AMS Sectional Meeting Program by Day
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2011 Spring Eastern Sectional Meeting
College of the Holy Cross, Worcester, MA
April 910, 2011 (Saturday  Sunday)
Meeting #1070
Associate secretaries:
Steven H Weintraub, AMS shw2@lehigh.edu
Saturday April 9, 2011

Saturday April 9, 2011, 7:30 a.m.4:00 p.m.
Exhibits and Book Sale
Rm 125, Haberlin Hall

Saturday April 9, 2011, 7:30 a.m.4:00 p.m.
Meeting Registration
Smith Labs Atrium, Smith Laboratories

Saturday April 9, 2011, 8:00 a.m.10:50 a.m.
Special Session on Complex Analysis and Banach Algebras, I
Rm 154, Smith Laboratories Organizers: John T. Anderson, College of the Holy Cross anderson@radius.holycross.edu Alexander J. Izzo, Bowling Green State University

Saturday April 9, 2011, 8:00 a.m.10:50 a.m.
Special Session on Dynamics of Rational Systems of Difference Equations with Applications, I
Rm 307, Stein Hall Organizers: M. R. S. Kulenovic, University of Rhode Island mkulenovic@mail.uri.edu O. Merino, University of Rhode Island

8:00 a.m.
Open Problems and Conjectures in Difference Equations.
Gerry Ladas*, Department of Mathematics, University of Rhode Island
(107039107)

8:30 a.m.
Using Difference Equations to Extend Our Knowledge of Nested Radicals.
Chris D. Lynd*, University of Rhode Island
(107039197)

9:00 a.m.
Patterns of Boundedness of Rational Systems in the Plane.
Emmanouil Drymonis*, Department of Mathematics, University of Rhode Island
(107039108)

9:30 a.m.
A bifurcation result for nonautonomous rational difference equations.
Frank J. Palladino*, University of Rhode Island
Michael A. Radin, Rochester Institute of Technology
(107039103)

10:00 a.m.
Unboundedness Results For Fourth Order Rational Difference Equations.
Gabriel Lugo*, University of Rhode Island
Frank Palladino, University of Rhode Island
(107039172)

10:30 a.m.
On The Piecewise Linear System $ x_{n+1} = \vert x_{n} \vert + ay_{n} + b \qquad , \qquad y_{n+1} = x_{n} + c\vert y_{n} \vert + d $.
Edward Grove, University of Rhode Island
Gerasimos Ladas, University of Rhode Island
Evelina G. Lapierre*, Johnson & Wales University
Wirot Tikjha, Mahidol University
(107039176)

Saturday April 9, 2011, 8:00 a.m.10:20 a.m.
Special Session on Geometry of Nilpotent Lie Groups, I
Rm 316, Stein Hall Organizers: Rachelle DeCoste, Wheaton College decoste_rachelle@wheatoncollege.edu Lisa DeMeyer, Central Michigan University Maura Mast, University of MassachusettsBoston

8:00 a.m.
Totally geodesic subalgebras in 2step nilpotent Lie algebras.
Rachelle C DeCoste*, Wheaton College
Lisa DeMeyer, Central Michigan University
(107053154)

8:30 a.m.
Characterizations of Heisenberglike Lie algebras.
Rachelle C DeCoste, Wheaton College, MA
Lisa DeMeyer*, Central Michigan University
Maura B Mast, University of Massachusetts Boston
(107053117)

9:00 a.m.
Automorphisms of 2step nilpotent Lie groups associated with graphs.
Meera G Mainkar*, Dartmouth College
(107053152)

9:30 a.m.
$\text{SO}(n) \backslash \text{SO}_0 (n,1)$ has positive curvatures.
Taechang Byun*, University of Oklahoma
Kyeonghee Jo, Mokpo National Maritime University, Korea
KyungBai Lee, University of Oklahoma
(10705329)

10:00 a.m.
Geometric Invariants for Nilmanifolds.
Tracy L Payne*, Idaho State University
(107053216)

Saturday April 9, 2011, 8:00 a.m.10:20 a.m.
Special Session on Mathematics and Climate, I
Rm 129, Stein Hall Organizers: Kenneth M. Golden, University of Utah Catherine Roberts, College of the Holy Cross croberts@holycross.edu MaryLou Zeeman, Bowdoin College

8:00 a.m.
A Mathematician's Guide to the 2007 IPCC Report on Climate Change.
Hans G Kaper*, Argonne National Laboratory and Georgetown University
(10708690)

8:30 a.m.
Dynamical Systems Approaches to Climate Prediction.
Christopher Danforth*, University of Vermont
Ross LiebLappen, University of Vermont
Nicholas Allgaier, University of Vermont
Kameron D Harris, University of Vermont
(10708625)

9:00 a.m.
Towards a theory for where rain falls over tropical continents.
William R. Boos*, Yale University
(10707632)

