Department of Mathematics
The Pennsylvania State University
State College, Pennsylvania

Mathematics Colloquium, Fall 2001 through Fall 2004

During Fall 2001 through Fall 2004 the Mathematics Colloquium committee was chaired by Stephen Simpson.

Fall 2004

September 2. No Colloquium today.
September 9. No Colloquium today.
September 16. Margaret Symington (Georgia Tech). What Does a Quartic Hypersurface Have in Common With a Spherical Pendulum? Host: Augustin Banyaga.
September 23. No Colloquium today.
September 30. Gunther Uhlmann (University of Washington). The Calderon Problem with Partial Data. Host: Dmitri Burago.
October 7. Dana S. Scott (Carnegie Mellon University). Topology, Categories, and lambda-Calculus. Host: Stephen Simpson.
October 14, 122 Heritage Hall, HUB-Robeson Center. Anatoly Vershik (Saint Petersburg State University, Russia). Universal Metric Space, Random Graph and Related Questions. Host: Dmitri Burago.
October 21. Claude Roger (University of Lyon, France). The Group of Volume Preserving Diffeomorphisms, Geometrical and Physical Aspects: From Hydrodynamics to Branes. Host: Ping Xu.
October 28. Vladimir Retakh (Rutgers). What is Noncommutative Total Positivity? Host: Yuri Zarhin.
November 4. Der-Chen Chang (Georgetown University). On the $\bar\partial$-Neumann Problem. Host: Winnie Li.
November 11. No Colloquium today.
November 18. No Colloquium today. Faculty meeting.
November 25. No Colloquium today. Thanksgiving holiday.
December 2. Hugh Montgomery (University of Michigan). Tiling. Host: Robert Vaughan.
December 9. No Colloquium today.

Spring 2004

January 15. Alice Silverberg (Ohio State University). Some Applications of Number Theory and Algebraic Geometry to Cryptography. Hosts: Nigel Higson, Yuri Zarhin.
January 22. No Colloquium today.
January 29. No Colloquium today.
February 5. Stefanos Venakides (Duke University). Boundary States and Resonances in Photonic Crystals. Host: Spyridon Kamvissis.
February 12. Herman Gluck (University of Pennsylvania). The Gauss Linking Integral on the 3-Sphere and in Hyperbolic 3-Space. Host: Mohammad Ghomi.
February 19. Boris Khesin (University of Toronto). Holomorphic Linking Numbers. Host: Alexander Nabutovsky.
Monday-Thursday, February 23-26. Marker Lectures . Sergiu Klainerman (Princeton). Host: Victor Nistor.
March 4. Yvette Kosmann-Schwarzbach (Ecole Polytechnique, France). Derived Brackets in Differential Geometry. Hosts: Aissa Wade, Ping Xu.
March 11. No Colloquium today. Spring Break.
March 18. Robert Perlis (Louisiana State University). Think Globally, Act Locally. Host: Howard Weiss
March 25, 101 Osmond Building. Philip Holmes (Princeton). Piecewise-Holonomic Mechanics, Hybrid Dynamical Systems, and Escaping Cockroaches. Host: Mark Levi.
April 1. No Colloquium today. Special event in honor of George Andrews.
April 8. No Colloquium today. Mathematics Faculty Meeting.
April 15. Michael E. Taylor (University of North Carolina). Identifying a Region by How its Boundary Vibrates: Analytical and Geometrical Aspects. Hosts: Anna Mazzucato, Victor Nistor.
April 22. Aderemi Kuku (Institute for Advanced Study). A Complete Formulation of the Baum-Connes Conjecture for the Action of Discrete Quantum Groups. Hosts: Augustin Banyaga, Paul Baum.
Tuesday, April 27. Percy Deift (Courant Institute). Universality for Mathematical and Physical Systems. Host: Luen-Chau Li.

