
(104705181) 
4:30 p.m.
Higher Auslander algebras, cyclic polytopes, and analogues of tropical cluster algebras.
Steffen Oppermann, Norges teknisknaturvitenskapelige universitet
Hugh Thomas*, University of New Brunswick
(104716384) 
5:00 p.m.
Positivity results for cluster algebras.
Gregg Musiker, MIT
Ralf Schiffler, University of Connecticut
Lauren Williams*, Harvard University
(104705412) 
5:30 p.m.
Qsystems and Cluster Positivity.
Philippe R Di Francesco*, Institut de Physique Theorique, CEA Saclay, France
(104705267)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:45 p.m.
Special Session on Topological Field Theories, Representation Theory, and Algebraic Geometry, III
Room 347, Altgeld Hall
Organizers:
Thomas Nevins, University of Illinois at UrbanaChampaign nevins@uiuc.edu
David BenZvi, University of Texas at Austin benzvi@math.utexas.edu

3:00 p.m.
BPS invariants of CalabiYau threefolds.
Sheldon H Katz*, University of Illinois
(104714483) 
4:00 p.m.
On GW/DT correspondence with descendants.
Alexei Oblomkov*, Princeton
Andrei Okounkov, Princeton
(104714323)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Local and Homological Methods in Commutative Algebra, III
Room 165, Noyes Lab
Organizers:
Florian Enescu, Georgia State University fenescu@gsu.edu
Sandra Spiroff, University of Mississippi spiroff@olemiss.edu

3:00 p.m.
Arithmetically CohenMacaulay bundles on hypersurfaces.
Mohan N Kumar*, Washington University in Saint Louis
(10471482) 
3:30 p.m.
Free summands of syzygies and CohenMacaulay rings.
Bart Snapp*, Coastal Carolina University
(104713123) 
4:00 p.m.
On the Strong Direct Summand Conjecture.
Jason McCullough*, University of Illinois at UrbanaChampaign
(104713179) 
4:30 p.m.
Real affine varieties and obstruction theories.
Satya Mandal*, University of Kansas
Albert Sheu, University of Kansas
(10471383)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Number Theory in the Spirit of Erdos, III
Room 143, Altgeld Hall
Organizers:
Kevin Ford, University of Illinois at UrbanaChampaign ford@math.uiuc.edu
A. J. Hildebrand, University of Illinois at UrbanaChampaign hildebr@math.uiuc.edu

3:00 p.m.
Open Problems on Covering Systems.
Michael Filaseta*, University of South Carolina
(104711286) 
3:30 p.m.
Covering systems old and new.
Pace P. Nielsen*, The University of Iowa
(104711359) 
4:00 p.m.
On sequences of integers no one of which divides the product of three others.
Tsz Ho Chan*, University of Memphis
Ervin Gyory, Renyi Institute
Andras Sarkozy, Eotvos Lorand University
(10471146) 
4:30 p.m.
Sets with Integral Distance in Finite Fields.
Alex Iosevich, University of Missouri, Columbia, MO
Igor Shparlinski, Dept. Computing, Macquarie University, Sydney, Australia
Maosheng Xiong*, Pennsylvania State University
(104711257)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Time, Scale and Frequency Methods in Harmonic Analysis, III
Room 141, Altgeld Hall
Organizers:
Richard S. Laugesen, University of Illinois at UrbanaChampaign Laugesen@illinois.edu
Darrin M. Speegle, St. Louis University speegled@slu.edu

3:00 p.m.
Frequencyscale frames and the solution of the Mexican hat problem.
H.Q. Bui, University of Canterbury
R. S. Laugesen*, University of Illinois, UrbanaChampaign
(104742277) 
3:30 p.m.
Discussion 
4:00 p.m.
Exponential decay of dispersion managed solitons.
M. Burak Erdogan*, University of Illinois Urbana Champaign
Dirk Hundermark, University of Illinois Urbana Champaign
YoungRan Lee, Sogang University
(104735347) 
4:30 p.m.
Centerstable manifolds for orbitally unstable evolution equations.
Wilhelm Schlag*, University of Chicago
(104735332)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Differential Geometry and Its Applications, III
Room 341, Altgeld Hall
Organizers:
Stephanie B. Alexander, University of Illinois at UrbanaChampaign stephanieb.alexander@gmail.com
Jianguo Cao, University of Notre Dame cao.7@nd.edu

3:00 p.m.
On uniqueness and nonuniqueness of souls.
Igor Belegradek*, Georgia Tech
Slawomir Kwasik, Tulane University
Reinhard Schultz, University of California, Riverside
(10475367) 
3:30 p.m.
A New Convergence for Riemannian Manifolds.
Christina Sormani*, Lehman College and CUNY Graduate Center
Stefan Wenger, University of Illinois at Chicago
(104758133) 
4:00 p.m.
Convexity in subRiemannian Geometry and Its Applications.
Kanghai Tan*, Science School, Nanjing University of Science & Technology
(104753352) 
4:30 p.m.
Rigidity of conformally compact manifolds with the round sphere as the conformal infinity.
Satyaki Dutta, N/A
Mohammad Javaheri*, Trinity College
(10475380)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on The Interface Between Number Theory and Dynamical Systems, III
Room 245, Altgeld Hall
Organizers:
Florin Boca, University of Illinois at UrbanaChampaign fboca@math.uiuc.edu
Jeffrey Lagarias, University of Michigan lagarias@umich.edu
Kenneth Stolarsky, University of Illinois at UrbanaChampaign stolarsk@math.uiuc.edu

3:00 p.m.
Polynomial extensions of Szemeredi's theorem on arithmetic progressions and ergodic theory.
Vitaly Bergelson*, Ohio State University
(104711284) 
4:00 p.m.
Hardy field configurations on dense subsets of the integers.
Nikos Frantzikinakis*, University of Memphis
(104737439) 
4:30 p.m.
The MultiplicationConvolution Dynamical System.
Machiel van Frankenhuijsen*, Utah Valley University
(10471181)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Hyperbolic Geometry and Teichmuller Theory, III
Room 443, Altgeld Hall
Organizers:
Jason Deblois, University of Illinois at Chicago jdelbois@math.uic.edu
Richard P. Kent, IV, Brown University rpkfour@gmail.com
Christopher J. Leininger, University of Illinois at UrbanaChampaign clein@math.uiuc.edu