9:30 a.m.
Excitation of slow MJOlike Kelvin waves in the equatorial atmosphere by Yanai wavegroup via WISHEinduced convection.
aviv solodoch, weizmann institute, Rehovot, Israel
william r boos, yale university
zhiming kuang, harvard university
Eli Tziperman*, EPS/SEAS, Harvard University
(10708630)

10:00 a.m.
Patterns of Diversity in Marine Phytoplankton.
Andrew D Barton*, Massachusetts Institute of Technology
Stephanie Dutkiewicz, Massachusetts Institute of Technology
Glenn Flierl, Massachusetts Institute of Technology
Jason Bragg, CSIRO
Mick Follows, Massachusetts Institute of Technology
(10709223)

Saturday April 9, 2011, 8:00 a.m.10:50 a.m.
Special Session on Modular Forms, Elliptic Curves, Lfunctions, and Number Theory, I
Rm 223, Stein Hall Organizers: Sharon Frechette, College of the Holy Cross Keith Ouellette, College of the Holy Cross kouellet@mathcs.holycross.edu

8:00 a.m.
Newforms of cubic level.
Andrew Knightly*, University of Maine
Charles Li, The Chinese University of Hong Kong
(107011313)

8:30 a.m.
KacWakimoto characters, asymptotics, and mock modular forms.
Kathrin Bringmann, University of Cologne
Amanda Folsom*, Yale University
(107011116)

9:00 a.m.
Shifted Multiple Dirichlet Series and Applications.
Jeffrey Hoffstein*, Brown University
(107011335)

9:30 a.m.
On the Fourier inversion theorem for the full modular group.
Keith R Ouellette*, College of the Holy Cross
(107011316)

10:00 a.m.
On the rapid decay of cuspidal automorphic forms.
Wilfried Schmid*, Harvard University
(107011109)

10:30 a.m.
Partial sum of the Möbius function in function fields.
Byungchul Cha*, Muhlenberg College
(10701106)

Saturday April 9, 2011, 8:00 a.m.10:45 a.m.
Special Session on Topics in Partial Differential Equations and Geometric Analysis, I
Rm 219, Haberlin Hall Organizers: MariaCristina Caputo, University of Arkansas Natasa Sesum, Rutgers University natasas@math.rutgers.edu

Saturday April 9, 2011, 8:00 a.m.10:50 a.m.
Special Session on Topological, Geometric, and Quantum Invariants of 3manifolds, I
Rm 118, Beven Hall Organizers: David Damiano, College of the Holy Cross Scott Taylor, Colby College Helen Wong, Carleton College hwong@carleton.edu

8:00 a.m.
Exceptional Surgeries and Hidden Symmetries.
Neil R Hoffman*, University of Texas at Austin
(107057121)

8:30 a.m.
Some cubed hyperbolic 2 and 3 manifolds.
Genevieve S. Walsh*, Tufts University
(107057242)

9:00 a.m.
Slopes and colored Jones polynomials of adequate knots.
David Futer*, Temple University
Efstratia Kalfagianni, Michigan State University
Jessica S Purcell, Brigham Young University
(107057268)

9:30 a.m.
Small hyperbolic polyhedra.
Shawn Rafalski*, Fairfield University
(107057118)

10:00 a.m.
Volumes of Hyperbolic Orbifolds.
Ilesanmi Adeboye*, University of California, Santa Barbara
(107057331)

10:30 a.m.
On nonhyperbolic handle number one links.
Michael John Williams*, University of California, Riverside
Abigail Thompson, University of California, Davis
(107057340)

Saturday April 9, 2011, 8:30 a.m.10:50 a.m.
Special Session on Celestial Mechanics, I
Rm 359, Swords Hall Organizers: Glen R. Hall, Boston University Gareth E. Roberts, College of the Holy Cross groberts@radius.holycross.edu

Saturday April 9, 2011, 8:30 a.m.10:50 a.m.
Special Session on Combinatorial Representation Theory, I
Rm 101, ONeil Hall Organizers: Cristina Ballantine, College of the Holy Cross cballant@holycross.edu Rosa Orellana, Dartmouth College

8:30 a.m.
Skew quantum MurnaghanNakayama rule.
Matjaz Konvalinka*, University of Ljubljana, Department of Mathematics
(10700569)

9:00 a.m.
Tracking the JucysMurphy Specialization.
Jonathan Novak*, University of Waterloo
(107005106)

9:30 a.m.
Products of LittlewoodRichardson Fillings and Flows on Honeycombs.
Glenn D. Appleby*, Santa Clara University
Tamsen Whitehead, Santa Clara University
(10700528)

10:00 a.m.
ktriangulations, kfans of Dyck paths, and pipe dreams.
Luis G. Serrano*, LaCIM, Universite du Quebec a Montreal
Christian Stump, Lacim, Universite du Quebec a Montreal
(107005182)

10:30 a.m.
Path tableaux and combinatorial interpretations for $S_n$class functions.
Mark A Skandera*, Lehigh University
Brittany Shelton, Lehigh University
Sam Clearman, Lehigh University
(107005275)