Fall 2003

Thursday, September 4. No Colloquium today.
Thursday, September 11. No Colloquium today. Mathematics Faculty Meeting.
Thursday, September 18. Barbara Keyfitz (University of Houston). Multidimensional Conservation Laws: How to Solve Hyperbolic Problems with Elliptic Methods. Hosts: Augustin Banyaga, Yuxi Zheng.
Thursday, September 25. Ken Ono (University of Wisconsin). Groups Associated to Quadratic Fields and Elliptic Curves. Host: George Andrews.
Thursday, October 2. No Colloquium today.
Thursday, October 9. B.-W. Schulze (University of Potsdam). Ellipticity in Pseudo-Differential Algebras on Manifolds with Corners. Hosts: Juan Gil (Penn State Altoona), Victor Nistor.
Thursday, October 16. No Colloquium today. Mathematics Faculty Meeting.
Thursday, October 23, 4:30 PM, 101 Osmond. James Yorke (University of Maryland). Pure Chaos, a New Class of Maps in the Plane: The Movie. Hosts: Bryna Kra, Yakov Pesin.
Thursday, October 30, 4:00 PM, 102 McAllister. Karl Rubin (Stanford). Ranks of Elliptic Curves. Host: Yuri Zarhin.
Thursday, November 6. Krishnaswami Alladi (University of Florida). New Weighted Rogers-Ramanujan Identities Mod 6 and 7 and Their Analytic Representations. Host: George Andrews.
Thursday, November 13. No Colloquium today.
Monday, November 17, 1:20-5:30 PM, McAllister Building. Special event in honor of Yakov Pesin.
Thursday, November 20. Kenneth B. Stolarsky (University of Illinois). q-Analogues, Conformal Mapping, Chebyshev Polynomials, and Prime Numbers. Host: George Andrews.
Thursday, November 27. No Colloquium today. Thanksgiving holiday.
Thursday, December 4. Arkady Vaintrob (University of Oregon). Alexander-Conway Polynomial, Milnor Numbers and Spanning Trees. Host: Sergei Tabachnikov.
Thursday, December 11. Carl B. Pomerance (Dartmouth). Recent Developments in Primality Testing. Host: Robert Vaughan. Note: Today's Departmental Tea is in the basement of McAllister, 3:15-4:00 PM.

Spring 2003

Thursday, January 16. No Colloquium today.
Thursday, January 23. Christopher Woodward (Rutgers). Quantum Groups and Non-Euclidean Geometry. Host: Ping Xu.
Thursday, January 30. Ae Ja Yee (University of Illinois). Partition Identities and Combinatorial Proofs. Host: George Andrews.
Thursday, February 6. Alexander Berkovich (University of Florida). Partition Identities from Euler to Goellnitz and Beyond. Host: George Andrews.
Thursday, February 13. Nicolai Reshetikhin (UC Berkeley). Local Geometry of Random 3D Young Diagrams. Host: Luen-Chau Li.
Thursday, February 20. Martin Kassabov (Yale University). Kazhdan Property and Finite Graphs. Host: Edward Formanek.
Tuesday, February 25, 2:30 PM, 116 McAllister. Steven Krantz (Washington University in St. Louis). Uniqueness Theorems for Holomorphic Mappings. Host: George Andrews.
Thursday, February 27. Eyal Markman (University of Massachusetts). Symmetries in Algebraic Geometry. Host: Luen-Chau Li.
Thursday, March 6. Bruce Berndt (University of Illinois). Ramanujan's Contributions to Eisenstein Series, Especially in his Lost Notebook. Host: George Andrews.
Thursday, March 13. No Colloquium today. Spring Break.
Thursday, March 20. Dusa McDuff (SUNY Stony Brook). The Topological Properties of Groups of Symplectomorphisms. Host: Bryna Kra.
Thursday, March 27. Andrei Suslin (Northwestern). Recent Developments in Motivic Cohomology Theory. Host: Leonid Vaserstein.
Monday-Thursday, March 31 - April 3. Marker Lectures. Shmuel Weinberger (University of Chicago). Host: Gary Mullen.
1. Monday, March 31, 8:00 PM, 111 Wartik. Complexity and Geometric Optimization.
2. Tuesday, April 1, 4:30 PM, 109 Osmond. The Case of Embeddings.
3. Wednesday, April 2, 4:30 PM, 109 Osmond. The Local-Global Principle for Singular Spaces.
4. Thursday, April 3, 4:30 PM, 109 Osmond. The Calculus of Symmetry.
Friday, April 4, 3:30-4:30 PM, 102 McAllister. Wen Shen (SISSA, Trieste). Systems of Conservation Laws with Relaxation. Host: Yuxi Zheng.
Thursday, April 10. Alberto Bressan (SISSA, Trieste). Recent Trends in the Theory of Conservation Laws. Host: Yuxi Zheng.
Thursday, April 17. Cancelled. J. M. Cushing (University of Arizona). Nonlinear Dynamics and Ecology. Host: Howard Weiss
Thursday, April 17. Jeffrey Lagarias (AT&T Research Labs). Wavelets, Tilings, and Number Theory. Host: Winnie Li.
Thursday, April 24. No Colloquium today. Eberly Lecture: Michael Atiyah, Geometry and Physics from Plato to Hawking, 4:30 PM, 117 HUB.
Thursday, May 1. Dorian Goldfeld (Columbia). Counting Congruence Subgroups. Host: Joseph Hundley.