3:00 p.m.
The Local Topology of Deformation Spaces of Kleinian Surface Groups.
Aaron D Magid*, University of Michigan
(10475772) 
3:30 p.m.
Perturbed, Genus One Scherk Surfaces and Their Limits.
Casey Douglas*, Rice University
(10475395) 
4:00 p.m.
Uniform uniform exponential growth of subgroups of the mapping class group.
Johanna Mangahas*, University of Michigan Ann Arbor
(10475191) 
4:30 p.m.
Asymptotics for pseudoAnosovs in the Teichmüller lattice.
Joseph Maher*, Oklahoma State
(10475730)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Topological Dynamics and Ergodic Theory, III
Room 345, Altgeld Hall
Organizers:
Alica Miller, University of Louisville amiller@erdos.math.louisville.edu
Joseph Rosenblatt, University of Illinois at UrbanaChampaign rosnbltt@math.uiuc.edu

3:00 p.m.
Some properties of the full groups of measurepreserving equivalence relations.
Vladimir Pestov*, University of Ottawa
(104737462) 
3:30 p.m.
Fractals a la Furstenberg and Gromov.
Ethan Akin*, The City College of New York (CCNY)
(104737301) 
4:00 p.m.
Simple discrete 3D stirring models.
Judy Anita Kennedy*, Lamar University
Barry Peratt, Winona State University
(104737345) 
4:30 p.m.
A variational principle for subset.
Wen Huang*, University of Science and Technology of China
(104737342)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on qSeries and Partitions, III
Room 147, Altgeld Hall
Organizers:
Bruce Berndt, University of Illinois at UrbanaChampaign berndt@math.uiuc.edu
Ae Ja Yee, Pennsylvania State University yee@math.psu.edu

3:00 p.m.
Sums of squares, Schur functions, and multiple basic hypergeometric series.
Stephen C. Milne*, The Ohio State University
(104711432) 
3:30 p.m.
General WPBailey Chains.
Jimmy Mc Laughlin*, West Chester University
Peter Zimmer, West Chester University
(10473386) 
4:00 p.m.
A Multiple Weak Bailey Lemma and Some Applications.
Hasan Coskun*, Texas A&M UniversityCommerce
(104705474) 
4:30 p.m.
A Combinatorial Interpretation of a General Case of a Fine Identity.
Michael J Rowell*, Pacific University
(104705117)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Concrete Aspects of Real Positive Polynomials, III
Room 162, Noyes Lab
Organizers:
Victoria Powers, Emory University vicki@mathcs.emory.edu
Bruce Reznick, University of Illinois at UrbanaChampaign reznick@illinois.edu

3:00 p.m.
Exact certification in global polynomial optimization via sumsofsquares of rational functions with rational coefficients.
Erich Kaltofen*, North Carolina State University
Bin Li, Key Lab. of Math. Mechanization, AMSS, Beijing 100190, China
Zhengfeng Yang, Shanghai Key Lab. of Trustworthy Comput., SEI, East China Normal University, Shanghai 200062, China
Lihong Zhi, Key Lab. of Math. Mechanization, AMSS, Beijing 100190, China
(10471276) 
3:30 p.m.
Polynomial hierarchy, Betti numbers and a real analogue of Toda's theorem.
Saugata Basu*, Department of Mathematics, Purdue University
Thierry Zell, Department of Mathematics and Computing Sciences, LenoirRhyne University
(104714400) 
4:00 p.m.
Amoebas and coamoebas, relationships and similarities.
Mounir Nisse*, University Pierre et Marie Curie  Paris 6, IMJ (UMR 7586)
(10471477) 
4:30 p.m.
Positivity properties of Schoenberg's quadratic forms  a recurrent theme.
Kenneth B Stolarsky*, University of Illinois
(104712162)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Nonlinear Partial Differential Equations and Applications, II
room 241, Altgeld Hall
Organizers:
Igor Kukavica, University of Southern California kukavica@usc.edu
Anna L. Mazzucato, Pennsylvania State University mazzucat@math.psu.edu

3:00 p.m.
Nonlinear instability for the critically disipative quasigeostrophic equation.
Susan Friedlander*, University of Southern California
Natasa Pavlovic, U of TexasAustin
Vlad Vicol, University of Southern California
(104776140) 
3:30 p.m.
Vanishing viscosity and the accumulation of vorticity on the boundary.
James P Kelliher*, University of California, Riverside
(104776404) 
4:00 p.m.
Strong Solutions to a Nonlinear Fluid Structure Interaction System.
Amjad Tuffaha*, University of Southern California
Igor Kukavica, University of Southern California
Mohammed Ziane, University of Southern California
(104735469) 
4:30 p.m.
El Nino Southern Oscillation as Sporadic Oscillations between Metastable States.
Tian Ma, Sichuan University
Shouhong Wang*, Indiana University
(104735113)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on The Logic and Combinatorics of Algebraic Structures, III
Room 203, Noyes Lab
Organizers:
John Snow, Concordia University john.snow@cune.edu
Jeremy Alm, Illinois College alm.academic@gmail.com

3:00 p.m.
The complexity of ppdefinability.
Ross Willard*, University of Waterloo
(104703158) 
3:30 p.m.
Algebraic conditions forcing NPcompleteness of the Constraint Satisfaction Problem.
Petar Markovic*, University of Novi Sad, Serbia
Ralph McKenzie, Vanderbilt University
Matthew Nickodemus, Vanderbilt University
(104708304) 
4:00 p.m.
Algebras of Bounded Width.
Petar Markovic, University of Novi Sad
Ralph McKenzie, Vanderbilt University
Matthew Nickodemus*, Vanderbilt University
(104703395) 
4:30 p.m.
Algebra applied to the study of constraint satisfaction problems produces spectacular results both in universal algebra and on the side of computational complexity: a survey of recent work.
Ralph N McKenzie*, Vanderbilt University
Petar Markovic, Vanderbilt University
Matthew Nickodemus, Vanderbilt University
(104708153)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Geometric Group Theory, III
Room 445, Altgeld Hall
Organizers:
Sergei V. Ivanov, University of Illinois at UrbanaChampaign ivanov@math.uiuc.edu
Ilya Kapovich, University of Illinois at UrbanaChampaign kapovich@math.uiuc.edu
Igor Mineyev, University of Illinois at UrbanaChampaign mineyev@math.uiuc.edu
Paul E. Schupp, University of Illinois at UrbanaChampaign schupp@math.uiuc.edu