Saturday April 9, 2011, 8:30 a.m.10:45 a.m.
Special Session on Combinatorics of Coxeter Groups, I
Rm 123, ONeil Hall Organizers: Dana C. Ernst, Plymouth State University dcernst@plymouth.edu Matthew Macauley, Clemson University

Saturday April 9, 2011, 8:30 a.m.10:50 a.m.
Special Session on History and Philosophy of Mathematics, I
Rm 112, ONeil Hall Organizers: James J. Tattersall, Providence College V. Frederick Rickey, United States Military Academy FredRickey@usma.edu

Saturday April 9, 2011, 8:30 a.m.10:50 a.m.
Special Session on Interactions between Dynamical Systems, Number Theory, and Combinatorics, I
Rm 321, Swords Hall Organizers: Vitaly Bergelson, The Ohio State University Dmitry Kleinbock, Brandeis University kleinboc@brandeis.edu

8:30 a.m.
On the Möbius function and Statistical Mechanics.
Francesco Cellarosi*, Princeton University
(107011214)

9:00 a.m.
Property $(\tau)$ for thin groups.
Alireza Salehi Golsefidy, Princeton University
Peter P. Varju*, Princeton University
(107020227)

9:30 a.m.
Affine sieve and expanders.
Alireza Salehi Golsefidy*, Princeton University
Peter Sarnak, Princeton University
Peter Varju, Princeton University
(10702099)

10:00 a.m.
Dirichlet's theorem, nonplanarity in the space of matrices, and homogeneous flows.
Dmitry Kleinbock*, Brandeis University
Gregory Margulis, Yale University
Junbo Wang, Brandeis University
(107011190)

10:30 a.m.
Effective Limit Distribution of the Frobenius Numbers.
Han Li*, Department of Mathematics, Yale University
(10703792)

Saturday April 9, 2011, 8:30 a.m.10:50 a.m.
Special Session on Physically Inspired Higher Homotopy Algebra, I
Rm 302, Swords Hall Organizers: Thomas J. Lada, North Carolina State University lada@math.ncsu.edu Jim Stasheff, University of North Carolina, Chapel Hill

8:30 a.m.
Formality theorem for Hochschild cochains via transfer.
Vasily A. Dolgushev*, Temple University
(10701834)

9:00 a.m.
Homotopy associative algebras induce homotopy BatalinVilkovisky algebras.
John Terilla, CUNY Queens College
Thomas Tradler, CUNY
Scott O Wilson*, CUNY Queens College
(10701839)

9:30 a.m.
$L_\infty$algebras and Symmetric Brace Algebras.
Mindy Capaldi, Valparaiso University
Thomas Lada*, North Carolina State University
(107018171)

10:00 a.m.
A Concrete $L_{\infty}$ Module and Its Induced $L_{\infty}$ Structure.
Michael P. Allocca*, University of Scranton
(10705561)

10:30 a.m.
Modules and Extensions of Infinity Algebras.
Michael R Penkava*, University of WisconsinEau Claire
Alice Fialowski, Eotvos Lorand University, Budapest
Joshua Frinak, University of WisconsinEau Claire
Austen Ott, University of WisconsinEau Claire
(107017222)

Saturday April 9, 2011, 8:30 a.m.10:50 a.m.
Special Session on Random Processes, I
Rm 314, Stein Hall Organizers: Andrew Ledoan, Boston College Steven J. Miller, Williams College Steven.J.Miller@williams.edu Mihai Stoiciu, Williams College

Saturday April 9, 2011, 8:30 a.m.10:40 a.m.
Session for Contributed Papers, I
Rm 125, Beven Hall

8:30 a.m.
Undergraduate Research based on R Through Excel.
Salil Kumar Das*, Prince Georges Community College
George Perkins, Prince Georges Community College
(107062338)

8:45 a.m.
On the representation problems of infinite series with Harmonic numbers.
H. Qin, Institute of Applied Mathematics, Shandong Univ. of Technology
Y Lu*, Bloomsburg University
(107000201)

9:00 a.m.
On Tetranomial Thue Equations.
Helen G. Grundman*, Bryn Mawr College
Daniel P. Wisniewski, DeSales University
(10701184)

9:15 a.m.
Meridians and the Carathéodory Topology.
Mark David Comerford*, University of Rhode Island
(107030259)

9:30 a.m.
On midempotent operators and the invariant subspace problem.
D. Drissi*, Kuwait University
(107047203)

9:45 a.m.
The stability and Hopf bifurcation for a predatorprey system with time delay.
Canan Celik Karaaslanli*, Bahcesehir University
(10703751)

10:00 a.m.
How an orbit with a single limit point induces a dense orbit.
Irina N Seceleanu*, Bridgewater State University
(107046306)

10:15 a.m.
Lower Rank Approximation: A Generalization of SchmidtMirsky Theorem and Algorithms.
Yang Liu*, Marlboro College
(10704944)

10:30 a.m.
Cognitive Level of Development and Mathematical Fluency of First Grade Children.
Zane Wubbena*, Texas State UniversitySan Marcos
(10709708)

