
AMS Sectional Meeting Program by Day
Current as of Sunday, May 3, 2009 00:21:11
Program 
Deadlines 
Registration/Housing/Etc. 
Inquiries: meet@ams.org
2009 Spring Eastern Section Meeting
Worcester, MA, April 2526, 2009 (Saturday  Sunday)
Meeting #1050
Associate secretaries: Steven H Weintraub, AMS steve.weintraub@lehigh.edu
Saturday April 25, 2009

Saturday April 25, 2009, 7:30 a.m.4:00 p.m.
Registration
Foyer of Room 102, Higgins Laboratories

Saturday April 25, 2009, 7:30 a.m.4:00 p.m.
Exhibit and Book Sale
Room 102, Higgins Laboratories

Saturday April 25, 2009, 8:00 a.m.10:50 a.m.
Special Session on Symplectic and Contact Topology, I
Room 104, Salisbury Laboratories Organizers: Peter Albers, Purdue University/ETH Zurich palbers@math.purdue.edu
Basak Gurel, Vanderbilt University basak.gurel@vanderbilt.edu

Saturday April 25, 2009, 8:00 a.m.10:50 a.m.
Special Session on The Mathematics of Climate Change, I
Room 114, Higgins Laboratories Organizers: Catherine A. Roberts, College of the Holy Cross croberts@holycross.edu
Gareth E. Roberts, College of the Holy Cross
Mary Lou Zeeman, Bowdoin College

8:00 a.m.
Introduction to the Mathematics of Climate Change.
Mary Lou Zeeman*, Bowdoin College and Cornell University
(105086107)

9:00 a.m.
Periodic Versus Constant Proportion Fish Exploitation Policies.
AbdulAziz Yakubu*, Howard University
Jon Conrad, Cornell University
Mary Lou Zeeman, Bowdoin College
(10509299)

9:30 a.m.
Climateinduced changes in spatial distribution of Northwest Atlantic fish stocks: implications for management.
Janet A. Nye*, NOAA National Marine Fisheries Service, Northweast Fisheries Science Center
Jason S. Link, NOAA National Marine Fisheries Service Northeast Fisheries Science Center
Jonathan A. Hare, NOAA National Marine Fisheries Service Northeast Fisheries Science Center
(10509267)

10:00 a.m.
North Atlantic Climate Variability: Preliminary Analysis of Historical Weather Data and Stable Isotope Time Series from Cave Dripwater and a HoloceneAge Stalagmite from Bermuda.
Steven E Gaurin*, University of Massachusetts
(105000155)

10:30 a.m.
Audience discussion on the role of mathematics in climate change research, moderated by Mary Lou Zeeman.

Saturday April 25, 2009, 8:00 a.m.10:50 a.m.
Special Session on Discrete Geometry and Combinatorics, I
Room 116, Higgins Laboratories Organizers: Egon Schulte, Northeastern University schulte@neu.edu
Brigitte Servatius, Worcester Polytechnic Institute

8:00 a.m.
Equivalent Mechanisms and Configuration Spaces.
Servatius Herman*, Worcester Polytechnic Institute
(10500554)

8:30 a.m.
Periodic Rigidity.
Elissa Ross*, Department of Mathematics and Statistics, York University
(10505271)

9:00 a.m.
Symmetry as a sufficient condition for a finite flex.
Bernd Schulze*, York University
(10505252)

9:30 a.m.
Bodyandcad geometric constraint systems.
Kirk Haller, SolidWorks Corporation
Audrey LeeSt.John*, Mount Holyoke College
Meera Sitharam, University of Florida
Ileana Streinu, Smith College
Neil White, University of Florida
(10505182)

10:00 a.m.
If you can hide behind it, can you hide inside it?
Daniel A Klain*, University of Massachusetts Lowell
(10505284)

10:30 a.m.
Global Rigidity.
Robert Connelly*, Cornell University
Walter J Whiteley, York University
(10505240)

Saturday April 25, 2009, 8:00 a.m.10:50 a.m.
Special Session on Algebraic Graph Theory, Association Schemes, and Related Topics, I
Room 218, Higgins Laboratories Organizers: William J. Martin, Worcester Polytechnic Institute martin@wpi.edu
Sylvia A. Hobart, University of Wyoming