3:00 p.m.
Characterizing the solvability of the conjugacy problem in freebyfree and [free abelian]byfree groups.
Enric Ventura*, Universitat Politecnica Catalunya
(104720435) 
4:00 p.m.
Growth in BaumslagSolitar groups: Asymptotics.
Eric M Freden*, Southern Utah University
Jared Adams, Southern Utah University
(104720364) 
4:30 p.m.
Generalized expanders.
Lucas Sabalka*, Binghamton University
Jerry Kaminker, University of California, Davis
(104754420)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:55 p.m.
Special Session on Algebraic Methods in Statistics and Probability, III
Room 204, Noyes Lab
Organizers:
Marlos A. G. Viana, University of Illinois at Chicago viana@uic.edu

3:00 p.m.
Alternative parametrizations and reference priors for decomposable discrete graphical models.
Helene M Massam*, York University, Toronto, Canada
(10476224) 
3:30 p.m.
Qualitative inequalities for squared partial correlations of a Gaussian random vector.
Sanjay Chaudhuri*, Department of Statistics and Applied Probability, National University of Singapore
(104762203) 
4:00 p.m.
Trek separation for Gaussian graphical models.
Seth Sullivant*, North Carolina State University
Kelli Talaska, University of Michigan
(10476249) 
4:30 p.m.
Algebraic statistics of p1 random graph models.
Stephen Fienberg, Carnegie Mellon University
Sonja Petrović*, Univeristy of Illinois at Chicago
Alessandro Rinaldo, Carnegie Mellon University
(104713163)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Graph Theory, III
Room 161, Noyes Lab
Organizers:
Alexander V. Kostochka, University of Illinois at UrbanaChampaign kostochk@math.uiuc.edu
Douglas B. West, University of Illinois at UrbanaChampaign west@math.uiuc.edu

3:00 p.m.
Maximal Independent Sets in Adjacent Levels of the Cube.
Dwight Duffus*, Mathematics & Computer Science Department, Emory University
Peter Frankl, Tokyo, Japan
Vojtech Rodl, Mathematics & Computer Science Department, Emory University
(104705312) 
3:30 p.m.
Partitioning Subset Lattices into Intervals.
William T. Trotter*, Georgia Institute of Technology
(104705263) 
4:00 p.m.
Diamondfree families of subsets.
Jerrold R. Griggs*, University of South Carolina
(104705456) 
4:30 p.m.
On the degree of regularity of a specific linear equation.
André E. Kézdy*, University of Louisville
Hunter Snevily, University of Idaho at Moscow
(104705292)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Probabilistic and Extremal Combinatorics, III
Room 163, Noyes Lab
Organizers:
Jozsef Balogh, University of Illinois at UrbanaChampaign jobal@math.uiuc.edu
Zoltan Furedi, University of Illinois at UrbanaChampaign zfuredi@math.uiuc.edu

3:00 p.m.
It's a long way to recurrence  an extremal problem in the Abelian Sandpile Model.
László Babai*, University of Chicago
Igor Gorodezky, Cornell University
Allie Shapiro, Toyota Technological Institute  Chicago
(104705434) 
3:30 p.m.
Random ErdosKoRado.
Jozsef Balogh, UIUC
Tom Bohman, CMU
Dhruv Mubayi*, University of Illinois at Chicago
(104705118) 
4:00 p.m.
New bounds in the Zarankiewicz problem.
Vladimir Nikiforov*, University of Memphis, Memphis, TN
(104705318) 
4:30 p.m.
Large induced trees in $K_r$free graphs.
Jacob Fox, Princeton University
PoShen Loh*, Princeton University
Benny Sudakov, UCLA
(10470596)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Geometric Function Theory and Analysis on Metric Spaces, III
Room 447, Altgeld Hall
Organizers:
Sergiy Merenkov, University of Illinois at UrbanaChampaign merenkov@uiuc.edu
Jeremy Taylor Tyson, University of Illinois at UrbanaChampaign tyson@math.uiuc.edu
JangMei Wu, University of Illinois at UrbanaChampaign wu@math.uiuc.edu

3:00 p.m.
On invertibility of Sobolev mappings.
Leonid V. Kovalev*, Syracuse University
Jani Onninen, Syracuse University
(10473090) 
3:30 p.m.
Some remarks on p harmonic measure.
John L Lewis*, University of Kentucky
(104735119) 
4:00 p.m.
A variant of Schwarz lemma for meromorphic functions and estimates for the hyperbolic metric.
Alexander Yu. Solynin*, Texas Tech University
(104730482) 
4:30 p.m.
Explicit Wild Reflections.
David H Hamilton*, UMCP
(104758138)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Mathematical Visualization, III
Room 102, Altgeld Hall
Organizers:
George K. Francis, University of Illinois at UrbanaChampaign gfrancis@uiuc.edu
Louis H. Kauffman, University of Illinois at Chicago kauffman@uic.edu
Dennis Martin Roseman, University of Iowa roseman@math.uiowa.edu
Andrew J. Hanson, Indiana University hanson@cs.indiana.edu

3:00 p.m.
Mathematical Modelling and Visualization with Mathematica.
Ulises CervantesPimentel*, Wolfram Research, Inc
(104751168) 
3:30 p.m.
Visualizing PseudoSpherical Cone Points.
Ivan C Sterling*, St Mary's College of Maryland
Josef Dorfmeister, Technical University Munich
Thomas Ivey, College of Charleston
(104753202) 
4:00 p.m.
Visualization for the Endless Universe.
Stewart P Dickson*, University of Illinois
Paul J Steinhardt, Department of Physics, Princeton University
(104751139) 
4:30 p.m.
Experiencing the Fourth Dimension.
Andrew J. Hanson*, Computer Science Department, School of Informatics, Indiana University, Bloomington, IN 47405
(104700116)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:50 p.m.
Special Session on Operator Algebras and Operator Spaces, III
Room 145, Altgeld Hall
Organizers:
ZhongJin Ruan, University of Illinois at UrbanaChampaign ruan@math.uiuc.edu
Florin P. Boca, University of Illinois at UrbanaChampaign fboca@math.uiuc.edu
Marius Junge, University of Illinois at UrbanaChampaign junge@math.uiuc.edu

3:00 p.m.
Group representations and $R$boundedness.
Christian Le Merdy*, University of Besancon, France
(104747258) 
3:30 p.m.
Transference of multipliers.
Eric Ricard*, Université de FrancheComté
(104746290) 
4:00 p.m.
LittlewoodPaley inequalities for operatorvalued functions.
Tao Mei*, Univ. of Illinois at UrbanaChampaign
Javier Parcet, Instituto de Ciencias Matemáticas, Spain
(104746423) 
4:30 p.m.
An operator space with "few" subspaces (joint work with C.Rosendal).
Timur Oikhberg*, University of California  Irvine and UIUC
Christian Rosendal, University of Illinois  Chicago
(104746393)

3:00 p.m.