Saturday April 9, 2011, 9:00 a.m.10:50 a.m.
Special Session on Computability Theory and Applications, I
Rm 298, Stein Hall Organizers: Brooke Andersen, Assumption College brandersen@assumption.edu

Saturday April 9, 2011, 9:00 a.m.10:50 a.m.
Special Session on Geometric and Topological Problems in Curvature, I
Rm 225, Haberlin Hall Organizers: Megan Kerr, Wellesley College Stanley Chang, Wellesley College schang@wellesley.edu

9:00 a.m.
Nontrivial Ricci solitons on 3D Sasakian manifolds and their obstruction to compactness.
Ramesh Sharma*, University Of New Haven
Amalendu Ghosh, Krishnagar Government College, India
(10705349)

9:30 a.m.
The projective or splitquaternionic models: Applications to Lorentzian hypersurfaces with certain curvature conditions.
Martha P. Dussan Angulo*, Universidade de Sao Paulo, Departamento de Matematica IME. Sao Paulo, S.P.
Martin Magid, Wellesley college
(107051210)

10:00 a.m.
Isometric circle actions on simplyconnected 4manifolds with nonnegative curvature.
Fernando GalazGarcia*, Mathematisches Institut, WWU Muenster
Martin Kerin, Mathematisches Institut, WWU Muenster
(107053250)

10:30 a.m.
Nonnegatively curved 5manifolds of almost maximal symmetry rank.
Catherine E Searle*, IMATEUNAM Cuernavaca
Fernando CalazGarcia, U. Muenster
(107053285)

Saturday April 9, 2011, 9:00 a.m.10:50 a.m.
Special Session on New Trends in College and University Faculty Engagement in K12 Education, I
Rm 224, Stein Hall Organizers: Jennifer Beineke, Western New England College jbeineke@wnec.edu Corri Taylor, Wellesley College

9:00 a.m.
Improving the Mathematical Preparation of Elementary Teachers in Massachusetts.
Richard Bisk*, Worcester State University
(10709755)

9:30 a.m.
The Intel Math Initiative: Professional Development to Deepen the Content Knowledge of our Nation's K8 Teachers.
Catherine A Roberts*, College of the Holy Cross
(10709789)

10:00 a.m.
Bridges Between High School and College Mathematics.
Eileen F. Lee*, Math for AmericaBoston
(107097274)

10:30 a.m.
Foundational Mathematics Concepts for the High School to College Transition.
Danuta Bukatko, Department of Psychology, College of the Holy Cross
David B. Damiano*, Department of Mathematics and Computer Science, College of the Holy Cross
Rosario D. Esparza, College of the Holy Cross
Sharon Frechette, Department of Mathematics and Computer Science, College of the Holy Cross
Catherine Roberts, Department of Mathematics and Computer Science, College of the Holy Cross
(107097232)

Saturday April 9, 2011, 9:00 a.m.10:50 a.m.
Special Session on Number Theory, Arithmetic Topology, and Arithmetic Dynamics, I
Rm 328, Swords Hall Organizers: Michael Bush, Smith College mbush@smith.edu Farshid Hajir, University of Massachusetts, Amherst Rafe Jones, College of the Holy Cross

Saturday April 9, 2011, 9:00 a.m.10:50 a.m.
Special Session on The Algebraic Geometry and Topology of Hyperplane Arrangements, I
Rm 105, Beven Hall Organizers: Graham Denham, University of Western Ontario Alexander I. Suciu, Northeastern University a.suciu@neu.edu

Saturday April 9, 2011, 9:00 a.m.10:50 a.m.
Special Session on Undergraduate Research, I
Rm 155, Smith Laboratories Organizers: David Damiano, College of the Holy Cross Giuliana Davidoff, Mount Holyoke College Steve Levandosky, College of the Holy Cross Steven J. Miller, Williams College Steven.J.Miller@williams.edu

Saturday April 9, 2011, 9:30 a.m.10:50 a.m.
Special Session on Mathematical and Computational Advances in Interfacial Fluid Dynamics, I
Rm 216, Stein Hall Organizers: Burt S. Tilley, Worcester Polytechnic Institute tilley@wpi.edu Lou Kondic, New Jersey Institute of Technology

9:30 a.m.
Modeling spreading of nematic liquid crystal droplets.
TeSheng Lin, Department of Mathematics, New Jersey Institute of Technology
Linda Cummings, Department of Mathematics, New Jersey Institute of Technology
Lou Kondic*, Department of Mathematics, NJIT
(107076186)

10:00 a.m.
The mechanism of a splash.
Shreyas Mandre*, Brown University
(107000143)

10:30 a.m.
Highorder, optimallylocal schemes for the advection equation.
JeanChristophe Nave*, Dept. of Mathematics and Statistics, McGill University
Benjamin Seibold, Dept. of Mathematics, Temple University
Ruben Rosales, Dept. of Mathematics, MIT
(10706583)

Saturday April 9, 2011, 11:00 a.m.11:55 a.m.
Invited Address
Welcome and introductory remarks.
Ballroom, Hogan Center
Mathematics and the melting polar ice caps.
Ballroom, Hogan Center
Kenneth M. Golden*, Department of Mathematics, University of Utah
(10708602)