Saturday April 25, 2009, 8:20 a.m.10:50 a.m.
Special Session on Analysis of Weakly Differentiable Maps with Constraints and Applications, I
Room 305, Salisbury Laboratories Organizers: Fengbo Hang, Courant Institute, New York University
Mohammad Reza Pakzad, University of Pittsburgh pakzad@pitt.edu

8:20 a.m.
The Lattice Faddeev Model.
Hans K Shmidheiser*, Courant Institute, New York University
(10505772)

9:00 a.m.
Rigidity and density of smooth mappings in Sobolev spaces of isometries.
Marta Lewicka, University of Minnesota
Maria Giovanna Mora, Sissa, Italy
Reza Pakzad*, University of Pittsburgh
(105046132)

9:40 a.m.
Characterizations of Sobolev spaces and related inequalities.
HoaiMinh Nguyen*, Institute for Advanced Study, School of Mathematics
(105026120)

10:20 a.m.
Highly regular surjections between Carnot groups.
Piotr Hajlasz*, University of Pittsburgh
Jeremy T. Tyson, University of Illinois
(105022168)

Saturday April 25, 2009, 9:00 a.m.10:50 a.m.
Special Session on Number Theory, I
Room 154, Higgins Laboratories Organizers: John T. Cullinan, Bard College cullinan@bard.edu
Siman Wong, University of Massachusetts, Amherst

Saturday April 25, 2009, 9:00 a.m.10:50 a.m.
Special Session on QuasiStatic and Dynamic Evolution in Fracture Mechanics
Room 407, Salisbury Laboratories Organizers: Christopher J. Larsen, Worcester Polytechnic Institute cjlarsen@wpi.edu

Saturday April 25, 2009, 9:00 a.m.10:50 a.m.
Special Session on Scaling, Irregularities, and Partial Differential Equations, I
Room 406, Salisbury Laboratories Organizers: Umberto Mosco, Worcester Polytechnic Institute
Bogdan M. Vernescu, Worcester Polytechnic Institute vernescu@wpi.edu

Saturday April 25, 2009, 9:00 a.m.10:50 a.m.
Special Session on Real and Complex Dynamics of Rational Difference Equations with Applications, I
Room 202, Higgins Laboratories Organizers: M. R. S. Kulenovic, University of Rhode Island mkulenovic@mail.uri.edu
Orlando Merino, University of Rhode Island

Saturday April 25, 2009, 9:30 a.m.10:50 a.m.
Special Session on Effective Dynamics and Interactions of Localized Structures in Schrödinger Type Equations, I
Room 105, Salisbury Laboratories Organizers: Fridolin Ting, Lakehead University fting@lakeheadu.ca

Saturday April 25, 2009, 11:00 a.m.11:50 a.m.
Invited Address
Fractal spectra between Scylla and Charybdis.
Room 115, Salisbury Laboratories
Umberto Mosco*, Worcester Polytechnic Institute
(10503502)

Saturday April 25, 2009, 2:00 p.m.2:50 p.m.
Invited Address
Topology of weakly differentiable maps.
Room 115, Salisbury Laboratories
Fengbo Hang*, Courant Institute of New York University
(10505803)

Saturday April 25, 2009, 3:00 p.m.5:50 p.m.
Special Session on Effective Dynamics and Interactions of Localized Structures in Schrödinger Type Equations, II
Room 105, Salisbury Laboratories Organizers: Fridolin Ting, Lakehead University fting@lakeheadu.ca

3:00 p.m.
Realistic Models of NLS Large time behavior and Applications to Physics.
Avy Soffer*, Department of Mathematics, Rutgers University
(105035167)

3:30 p.m.
Dynamics of vortices in a damped GrossPitaevskii equation.
Matthias Kurzke, University of Bonn
Christof Melcher, Oxford University
Roger Moser, University of Bath
Daniel Spirn*, University of Minnesota
(105035127)

4:00 p.m.
Solitary Waves in the Earth's Interior and their Stability.
Gideon Simpson*, University of Toronto
Michael I Weinstein, Columbia University
(105035112)

4:30 p.m.
Regularization of collapse in dynamics of biological cells.
Pavel M Lushnikov*, Department of Mathematics and Statistics, University of New Mexico
Mark Alber, Department of Mathematics, University of Notre Dame
Nan Chen, University of Notre Dame
(105092154)