Saturday March 28, 2009, 3:00 p.m.4:55 p.m.
Special Session on Holomorphic and CR Mappings, III
Room 343, Altgeld Hall
Organizers:
John P. D'Angelo, University of Illinois at UrbanaChampaign jpda@math.uiuc.edu
Jiri Lebl, University of Illinois at UrbanaChampaign jlebl@math.uiuc.edu
Alex Tumanov, University of Illinois at UrbanaChampaign tumanov@math.uiuc.edu

3:00 p.m.
Compactness and $\mathcal{L}^{2}_{loc}$hypoellipticity for $\overline{\partial}$.
Emil J. Straube*, Department of Mathematics, Texas A&M University
(104732166) 
3:30 p.m.
An $L^2$ extension problem for affine algebraic varieties.
Dror Varolin*, Stony Brook University
(104732487) 
4:00 p.m.
Compactness of the Complex Green Operator on CR Manifolds of Hypersurface Type.
Andrew Raich*, University of Arkansas
(10473279) 
4:30 p.m.
Rigidity results in CR geometry.
Peter Ebenfelt*, UCSD
Salah Baouendi, UCSD
Xiaojun Huang, Rutgers
Dmitry Zaitsev, Trinity College, Dublin
(104732490)

3:00 p.m.

Saturday March 28, 2009, 5:10 p.m.6:00 p.m.
Erdős Memorial Lecture
From Apollonian circle packings to Fibonacci Numbers.
Room 314, Altgeld Hall
Jeffrey C. Lagarias*, University of Michigan
(10471104) 
Saturday March 28, 2009, 6:15 p.m.8:00 p.m.
Reception hosted by the UIUC Department of Mathematics
South Lounge, Illini Union
Sunday March 29, 2009

Sunday March 29, 2009, 8:00 a.m.10:50 a.m.
Special Session on Algebra, Geometry and Combinatorics, III
Room 217, Noyes Lab
Organizers:
Rinat Kedem, University of Illinois at UrbanaChampaign rinat@uiuc.edu
Alexander T. Yong, University of Illinois at UrbanaChampaign ayong@uiuc.edu

8:00 a.m.
Fusion rings over finite fields.
Terry Gannon*, Math Dept, U of Alberta
(104713475) 
8:30 a.m.
Representations of double affine Lie algebras and finite groups.
Nicolas Guay*, University of Alberta
(10471763) 
9:00 a.m.
Total positivity in loop groups I: whirls and curls.
Pavlo Pylyavskyy*, University of Michigan
Thomas Lam, Harvard
(104705313) 
9:30 a.m.
The shifted plactic monoid.
Luis G Serrano*, University of Michigan
(10470597) 
10:00 a.m.
Bruhat order, smooth Schubert varieties, and hyperplane arrangements.
SuHo Oh*, Massachusetts Institute of Technology
Alexander Postnikov, Massachusetts Institute of Technology
Hwanchul Yoo, Massachusetts Institute of Technology
(104705407) 
10:30 a.m.
Presenting the cohomology of a Schubert variety.
Victor Reiner, University of Minnesota  Twin Cities
Alexander Woo*, Saint Olaf College
Alexander Yong, University of Illinois  UrbanaChampaign
(104705280)

8:00 a.m.

Sunday March 29, 2009, 8:00 a.m.12:30 p.m.
Special Session on Nonlinear Partial Differential Equations and Applications, III
room 241, Altgeld Hall
Organizers:
Igor Kukavica, University of Southern California kukavica@usc.edu
Anna L. Mazzucato, Pennsylvania State University mazzucat@math.psu.edu

8:00 a.m.
Stability of Periodic Traveling Wave Solutions of the Generalized Kortewegde Vries Equation.
Mathew A. Johnson*, University of Illinois at UrbanaChampaign
Jared C. Bronski, University of Illinois at Urbana Champaign
(104735269) 
8:30 a.m.
$C^*$algebra approach to spectral problems arising in hydrodynamics.
Roman Shvydkoy*, University of Illinois at Chicago
(104776488) 
9:00 a.m.
Behavior of solutions to the NavierStokes equations in the scaling invariant spaces.
Jean Bourgain, Institute for Advanced Study
Pierre Germain, Courant Institute of Mathematical Sciences
Natasa Pavlovic*, University of Texas at Austin
Gigliola Staffilani, Massachusetts Institute of Technology
(104735132) 
9:30 a.m.
Defect Eigenvalues and Diophantine Approximation.
Jared C Bronski*, University of Illinois
Zoi Rapti, University of Illinois
(104781447) 
10:00 a.m.
On a relation between Lyapunov exponents and the radius of analyticity.
A Cheskidov, University of Illinois, Chicago
M S Jolly*, Indiana University
E S Van Vleck, University of Kansas
(104735413) 
10:30 a.m.
Traveling fronts in disordered media.
Andrej Zlatos*, University of Chicago
(104735336) 
11:00 a.m.
New WellPosedness Results for the Equations of Stochastic Fluid Dynamics with Multiplicative Noise.
Nathan E. GlattHoltz*, Indiana University
(104735443) 
11:30 a.m.
The zero mode for the Primitive Equations.
Qingshan Chen*, Indiana University Bloomington
MingCheng Shiue, Indiana University Bloomington
Roger Temam, Indiana University Bloomington
(104735485) 
12:00 p.m.
Discussion

8:00 a.m.