Saturday April 9, 2011, 1:00 p.m.2:00 p.m.
Reception for Student Presenters, Participants, and Their Advisors
Room 320, Hogan Center

Saturday April 9, 2011, 2:00 p.m.2:50 p.m.
Invited Address
Solitons in geometric evolution equations
Ballroom, Hogan Center
Natasa Sesum*, University of Pennsylvania
Panagiota Daskalopoulos, Columbia University
Ovidiu Munteanu, Columbia University
(10703504)

Saturday April 9, 2011, 3:00 p.m.5:20 p.m.
Special Session on Celestial Mechanics, II
Rm 359, Swords Hall Organizers: Glen R. Hall, Boston University Gareth E. Roberts, College of the Holy Cross groberts@radius.holycross.edu

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Combinatorial Representation Theory, II
Rm 101, ONeil Hall Organizers: Cristina Ballantine, College of the Holy Cross cballant@holycross.edu Rosa Orellana, Dartmouth College

3:00 p.m.
The degenerate affine BMW algebra and its center.
Zajj B Daugherty*, St. Olaf College
Arun Ram, University of Melbourne
Rahbar Virk, UC Davis
(107016265)

3:30 p.m.
Geometric approach to Littlewood inversion formulas.
Steven V Sam*, MIT
Jerzy Weyman, Northeastern University
(107020102)

4:00 p.m.
Wronskians and the Cyclic Sieving Phenomenon.
Kevin Purbhoo*, University of Waterloo
(107005228)

4:30 p.m.
Combinatorial commutative algebra meets an object from geometric representation theory.
Aba Mbirika*, Bowdoin College
(107005204)

5:00 p.m.
Normality and quadraticity for special ample line bundles on toric varieties arising from root systems.
Travis Schedler*, AIM/MIT
Qendrim R. Gashi, University of Prishtina
(107005114)

5:30 p.m.
Tableaux and plane partitions of truncated shapes.
Greta Panova*, Harvard
(107005219)

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Combinatorics of Coxeter Groups, II
Rm 123, ONeil Hall Organizers: Dana C. Ernst, Plymouth State University dcernst@plymouth.edu Matthew Macauley, Clemson University

3:00 p.m.
A uniform bijection between nonnesting and noncrossing partitions.
Drew Armstrong, University of Miami
Christian Stump*, LaCIM, Université du Québec, Montréal
Hugh Thomas, University of New Brunswick
(107005130)

3:30 p.m.
The enumeration of fully commutative affine permutations.
Christopher R H Hanusa*, Queens College of the City University of New York
Brant C Jones, James Madison University
(10700571)

4:00 p.m.
Abacus models for parabolic quotients of affine Weyl groups.
Christopher R. H. Hanusa, Queens College (CUNY)
Brant C. Jones*, James Madison University
(107005195)

4:30 p.m.
Homology representations arising from a hypersimplex.
Jacob Harper*, University of Colorado at Boulder
(107005144)

5:00 p.m.
Towards a cyclic version of Matsumoto's theorem.
Dana C. Ernst, Plymouth State University
Richard M. Green, University of Colorado
Matthew Macauley*, Clemson University
(107020211)

5:30 p.m.
The cyclically fully commutative elements in a Coxeter group.
ShihWei Chao*, Clemson University, SC
Matthew Macauley, Clemson University, SC
(107005244)

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Complex Analysis and Banach Algebras, II
Rm 154, Smith Laboratories Organizers: John T. Anderson, College of the Holy Cross anderson@radius.holycross.edu Alexander J. Izzo, Bowling Green State University

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Computability Theory and Applications, II
Rm 298, Stein Hall Organizers: Brooke Andersen, Assumption College brandersen@assumption.edu

3:00 p.m.
Characterizing computable analysis with differential equations.
Kerry Ojakian*, Saint Joseph's College (New York)
Manuel Campagnolo, Instituto Superior de Agronomia (Lisbon)
(107003115)

3:30 p.m.
Ramsey Properties of Partial Orderings and Arithmetic Comprehension.
Marcia J. Groszek*, Dartmouth College
(107003262)

4:00 p.m.
Stability and posets.
Carl Jockusch, Jr., University of Illinois
Bart Kastermans, University of Colorado
Steffen Lempp, University of Wisconsin
Manuel Lerman, University of Connecticut
Reed Solomon*, University of Connecticut
(107003312)

4:30 p.m.
Computable Categoricity and Relative Computable Categoricity.
Rodney G. Downey, Victoria University of Wellington
Asher M. Kach*, University of Connecticut  Storrs
Steffen Lempp, University of Wisconsin  Madison
Daniel Turetsky, Victoria University of Wellington
(107003253)

5:00 p.m.
Computability of integer parts.
Paola D'Aquino, Second University of Naples
Julia Knight, University of Notre Dame
Karen Lange*, University of Notre Dame
(107003179)