5:00 p.m.
Meanfield limit of quantum systems of many bosons.
Israel Michael Sigal*, University of Toronto / Institute for Advanced Study
(105081153)

5:30 p.m.
Dynamics of solitons of the nonlinear Schroedinger / Gross Pitaevskii equation.
Michael I Weinstein*, Columbia University
(105035151)

Saturday April 25, 2009, 3:00 p.m.6:30 p.m.
Special Session on Analysis of Weakly Differentiable Maps with Constraints and Applications, II
Room 305, Salisbury Laboratories Organizers: Fengbo Hang, Courant Institute, New York University
Mohammad Reza Pakzad, University of Pittsburgh pakzad@pitt.edu

3:00 p.m.
On buckling instability in hyperelasticity.
Yury Grabovsky*, Temple University
Lev Truskinovsky, Ecole Polytechnique
(105074166)

3:50 p.m.
A scaling law for $3$d nonlinear elastic energies of thin plates with strain at free equilibria.
Marta Lewicka*, University of Minnesota
Reza Pakzad, University of Pittsburgh
(105046113)

4:30 p.m.
Some Remarks on Total Variation Flow.
Robert Hardt*, Rice University
Rolf Ryham, Rice University
(10503583)

5:20 p.m.
Uniqueness for ordinary differential equations associated with quasiconformal mappings.
Tadeusz Iwaniec, Syracuse University
Leonid V. Kovalev*, Syracuse University
Jani Onninen, Syracuse University
(10503492)

6:00 p.m.
Gamma quasiregular mappings and nonlinear planar eliptic systems.
Daniel Faraco*, Universidad Autonoma de Madrid
(105035175)

Saturday April 25, 2009, 3:00 p.m.6:20 p.m.
Special Session on Symplectic and Contact Topology, II
Room 104, Salisbury Laboratories Organizers: Peter Albers, Purdue University/ETH Zurich palbers@math.purdue.edu
Basak Gurel, Vanderbilt University basak.gurel@vanderbilt.edu

3:00 p.m.
Complexifications of Morse functions and exact Lagrangian submanifolds in cotangent bundles.
Joseph A Johns*, NYU
(10505331)

3:30 p.m.
Connexity of some symplectomorphism groups.
Martin Pinsonnault*, The University of Western Ontario
(10505346)

4:00 p.m.
Coisotropic Submanifolds, Leafwise Fixed Points, and Presymplectic Embeddings.
Fabian J. Ziltener*, University of Toronto
(10505330)

4:30 p.m.
A Symplectic BrunnMinkowski Inequality.
Yaron Ostrover*, MIT
(10505143)

5:00 p.m.
Lagrangian spherebundles.
Tim Perutz*, Columbia University
(10505721)

5:30 p.m.
Open string topology and classical knots.
Dennis Sullivan, Stony Brook University
Michael Sullivan*, University of Massachusetts Amherst
(10505715)

6:00 p.m.
GKM Fiber Bundles.
Catalin Zara*, University of Massaschusetts Boston
(10505524)

Saturday April 25, 2009, 3:00 p.m.5:50 p.m.
Special Session on Topological Robotics
Room 407, Salisbury Laboratories Organizers: Li Han, Clark University
Lee N. Rudolph, Clark University lrudolph@black.clarku.edu

3:00 p.m.
A look at polyhedral products.
Alexander I. Suciu*, Northeastern University
(105057171)

3:30 p.m.
Motion planning in tori and topological complexity of basisconjugating automorphism groups.
Daniel C. Cohen, Louisiana State University
Goderdzi Pruidze*, University of Louisiana
(105055176)

4:00 p.m.
Knot tying with singlepiece fixtures.
Matthew P. Bell*, Dartmouth College
Devin J. Balkcom, Dartmouth College
(105074165)

4:30 p.m.
Extremal configurations of revolutejointed robot arms.
Ciprian S. Borcea*, Rider University
Ileana Streinu, Smith College
(10505377)

5:00 p.m.
SimplexTree Based Kinematics of Foldable Objects as Multibody Systems Involving Loops.
Li Han*, Clark University
Lee Rudolph, Clark University
(105057159)