Sunday March 29, 2009, 8:30 a.m.12:50 p.m.
Special Session on Geometric Function Theory and Analysis on Metric Spaces, IV
Room 447, Altgeld Hall
Organizers:
Sergiy Merenkov, University of Illinois at UrbanaChampaign merenkov@uiuc.edu
Jeremy Taylor Tyson, University of Illinois at UrbanaChampaign tyson@math.uiuc.edu
JangMei Wu, University of Illinois at UrbanaChampaign wu@math.uiuc.edu

8:30 a.m.
Astala's conjecture on Hausdorff measure distortion under planar quasiconformal mappings.
Michael T. Lacey, Georgia Institute of Technology
Eric T. Sawyer, McMaster University
Ignacio UriarteTuero*, Michigan State University ; Centre de Recerca Matemàtica (Barcelona, Spain)
(104730249) 
9:00 a.m.
Circlelike homeomorphisms and homogeneity at a point.
Melkana A Brakalova*, Fordham University
(104730297) 
9:30 a.m.
Rigidity of Derivations on the Plane and Applications.
Jasun Gong*, University of Pittsburgh
(104728411) 
10:00 a.m.
Comparison of BV Norms in Weighted Euclidean Spaces.
Chris Camfield*, Kenyon College
(104728425) 
10:30 a.m.
Break 
11:00 a.m.
Towards Uniform Rectifiability in a metric space setting.
Raanan Schul*, UCLA
(104728240) 
11:30 a.m.
On the dimension of measures.
Anna Vershynina*, University of California Davis
Qinglan Xia, University of California Davis
(10472875) 
12:00 p.m.
pHarmonic measure in simply connected domains.
John Lewis, Department of Mathematics, University of Kentucky
Kaj Nyström, Department of Mathematics, Umea University
Pietro PoggiCorradini*, Department of Mathematics, Kansas State University
(10473568) 
12:30 p.m.
An Asymptotic Mean Value Characterization for pharmonic functions.
Juan J Manfredi*, University of Pittsburgh
Mikko Parviainen, Helsinki University of Technology
Julio D Rossi, University of Buenos Aires/ Universidad Autonoma de Madrid
(104735136)

8:30 a.m.

Sunday March 29, 2009, 9:00 a.m.11:20 a.m.
Special Session on Complex Dynamics and Value Distribution, III
Room 441, Altgeld Hall
Organizers:
Aimo Hinkkanen, University of Illinois at UrbanaChampaign aimo@uiuc.edu
Joseph B. Miles, University of Illinois at UrbanaChampaign joe@math.uiuc.edu

9:00 a.m.
Univalence Criteria, Quasiconformal Mappings and Approximable Quasidisks.
NginTee Koh*, University of Illinois at UrbanaChampaign
(104730144) 
9:30 a.m.
Pinching Deformations of Rational Maps.
Robert W O'Connell*, Indiana UniversityBloomington
(10473726) 
10:00 a.m.
Julia (Limit) Sets in Curves.
David H Hamilton*, UMCP
(104730137) 
10:30 a.m.
Asymptotic distribution of eigenvalues of nonselfadjoint Schrödinger operators with polynomial potentials.
Kwang C. Shin*, University of West Georgia
(10474138) 
11:00 a.m.
Entire functions of the class $\mathcal{S}$ of irregular growth.
David Drasin*, Department of Mathematics, Purdue University, West Lafayette, IN 479072067
(104730326)

9:00 a.m.

Sunday March 29, 2009, 9:00 a.m.11:45 a.m.
Special Session on Topological Field Theories, Representation Theory, and Algebraic Geometry, IV
Room 347, Altgeld Hall
Organizers:
Thomas Nevins, University of Illinois at UrbanaChampaign nevins@uiuc.edu
David BenZvi, University of Texas at Austin benzvi@math.utexas.edu

9:00 a.m.
Localization for singular weights and finite Walgebras.
Kobi Kremnizer*, University of Chicago
(104722303) 
10:00 a.m.
The 2Lien of a 2Gerbe.
Prabhu Venkataraman*, Eureka College
(104714254) 
11:00 a.m.
Twisted Umkehr maps.
Matthew Ando*, University of Illinois at UrbanaChampaign
Andrew Blumberg, Stanford University
David Gepner, University of Illinois at Chicago
Hisham Sati, Yale University
(104755175)

9:00 a.m.

Sunday March 29, 2009, 9:00 a.m.12:20 p.m.
Special Session on Local and Homological Methods in Commutative Algebra, IV
Room 165, Noyes Lab
Organizers:
Florian Enescu, Georgia State University fenescu@gsu.edu
Sandra Spiroff, University of Mississippi spiroff@olemiss.edu

9:00 a.m.
A numerical criterion for tight closure of arbitrary ideals.
Neil Epstein*, University of Michigan
Yongwei Yao, Georgia State University
(104713442) 
9:30 a.m.
On the discreteness and rationality of $F$jumping coefficients.
Mordechai Katzman, University of Sheffield, UK
Gennady Lyubeznik*, University of Minnesota, USA
Wenliang Zhang, University of Michigan, USA
(104713193) 
10:00 a.m.
Discreteness and rationality of Fthresholds on rings with singularities.
Karl E. Schwede*, University of Michigan
Wenliang Zhang, University of Michigan
(104713161) 
10:30 a.m.
Some observations on rigidity of Frobenius endomorphism.
Jinjia Li*, Middle Tennessee State University
(104713380) 
11:00 a.m.
Socle degrees, Resolutions, and Frobenius powers.
Andrew R. Kustin*, University of South Carolina
(104713171) 
11:30 a.m.
Concerning limit HilbertKunz multiplicities.
Holger Brenner, University of Osnabrueck
Jinjia Li, Middle Tennessee State University
Claudia Miller*, Syracuse University
(104714325) 
12:00 p.m.
Uniform test exponents for rings of finite Frepresentation type.
Yongwei Yao*, Georgia State University
(104713135)

9:00 a.m.