5:30 p.m.
Problem Solving

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Dynamics of Rational Systems of Difference Equations with Applications, II
Rm 307, Stein Hall Organizers: M. R. S. Kulenovic, University of Rhode Island mkulenovic@mail.uri.edu O. Merino, University of Rhode Island

3:00 p.m.
Linear Fractional Recurrences: Periodicities and Integrability.
Eric Bedford, Indiana University, Bloomington IN
Kyounghee Kim*, Florida State University, Tallahassee FL
(107037194)

3:30 p.m.
The period $p$ curve, ${\mathcal S}_p$ for Cubic Polynomials.
Araceli Bonifant*, University of Rhode Island
Jan Kiwi, Pontificia Universidad Catolica de Chile
John Milnor, Institute for Mathematical Sciences, Stony Brook University
(107037181)

4:00 p.m.
On a Nonlinear System of Difference Equations.
M Predescu*, Bentley University
(107039233)

4:30 p.m.
On The Global Character of the solutions of the system: $x_{n+1}=\frac{\alpha_{1}}{x_{n}+y_{n}} y_{n+1}=\frac{\alpha_{2} + y_{n}}{B_{2} x_{n}+y_{n}}$.
Michael A. Radin*, Rochester Institute of Technology
Edward Grove, University of Rhode Island
Kostrov Yevgeniy, Xavier University of Louisiana
Schultz Stephen, Providence College
(107039207)

5:00 p.m.
Epidemics on networks with just one equation.
Joel C Miller*, Harvard School of Public Health & National Instittutes of Health
Erik M Volz, University of Michigan
(107092342)

5:30 p.m.
Global Behavior of a Twodimensional Competitive System of Difference Equations with Stocking.
Mustafa R.S. Kulenovic*, University of Rhode Island, Kingston, RI 02881
Mehmed Nurkanovic, University of Tuzla, Tuzla, Bosnia and Herzegovina
(107039280)

Saturday April 9, 2011, 3:00 p.m.4:50 p.m.
Special Session on Geometric and Topological Problems in Curvature, II
Rm 225, Haberlin Hall Organizers: Megan Kerr, Wellesley College Stanley Chang, Wellesley College schang@wellesley.edu

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Geometry and Applications of 3Manifolds, I
Rm 125, Beven Hall Organizers: Abhijit Champanerkar, College of Staten Island, CUNY abhijit@math.csi.cuny.edu Ilya Kofman, College of Staten Island, CUNY Walter Neumann, Barnard College, Columbia University

3:00 p.m.
Exceptional Lines and Separating Sets at Singular Points of Complex Surfaces.
Lev Birbrair, Universidade Federal do Ceara, FortalesaCe, Brasil
Walter Neumann, Barnard College, Columbia University
Donal O'Shea*, Mount Holyoke College
(107014297)

3:30 p.m.
On the topology of non isolated singularities of complex surfaces.
Anne Pichon*, AixMarseille University
(107032224)

4:00 p.m.
What do perverse sheaves tell you about the topology of analytic spaces?
David B. Massey*, Northeastern University
(10703298)

4:30 p.m.
On the minimal degree of a transverse $\mathbf{C}$link, with an application to topological slice genus of classical knots.
Lee Rudolph*, Department of Mathematics and Computer Science, Clark University, Worcester MA
(10705773)

5:00 p.m.
CassonLin type invariants for links.
Eric Harper*, Universite du Quebec a Montreal
Nikolai Saveliev, University of Miami
(107057139)

5:30 p.m.
Width is Not Additive.
Ryan C Blair*, University of Pennsylvania
Maggy Tomova, University of Iowa
(107057317)

Saturday April 9, 2011, 3:00 p.m.5:20 p.m.
Special Session on Geometry of Nilpotent Lie Groups, II
Rm 316, Stein Hall Organizers: Rachelle DeCoste, Wheaton College decoste_rachelle@wheatoncollege.edu Lisa DeMeyer, Central Michigan University Maura Mast, University of MassachusettsBoston

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on History and Philosophy of Mathematics, II
Rm 112, ONeil Hall Organizers: James J. Tattersall, Providence College V. Frederick Rickey, United States Military Academy FredRickey@usma.edu

3:00 p.m.
Mathematics and Magic in MeTuran.
Duncan J Melville*, St. Lawrence University
(107001221)

3:30 p.m.
What's in a Name? Eponyms, Mathematicians, Objects and Museum Collections, from Galileo's Finger to the Bernoulli Box.
Peggy Aldrich Kidwell*, National Museum of American History, Smithsonian Institution
(107001119)

4:00 p.m.
The Evolution of Mathematics Teaching Practices, c. 17701970.
Amy K AckerbergHastings*, University of Maryland University Collelge
(10700181)

4:30 p.m.
Simon Newcomb as a Nineteenth Century Mathematics Educator.
David Lindsay Roberts*, Prince George's Community College
(107001125)

5:00 p.m.
Martin Gardner's 19th Century Counterpart: Richard A. Proctor.
Francine F. Abeles*, Kean University, Union, NJ 07083
(10700176)