5:30 p.m.
Planning Regular Homotopies of Planar Loops with Revolute Joints.
Lee Rudolph*, Clark University
Li Han, Clark University
(105057160)

Saturday April 25, 2009, 3:00 p.m.5:45 p.m.
Special Session on The Mathematics of Climate Change, II
Room 114, Higgins Laboratories Organizers: Catherine A. Roberts, College of the Holy Cross croberts@holycross.edu
Gareth E. Roberts, College of the Holy Cross
Mary Lou Zeeman, Bowdoin College

3:00 p.m.
Weather prediction and Chaos.
James A Yorke*, Univ of Maryland, Math & Physics Depts and IPST
(10503750)

3:30 p.m.
Poleward Expansion of Hadley Cells.
William F. Langford*, University of Guelph, Guelph ON Canada
Greg Lewis, University of Ontario Institute of Technology, Oshawa ON Canada L1H7K4
(10508660)

4:00 p.m.
Understanding the relative humidity distribution of the atmosphere using a simple model.
Paul A O'Gorman*, Department of Earth, Atmospheric, and Planetary Sciences
(10500065)

4:30 p.m.
A componentbased framework for semiempirical, processbased modeling of carbon flux from terrestrial ecosystems.
Sudeep Samanta*, Woods Hole Research Center
Richard A. Houghton, Woods Hole Research Center
(105000145)

5:00 p.m.
Audience discussion on the role of mathematics in climate change research, moderated by Gareth Roberts.

Saturday April 25, 2009, 3:00 p.m.5:50 p.m.
Special Session on Number Theory, II
Room 154, Higgins Laboratories Organizers: John T. Cullinan, Bard College cullinan@bard.edu
Siman Wong, University of Massachusetts, Amherst

3:00 p.m.
Weyl Group Multiple Dirichlet Series and GTPatterns: Part I.
Jennifer Beineke*, Western New England College
Ben Brubaker, MIT
Sharon Frechette, College of the Holy Cross
(105011163)

3:30 p.m.
Weyl group multiple Dirichlet series, and GT patterns: Part II.
Jennifer Beineke, Western New England College
Ben Brubaker, Massachusetts Institute of Technology
Sharon Frechette*, College of the Holy Cross
(105011150)

4:00 p.m.
Blaschke Product Mappings: Visualization and Automorphic Properties.
Cristina Ballantine*, College of the Holy Cross
Dorin Ghisa, York University
(105030126)

4:30 p.m.
Computations with Overconvergent Modular Symbols.
David Pollack*, Wesleyan University
Robert Pollack, Boston University
(105011141)

5:00 p.m.
BernoulliHurwitz numbers, Wieferich primes and Galois representations.
Álvaro LozanoRobledo*, University of Connecticut  Storrs
(10501185)

5:30 p.m.
Galois invariance of local root numbers.
David E. Rohrlich*, Boston University
(10501135)

Saturday April 25, 2009, 3:00 p.m.5:50 p.m.
Special Session on Discrete Geometry and Combinatorics, II
Room 116, Higgins Laboratories Organizers: Egon Schulte, Northeastern University schulte@neu.edu
Brigitte Servatius, Worcester Polytechnic Institute

3:00 p.m.
Growth of Homogeneous Planar Tessellations.
Stephen S. Graves, Syracuse University
Mark E. Watkins*, Syracuse University
(10500576)

3:30 p.m.
On the Number of Spanning Trees a Planar Graph Can Have.
Andre Schulz*, Smith College
Kevin Buchin, TU Eindhoven
(10500570)

4:00 p.m.
Flattening singlevertex origami: the nonexpansive case.
Gaiane Panina, Institute for Informatics and Automation, StPetersburg, Russia
Ileana Streinu*, Smith College
(10505278)

4:30 p.m.
What makes Materials Flexible or Rigid?
Michael F Thorpe*, Arizona State University
(10505156)

5:00 p.m.
A catalog of selfdual plane graphs with maximum degree 4.
Jack E Graver*, Syracuse University
Elizabeth J Hartung, Syracuse University
(10500551)

5:30 p.m.
Remarkable Delaunay Polytopes derived from the Leech lattice.
Konstantin Rybnikov*, University of Massachusetts at Lowell
(105052174)