Sunday March 29, 2009, 9:00 a.m.12:20 p.m.
Special Session on Differential Geometry and Its Applications, IV
Room 341, Altgeld Hall
Organizers:
Stephanie B. Alexander, University of Illinois at UrbanaChampaign stephanieb.alexander@gmail.com
Jianguo Cao, University of Notre Dame cao.7@nd.edu

9:00 a.m.
Compactness for manifolds with bounded volume and diameter.
Stefan Wenger*, University of Illinois at Chicago
(104753327) 
9:30 a.m.
A new proof to Perelman's collapsing theorem for geometrization of 3manifolds.
J. Cao, University of Notre Dame
Jian Ge*, University of Notre Dame
(104753128) 
10:00 a.m.
Positive curvature and eigenfunctions of the Laplacian.
Harold Gerard Donnelly*, Purdue University
(10475851) 
10:30 a.m.
On nonnegatively curved lowdimensional fixed point homogeneous Riemannian manifolds.
Fernando GalazGarcia*, University of Maryland, College Park
(104753120) 
11:00 a.m.
Yau's Conjecture on holomorphic functions of polynomial growth.
BingLong Chen, Zhongshan University, Guangzhou, P.R.C
XiaoYong Fu*, Zhongshan University, Guangzhou, P.R.C
Le Yin, Zhongshan University, Guangzhou, P.R.C
XiPing Zhu, Zhongshan University, Guangzhou, P.R.C
(104753186) 
11:30 a.m.
Liouvilletype Theorem in Alexandrov Spaces.
Bobo Hua*, Fudan University, China
(104758305) 
12:00 p.m.
Projectively Flat Metrics.
Zhongmin Shen*, Indiana UniversityPurdue University at Indianapolis
(104753200)

9:00 a.m.

Sunday March 29, 2009, 9:00 a.m.11:20 a.m.
Special Session on qSeries and Partitions, IV
Room 147, Altgeld Hall
Organizers:
Bruce Berndt, University of Illinois at UrbanaChampaign berndt@math.uiuc.edu
Ae Ja Yee, Pennsylvania State University yee@math.psu.edu

9:00 a.m.
Branching rules and qseries.
S. Ole Warnaar*, The University of Queensland, Australia
(104733340) 
9:30 a.m.
The negative qbinomial.
V. Reiner, School of Mathematics, University of Minnesota
D. Stanton*, School of Mathematics, University of Minnesota
(104705376) 
10:00 a.m.
The error term in Rademacher's formula for the partition function.
Amanda Folsom*, University of Wisconsin, Madison
Riad Masri, University of Wisconsin, Madison
(10471188) 
10:30 a.m.
Bijective proofs for some partition identities involving parity.
Sun Kim*, University of Illinois at UrbanaChampaign
(104705493) 
11:00 a.m.
1 mod $k $ lecture hall partition.
Jaebum Sohn*, Yonsei University
Pyo Lim, Seoul
(104711362)

9:00 a.m.

Sunday March 29, 2009, 9:00 a.m.12:20 p.m.
Special Session on The Logic and Combinatorics of Algebraic Structures, IV
Room 203, Noyes Lab
Organizers:
John Snow, Concordia University john.snow@cune.edu
Jeremy Alm, Illinois College alm.academic@gmail.com

9:00 a.m.
A StoneType Duality for Meet Semilattices.
Aditya K Nagrath*, University of Denver
(10470645) 
9:30 a.m.
Observations about perfect lattices.
Kira V Adaricheva*, Stern College for Women, Yeshiva University, New York
(104706306) 
10:00 a.m.
Lattices of theories in languages without equality.
J. B. Nation*, University of Hawaii
Tristan Holmes, University of Hawaii
Dayna Kitsuwa, University of Hawaii
Sheri Tamagawa, Roosevelt High School
(104706268) 
10:30 a.m.
Interpolation and Amalgamation for Ordered Algebraic Structures.
George Metcalfe*, Vanderbilt University
(10470641) 
11:00 a.m.
Subgroups of free idempotentgenerated semigroups.
John C. Meakin*, University of NebraskaLincoln
(104720189) 
11:30 a.m.
Comparing the complexity of hyperequivalent operations.
Jonathan D.H. Smith*, Department of Mathematics, Iowa State University
(104708146) 
12:00 p.m.
Constrained Eden: Algebras in parallel.
Steve Seif*, Mathematics Department, University of Louisville, Louisville, Kentucky 40292
(104708174)

9:00 a.m.

Sunday March 29, 2009, 9:00 a.m.11:50 a.m.
Special Session on Geometric Group Theory, IV
Room 445, Altgeld Hall
Organizers:
Sergei V. Ivanov, University of Illinois at UrbanaChampaign ivanov@math.uiuc.edu
Ilya Kapovich, University of Illinois at UrbanaChampaign kapovich@math.uiuc.edu
Igor Mineyev, University of Illinois at UrbanaChampaign mineyev@math.uiuc.edu
Paul E. Schupp, University of Illinois at UrbanaChampaign schupp@math.uiuc.edu

9:00 a.m.
Geometry of groups, random walks, and polynomial maps over finite fields.
Mark Sapir*, Vanderbilt University
(104720238) 
10:00 a.m.
Krull dimension for limit groups.
Larsen E Louder*, University of Michigan
(104720392) 
10:30 a.m.
Frobenius Problem and dead ends in integers.
Zoran Sunic*, Texas A&M University
(104720429) 
11:00 a.m.
Tame combings for groups.
Sean Cleary, The City College of New York
Susan Hermiller*, University of Nebraska
Melanie Stein, Trinity College
Jennifer Taback, Bowdoin College
(104720252) 
11:30 a.m.
Some quotients of Coxeter groups.
Tadeusz Januszkiewicz*, Ohio State University
(104720262)

9:00 a.m.

Sunday March 29, 2009, 9:00 a.m.12:20 p.m.
Special Session on Graph Theory, IV
Room 161, Noyes Lab
Organizers:
Alexander V. Kostochka, University of Illinois at UrbanaChampaign kostochk@math.uiuc.edu
Douglas B. West, University of Illinois at UrbanaChampaign west@math.uiuc.edu

9:00 a.m.
Cycle covers  minimal contra pairs, Petersen chain and Hamilton weights.
CunQuan Zhang*, West Virginia University
(104705190) 
9:30 a.m.
Cyclable sets of vertices in 3connected graphs.
Hao Li*, CNRS and Universite Parissud 11, France
Yan Zhu, Universite Parissud 11 and Shandong University
(104705281) 
10:00 a.m.
On $s$hamiltonian connected line graphs.
HongJian Lai*, West Virginia University
Yanting Liang, West Virginia University
Yehong Shao, Ohio University Southern
(104705213) 
10:30 a.m.
On Even Square of Hamilton Cycles.
Guantao Chen*, Georgia State University
Katsuhiro Ota, Keio University
Akita Saito, Nihon University
Yi Zhao, Gorgia State University
(104705141) 
11:00 a.m.
Symmetries of $(3,6)$fullerenes.
Mark Ellingham*, Vanderbilt University
Xiaoya Zha, Middle Tennessee State University
(104705320) 
11:30 a.m.
On the Chudnovsky, Seymour, and Sullivan's conjecture.
Molly Dunkum, Department of Mathematics and Computer Science, Western Kentucky University
Peter Hamburger*, Department of Mathematics and Computer Science, Western Kentucky University
Attila P{ó}r, Department of Mathematics and Computer Science, Western Kentucky University
(104705129) 
12:00 p.m.
Packing and covering tetrahedra.
Penny Haxell*, University of Waterloo
Subir Ghosh, Tata Institute of Fundamental Research
(104705354)

9:00 a.m.