5:30 p.m.
Calculus Books and Curriculum at West Point in the Twentieth Century.
Tina R Hartley*, United States Military Academy, West Point, NY
V Frederick Rickey, United States Military Academy
(107001147)

Saturday April 9, 2011, 3:00 p.m.5:45 p.m.
Special Session on Interactions between Dynamical Systems, Number Theory, and Combinatorics, II
Rm 321, Swords Hall Organizers: Vitaly Bergelson, The Ohio State University Dmitry Kleinbock, Brandeis University kleinboc@brandeis.edu

Saturday April 9, 2011, 3:00 p.m.4:50 p.m.
Special Session on Mathematical and Computational Advances in Interfacial Fluid Dynamics, II
Rm 216, Stein Hall Organizers: Burt S. Tilley, Worcester Polytechnic Institute tilley@wpi.edu Lou Kondic, New Jersey Institute of Technology

Saturday April 9, 2011, 3:00 p.m.4:50 p.m.
Special Session on Mathematics and Climate, II
Rm 129, Stein Hall Organizers: Kenneth M. Golden, University of Utah Catherine Roberts, College of the Holy Cross croberts@holycross.edu MaryLou Zeeman, Bowdoin College

3:00 p.m.
Observing and Characterizing Submesoscale Dynamics in the Upper Arctic Ocean.
MaryLouise E Timmermans*, Department of Geology and Geophysics, Yale University
(10700037)

3:30 p.m.
An IceAlbedo Feedback Model of Paleoclimate.
Richard P. McGehee*, University of Minnesota
(10703727)

4:00 p.m.
Using a Simple Mathematical Model to Understand Arctic Sea Ice Behavior in a Future Warmer Climate.
Dorian S Abbot*, University of Chicago
Mary Silber, Northwestern University
Raymond T Pierrehumbert, University of Chicago
(10703415)

4:30 p.m.
The role of supraglacial lakes in supplying meltwater to the base of the Greenland Ice Sheet.
Mark D Behn*, Woods Hole Oceanographic Institution
Michael J Krawczynski, MIT/WHOI Joint Program
Sarah B Das, Woods Hole Oceanographic Institution
Ian Joughin, APL, University of Washington
(10707426)

Saturday April 9, 2011, 3:00 p.m.5:20 p.m.
Special Session on Modular Forms, Elliptic Curves, Lfunctions, and Number Theory, II
Rm 223, Stein Hall Organizers: Sharon Frechette, College of the Holy Cross Keith Ouellette, College of the Holy Cross kouellet@mathcs.holycross.edu

Saturday April 9, 2011, 3:00 p.m.4:50 p.m.
Special Session on New Trends in College and University Faculty Engagement in K12 Education, II
Rm 224, Stein Hall Organizers: Jennifer Beineke, Western New England College jbeineke@wnec.edu Corri Taylor, Wellesley College

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Number Theory, Arithmetic Topology, and Arithmetic Dynamics, II
Rm 328, Swords Hall Organizers: Michael Bush, Smith College mbush@smith.edu Farshid Hajir, University of Massachusetts, Amherst Rafe Jones, College of the Holy Cross

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Physically Inspired Higher Homotopy Algebra, II
Rm 302, Swords Hall Organizers: Thomas J. Lada, North Carolina State University lada@math.ncsu.edu Jim Stasheff, University of North Carolina, Chapel Hill

3:00 p.m.
$L_{\infty}$algebras from higher symplectic geometry.
Christopher L. Rogers*, University of California, Riverside
(107053272)

3:30 p.m.
Equivariant holonomy of gerbes and higher Hochschild complexes.
Mahmoud Zeinalian*, Long Island University
Thomas Tradler, CUNY and Max Planck Institute for Mathematics
Scott Wilson, Queens College of CUNY
Gregory Ginot, Université de Paris 6
(10705582)

4:00 p.m.
Higher supergroups for string and Mtheory.
John Huerta*, University of California, Riverside
(107018307)

4:30 p.m.
Transversal string topology and invariants of manifolds.
Somnath Basu*, Stony Brook University
(107055337)

5:00 p.m.
Linfinity models of mapping spaces.
Urtzi Buijs*, Universitat de Barcelona
(107055169)

5:30 p.m.
Tensor products of $A_{\infty}$algebras with higher homotopy inner products.
Thomas Tradler, College of Technology, City University of New York
Ronald Umble*, Millersville University of Pennsylvania
(10705558)

Saturday April 9, 2011, 3:00 p.m.5:55 p.m.
Special Session on Random Processes, II
Rm 314, Stein Hall Organizers: Andrew Ledoan, Boston College Steven J. Miller, Williams College Steven.J.Miller@williams.edu Mihai Stoiciu, Williams College

3:00 p.m.
Extreme spacings for eigenvalues of random matrices.
Paul Bourgade*, Harvard University
(10706065)

3:30 p.m.
Distributions of Eigenvalues of Real Symmetric mCirculant Matrices.
Murat Kologlu*, Williams College
Steven J Miller, Williams College
Gene Kopp, University of Chicago
(107060167)