Saturday April 25, 2009, 3:00 p.m.5:20 p.m.
Special Session on Scaling, Irregularities, and Partial Differential Equations, II
Room 406, Salisbury Laboratories Organizers: Umberto Mosco, Worcester Polytechnic Institute
Bogdan M. Vernescu, Worcester Polytechnic Institute vernescu@wpi.edu

3:00 p.m.
Remarks on nonlinear elliptic equations.
Louis Nirenberg*, Courant Institute
(105035179)

3:30 p.m.
Gradient Estimates for the Perfect Conductivity Problem.
Yanyan Li*, Rutgers University, New Brunswick, New Jersey
Ellen ShiTing Bao, University of Minnesota
Biao Yin, Rutgers University
(105035100)

4:00 p.m.
Pressure Beneath a Stokes Wave.
Walter A Strauss*, Brown University
(105035125)

4:30 p.m.
Partial Differential Equations Arising from Electrostatic MEMS.
Yujin Guo*, School of Mathematics, University of Minnesota
(10503573)

5:00 p.m.
Uniqueness of locally invariant Laplacian, Dirichlet form and Brownian motion on Sierpinski carpets.
Alexander Teplyaev*, University of Connecticut
(105060115)

Saturday April 25, 2009, 3:00 p.m.5:50 p.m.
Special Session on Algebraic Graph Theory, Association Schemes, and Related Topics, II
Room 218, Higgins Laboratories Organizers: William J. Martin, Worcester Polytechnic Institute martin@wpi.edu
Sylvia A. Hobart, University of Wyoming

3:00 p.m.
On pseudocyclic association schemes.
M. E. Muzychuk*, Netanya Academic College, Netanya, Israel
I. N. Ponomarenko, Institute of Mathematics, St. Petersburg, Russia
(10500569)

3:30 p.m.
Distanceregular graphs with tails.
Aleksandar Jurisic*, Faculty of Computer and Information Science, University of Ljubljana and IMFM
Paul Terwilliger, Department of Mathematics, University of WisconsinMadison
(105005102)

4:00 p.m.
Nonexistence of Certain Amorphous Association Schemes.
Jianmin Ma*, Oxford College of Emory University
(10500597)

4:30 p.m.
Towards a classification of the tridiagonal pairs.
Paul Terwilliger*, University of Wisconsin
(105005162)

5:00 p.m.
An Inequality for Leonard Systems.
John Caughman*, Portland State University
(105005170)

5:30 p.m.
Leonard pairs associated with $sl_2$.
Hasan Alnajjar, University of Jordan
Brian W Curtin*, University of South Florida
(10500588)

Saturday April 25, 2009, 3:00 p.m.5:20 p.m.
Special Session on Real and Complex Dynamics of Rational Difference Equations with Applications, II
Room 202, Higgins Laboratories Organizers: M. R. S. Kulenovic, University of Rhode Island mkulenovic@mail.uri.edu
Orlando Merino, University of Rhode Island

3:00 p.m.
Global Bifurcation for Competitive Systems in the Plane.
M R.S. Kulenovic*, Department of Mathematics, University of Rhode Island
Orlando Merino, Department of Mathematics, University of Rhode Island
(10503944)

3:30 p.m.
Dynamics of certain classes of periodic rational difference equations.
Vlajko L Kocic*, Xavier University of Louisiana
(10503998)

4:00 p.m.
On the Character of the System $$ x_{n+1}=\frac{\alpha_{1}}{x_{n} + y_{n}} \quad , \quad y_{n+1}=\frac{\alpha_{2} + y_{n}}{B_{2} x_{n} + y_{n}} $$.
Y. Kostrov*, University of Rhode Island
E Grove, University of Rhode Island
S Schultz, Providence College
M Radin, RIT
(105039136)

4:30 p.m.
Two Species Competitive Model with Allee's Effect.
Ann Brett*, University of Rhode Island
Mustafa Kulenovic, University of Rhode Island
(10503964)

5:00 p.m.
Unboundedness for some classes of rational difference equations.
Gabriel Lugo, University of Rhode Island
Frank J Palladino*, Stony Brook University
(10503989)
Inquiries: meet@ams.org