Sunday March 29, 2009, 9:00 a.m.12:20 p.m.
Special Session on Probabilistic and Extremal Combinatorics, IV
Room 163, Noyes Lab
Organizers:
Jozsef Balogh, University of Illinois at UrbanaChampaign jobal@math.uiuc.edu
Zoltan Furedi, University of Illinois at UrbanaChampaign zfuredi@math.uiuc.edu

9:00 a.m.
On a Variant of van der Waerden's Theorem.
Sujith Vijay*, University of Illinois at UrbanaChampaign
(104705365) 
9:30 a.m.
Combinatorial problems from and for Horn formulas.
Marina Langlois, Univ. of Illinois at Chicago, Dept. Comp. Sci.
Dhruv Mubayi, Univ. of Illinois at Chicago, Dept. Math., Stat. and Comp.Sci.
Robert H. Sloan, Univ. of Illinois at Chicago, Dept. Comp. Sci.
Gyorgy Turan*, Univ. of Illinois at Chicago, Dept. Math., Stat. and Comp.Sci.
(104705278) 
10:00 a.m.
Turán type problems and polychromatic colorings on the hypercube.
David Offner*, Carnegie Mellon University
(104705366) 
10:30 a.m.
Graphs with four boundary vertices and the Frame of a graph.
Attila Por*, Western Kentucky University
Tobias Muller, School of Mathematical Sciences, Sackler Faculty of Exact Sciences, Tel Aviv University
JeanSebastian Sereni, CNRS (LIAFA, Universite Denis Diderot), Paris
(104705397) 
11:00 a.m.
On colorings avoiding both monochromatic and rainbow subgraphs.
Maria Axenovich*, Department of Mathematics, Iowa State University
JiHyeok Choi, Iowa State University
Perry Iverson, Iowa State University
(104705273) 
11:30 a.m.
Diameter of random spanning trees in a given graph.
Fan Chung, University of California, San Diego
Paul Horn, University of California, San Diego
Linyuan Lu*, University of South Carolina
(104705374) 
12:00 p.m.
Thuetype games and highly nonrepetitive sequences.
Wesley Pegden*, Department of Mathematics, Rutgers University (New Brunswick)
(10470539)

9:00 a.m.

Sunday March 29, 2009, 9:00 a.m.12:25 p.m.
Special Session on Holomorphic and CR Mappings, IV
Room 343, Altgeld Hall
Organizers:
John P. D'Angelo, University of Illinois at UrbanaChampaign jpda@math.uiuc.edu
Jiri Lebl, University of Illinois at UrbanaChampaign jlebl@math.uiuc.edu
Alex Tumanov, University of Illinois at UrbanaChampaign tumanov@math.uiuc.edu

9:00 a.m.
CR functions on subanalytic hypersurfaces.
Debraj Chakrabarti*, University of Notre Dame
Rasul Shafikov, University of Western Ontario
(10473292) 
9:30 a.m.
On the (non)extendability of germs of CR functions.
Anna Siano*, University of MIchigan
(104732472) 
10:00 a.m.
Discussion 
10:30 a.m.
Attracting Basins for Sequences of Uniformly Attracting Automorphisms.
Han Peters*, Stony Brook University.
(104732358) 
11:00 a.m.
Discussion 
11:30 a.m.
Discussion 
12:00 p.m.
Discussion

9:00 a.m.

Sunday March 29, 2009, 9:30 a.m.11:50 a.m.
Special Session on Topological Dynamics and Ergodic Theory, IV
Room 345, Altgeld Hall
Organizers:
Alica Miller, University of Louisville amiller@erdos.math.louisville.edu
Joseph Rosenblatt, University of Illinois at UrbanaChampaign rosnbltt@math.uiuc.edu

9:30 a.m.
The Eulerian adic dynamical system.
Karl Petersen*, University of North Carolina at Chapel Hill
Alexander Varchenko, University of North Carolina at Chapel Hill
(104737495) 
10:30 a.m.
Endomorphisms of Certain Dynamical Systems.
Jeanette Olli*, University of North Carolina at Chapel Hill
(104737184) 
11:00 a.m.
Directional recurrence for nonsingular actions of $\mathbb Z^d$.
Aimee S. A. Johnson, Swarthmore College
Daniel J Rudolph, Colorado State University
Ayse A. Sahin*, DePaul University
(104737372) 
11:30 a.m.
Generalized Gausstype interval maps.
Ilie Ugarcovici*, DePaul University
(104737388)

9:30 a.m.

Sunday March 29, 2009, 9:30 a.m.11:50 a.m.
Special Session on Operator Algebras and Operator Spaces, IV
Room 145, Altgeld Hall
Organizers:
ZhongJin Ruan, University of Illinois at UrbanaChampaign ruan@math.uiuc.edu
Florin P. Boca, University of Illinois at UrbanaChampaign fboca@math.uiuc.edu
Marius Junge, University of Illinois at UrbanaChampaign junge@math.uiuc.edu

9:30 a.m.
Positive Cocycles over Noncommutative 2Tori.
YiJun YAO*, Penn State University
(104746458) 
10:00 a.m.
Structures of certain homogeneous Hilbertian operator spaces and applications.
Quanhua Xu*, Universite de FrancheComte; France
(104746377) 
10:30 a.m.
Tilings, Modified Bellissard Algebra and $K$theory.
Semail Ulgen Yildirim*, Northwestern University
(10471969) 
11:00 a.m.
Every transcendental operator has a nontrivial invariant subspace.
YunSu Kim*, University of Toledo
(104747198) 
11:30 a.m.
Discussion

9:30 a.m.