4:00 p.m.
Meixner matrix ensembles.
Wlodek Bryc*, University of Cincinnati
Gerard Letac, Université Paul Sabatier, Toulouse, France
(10706050)

4:30 p.m.
Random Matrices with Poisson Eigenvalue Statistics.
Mihai Stoiciu*, Williams College
(107060209)

5:00 p.m.
Finite rank perturbations of large random matrices.
Alex Bloemendal*, University of Toronto
(107060123)

5:30 p.m.
Painleve VI and TracyWidom Distributions in Random Graphs, Random Matrix Theory and Number Theory.
Steven J Miller*, Williams College
(107015178)

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on The Algebraic Geometry and Topology of Hyperplane Arrangements, II
Rm 105, Beven Hall Organizers: Graham Denham, University of Western Ontario Alexander I. Suciu, Northeastern University a.suciu@neu.edu

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Topics in Partial Differential Equations and Geometric Analysis, II
Rm 219, Haberlin Hall Organizers: MariaCristina Caputo, University of Arkansas Natasa Sesum, Rutgers University natasas@math.rutgers.edu

3:00 p.m.
On linear stability of compact Ricci solitons.
Meng Zhu*, Lehigh University
(107053161)

3:30 p.m.
Modified Mean Curvature Flow of Starshaped Hypersurfaces in Hyperbolic Space.
Longzhi Lin*, Department of Mathematics, Johns Hopkins University
Ling Xiao, Department of Mathematics, Johns Hopkins University
(107035180)

4:00 p.m.
AleksandrovBakelmanPucci Estimates For IntegroDifferential Equations.
Nestor Guillen*, University of Texas at Austin
Russell Schwab, Carnegie Mellon University
(107035151)

4:30 p.m.
Complete Kahler Ricciflat metrics on resolutions of singularities.
Bianca Santoro*, CUNYCity College
(107051135)

5:00 p.m.
Smooth singularity models for the Lagrangian mean curvature flow.
Andrew A Cooper*, Michigan State University
(107053138)

5:30 p.m.
Heat equation under the Ricci flow  old and new.
Mihai Bailesteanu*, Cornell University
(107053223)

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Topological, Geometric, and Quantum Invariants of 3manifolds, II
Rm 118, Beven Hall Organizers: David Damiano, College of the Holy Cross Scott Taylor, Colby College Helen Wong, Carleton College hwong@carleton.edu

3:00 p.m.
Classifying primitive/Seifert knots.
John Berge, Independent
Brandy Guntel*, The University of Texas at Austin
Sungmo Kang, UQAM
(10705770)

3:30 p.m.
Flipping bridge surfaces and bounds on the stable bridge number.
Jesse Johnson, Oklahoma State University
Maggy Tomova*, The University of Iowa
(107057302)

4:00 p.m.
Common stabilizations of Heegaard splittings.
Jesse Johnson*, Oklahoma State University
(10705780)

4:30 p.m.
The Rank versus Genus Conjecture.
Tao Li*, Boston College
(107057255)

5:00 p.m.
Geometric consequences of algebraic rank in hyperbolic 3manifolds.
Ian P Biringer*, Yale University
Juan Souto, University of Michigan
(107051205)

5:30 p.m.
Inversive distance circle packings and hyperbolic volume.
Ren Guo*, University of Minnesota
(107051330)

Saturday April 9, 2011, 3:00 p.m.5:50 p.m.
Special Session on Undergraduate Research, II
Rm 155, Smith Laboratories Organizers: David Damiano, College of the Holy Cross Giuliana Davidoff, Mount Holyoke College Steve Levandosky, College of the Holy Cross Steven J. Miller, Williams College Steven.J.Miller@williams.edu

3:00 p.m.
A Method for Developing Triple Whist Designs.
John M. Jones*, UndergraduateUniversity of Rhode Island
(10700540)

3:30 p.m.
Fixing Numbers of Trees.
Kara B Greenfield*, Worcester Polytechnic Institute
(107005193)

4:00 p.m.
Random Trinomials & Lower Binomials.
Kenneth B Ascher*, Stony Brook University
(10701459)

4:30 p.m.
From Fibonacci numbers to Central Limit Type Theorems.
Yinghui Wang*, MIT
Steven J Miller, Williams College
(10701177)

5:00 p.m.
SolidColoring Objects Built From Rectangular Bricks.
Lily Du, Smith College
Jessica Lord, Smith College
Micaela Mendlow*, Smith College
Emily Merrill, Smith College
Joseph O'Rourke, Smith College
Viktoria Pardey, Smith College
Rawia Salih, Smith College
Stephanie Wang, Smith College
(107052217)

5:30 p.m.
A Paracomplete Logic and the Sortanatural Numbers.
Cora Waterman*, Smith College
Samantha Lowe, Smith College
Elizabeth Cowdery, Smith College
Sarah Costrell, Smith College
(107003225)
Inquiries: meet@ams.org