Sunday March 29, 2009, 10:00 a.m.10:50 a.m.
Special Session on Number Theory in the Spirit of Erdos, IV
Room 143, Altgeld Hall
Organizers:
Kevin Ford, University of Illinois at UrbanaChampaign ford@math.uiuc.edu
A. J. Hildebrand, University of Illinois at UrbanaChampaign hildebr@math.uiuc.edu

10:00 a.m.
Dense sets of integers without long arithmetic progressions.
Kevin O'Bryant*, CUNY  Staten Island
(104711477) 
10:30 a.m.
Generalized multiplication tables.
Dimitris Koukoulopoulos*, University of Illinois at UrbanaChampaign
(104711455)

10:00 a.m.

Sunday March 29, 2009, 10:00 a.m.12:20 p.m.
Special Session on The Interface Between Number Theory and Dynamical Systems, IV
Room 245, Altgeld Hall
Organizers:
Florin Boca, University of Illinois at UrbanaChampaign fboca@math.uiuc.edu
Jeffrey Lagarias, University of Michigan lagarias@umich.edu
Kenneth Stolarsky, University of Illinois at UrbanaChampaign stolarsk@math.uiuc.edu

10:00 a.m.
The Weyl chamber flow, sections, and speculations about reduction theory (preliminary report).
Anatole Katok*, Penn State University
(104737446) 
11:00 a.m.
Apollonian Circle Packings and Horospherical Flows on Hyperbolic 3Manifolds.
Alex V Kontorovich*, Brown University
Hee Oh, Brown University
(10471161) 
11:30 a.m.
Quasiperiodic motion for the pentagram map.
Valentin Ovsienko, University Lyon 1
Richard Schwartz, Brown University
Sergei Tabachnikov*, Penn State
(104737204) 
12:00 p.m.
The distribution of the free path length of the linear flow in a honeycomb.
Florin P Boca*, University of Illinois UrbanaChampaign
(104711373)

10:00 a.m.

Sunday March 29, 2009, 10:00 a.m.12:20 p.m.
Special Session on Hyperbolic Geometry and Teichmuller Theory, IV
Room 443, Altgeld Hall
Organizers:
Jason Deblois, University of Illinois at Chicago jdelbois@math.uic.edu
Richard P. Kent, IV, Brown University rpkfour@gmail.com
Christopher J. Leininger, University of Illinois at UrbanaChampaign clein@math.uiuc.edu

10:00 a.m.
Asymptotics of pseudoAnosov dilatations.
ChiaYen Tsai*, University of Illinois at UrbanaChampaign
(104753160) 
10:30 a.m.
Margulis numbers and trace fields.
Peter B Shalen*, University of Illinois at Chicago
(104753294) 
11:00 a.m.
Rigid conics and Teichmueller discs.
Christopher Martin Judge*, Indiana University
S. Allen Broughton, RoseHulman Institute of Technology
(10475794) 
11:30 a.m.
Linear bound for the length of a conjugating element in the mapping class group.
Jing Tao*, University of Illinois at Chicago
(104751302) 
12:00 p.m.
A compactification for the space of singular Euclidean metrics on a surface.
Kasra Rafi*, University of Chicago
Moon Duchin, University of Michigan
Christopher Leininger, UIUC
(104751172)

10:00 a.m.

Sunday March 29, 2009, 10:00 a.m.10:55 a.m.
Special Session on Algebraic Methods in Statistics and Probability, IV
Room 204, Noyes Lab
Organizers:
Marlos A. G. Viana, University of Illinois at Chicago viana@uic.edu

10:00 a.m.
The Minimal Ideal of the Semigroup of Probability Measures on a Compact Semigroup with applications to Random Measures.
Gregory Budzban*, Southern Illinois University Carbondale
Goran Hognas, Abo Akademi
(10476074) 
10:30 a.m.
Combinatorial LocaltoGlobal PCA and an Application to Statistical Analysis of the Human Auditory Evoked Response.
Amir H Assadi*, University of Wisconsin  Madison
Hesam Torabi Dashti, Tehran University
Fatemeh Miri, Tehran University
(10476215)

10:00 a.m.

Sunday March 29, 2009, 12:00 p.m.12:20 p.m.
Special Session on Mathematical Visualization, IV
Room 102, Altgeld Hall
Organizers:
George K. Francis, University of Illinois at UrbanaChampaign gfrancis@uiuc.edu
Louis H. Kauffman, University of Illinois at Chicago kauffman@uic.edu
Dennis Martin Roseman, University of Iowa roseman@math.uiowa.edu
Andrew J. Hanson, Indiana University hanson@cs.indiana.edu

12:00 p.m.
Virtual Installations of Quasicrystalline Structures in 3space.
George Francis*, University of Illinois, UrbanaChampaign
Tony Robbin, Gilboa, New York
(10475184)

12:00 p.m.

Sunday March 29, 2009, 3:00 p.m.5:50 p.m.
Special Session on Algebra, Geometry and Combinatorics, IV
Room 217, Noyes Lab
Organizers:
Rinat Kedem, University of Illinois at UrbanaChampaign rinat@uiuc.edu
Alexander T. Yong, University of Illinois at UrbanaChampaign ayong@uiuc.edu

3:00 p.m.
The shape of a pure Osequence.
Mats Boij, Royal Institute of Technology
Juan C Migliore, University of Notre Dame
Rosa M MiróRoig, University of Barcelona
Uwe Nagel*, University of Kentucky
Fabrizio Zanello, Michigan Technological University
(104713476) 
3:30 p.m.
Monomial ideals with interesting properties.
Juan C. Migliore*, University of Notre Dame
Rosa MiroRoig, University of Barcelona
Uwe Nagel, University of Kentucky
(104713147) 
4:00 p.m.
On a minimal set of generators for the ideal of the diagonal locus of $(C^2)^n$.
Kyungyong Lee, Purdue University
Li Li*, University of Illinois at UrbanaChampaign
(104705375) 
4:30 p.m.
Koszul incidence algebras, affine semigroups, and StanleyReisner ideals.
Victor Reiner, University of Minnesota, Twin Cities
Dumitru I. Stamate*, Institute of Mathematics "Simion Stoilow" of the Romanian Academy
(10471698) 
5:00 p.m.
Stanley decompositions and squarefree monomial ideals.
YiHuang Shen*, Purdue University
(10470525) 
5:30 p.m.
On the Cohomology of a Simple Normal Crossings Divisor and its Dual Complex.
Parsa Bakhtary*, Purdue University
(104714398)

3:00 p.m.