Fall 2002

Thursday, September 5. Michael Lin (Ben Gurion University). Ergodic Characterizations of Reflexivity of Banach Spaces. Host: Arkady Tempelman.
Thursday, September 19. Ravi A. Rao (Tata Institute). Raga Bhimpalasi: The Vaserstein-Suslin Jugalbandhi. Host: Leonid Vaserstein.
Thursday, September 26. No Colloquium today. Mathematics Faculty Meeting.
Thursday, October 3. Joseph Landsberg (Georgia Tech). Series of Lie groups, after Freudenthal, Deligne and Vogel. Host: Sergei Tabachnikov.
Thursday, October 10. No Colloquium today.
Thursday, October 17. Roger Penrose (Oxford University and Penn State). Twistor Geometry. Host: Ping Xu.
Thursday, October 24. Douglas Arnold (University of Minnesota). From Exact Sequences to Colliding Black Holes: Differential Complexes in Numerical Analysis. Host: Jinchao Xu.
Thursday, October 31. James Stasheff (UNC Chapel Hill). An Introduction to Operads With Applications to Physics. Host: Ping Xu.
Thursday, November 7. Mikhail Shubin (Northeastern University). Discreteness of Spectrum for Schrödinger Operators. Host: Yuri Zarhin.
Thursday, November 14. Alberto Bressan (SISSA, Trieste). One Dimensional Hyperbolic Systems of Conservation Laws. Host: Yuxi Zheng.
Thursday, November 21. Kalyan Chatterjee (Penn State, Economics). Some Mathematical Models in Business and Economics. Host: Leonid Vaserstein.
Thursday, November 28. No Colloquium today. Thanksgiving.
Thursday, December 5. No Colloquium today.
Thursday, December 12. Boris Tsygan (Northwestern). Some Problems in Noncommutative Differential Geometry. Host: Ping Xu.

Spring 2002

Thursday, January 10. No Colloquium today.
Thursday, January 17. Robert Ghrist (Georgia Tech). An Introduction to Topological Robotics. Host: John Roe.
Thursday, January 24. Gunnar Martinsson (University of Texas). Model Selection in Problems Involving Multiple Length-Scales. Host: Jinchao Xu.
Thursday, January 31. Hugh Montgomery (University of Michigan). Irregularities of Distribution. Host: Robert Vaughan.
Thursday, February 7. Thomas D. Schneider (National Cancer Institute). Flippers, Flappers and Flip-Flops in DNA Binding. Host: Howard Weiss.
Thursday, February 14. Andy Ruina (Cornell University). The Possible Physics (Mechanics) of Walking. Host: Mark Levi.
Thursday, February 21. Klaus Schmitt (University of Utah). Variational Inequalities of Elliptic and Parabolic Type. Host: Jon Jacobsen.
Thursday, February 28. Dennis Shasha (Computer Science, Courant Institute, NYU). Mathematical Insight, Science, and Finance. Host: Gary Mullen.
Thursday, March 7. No Colloquium today. Spring break.
Monday-Thursday, March 11-14, 109 Osmond. Marker Lectures. Timothy Gowers (Cambridge University). Host: Bryna Kra.
1. Monday, March 11, 8:00 PM. Can Mathematics Be Taught?
2. Tuesday, March 12, 4:30 PM. Arithmetic Progressions of Length Three
3. Wednesday, March 13, 4:30 PM. Arithmetic Progressions of Length Four
4. Thursday, March 14, 4:30 PM. What Can Be Said About a General Banach Space?
Monday, March 18, 3:30 PM, 102 McAllister. Gang Tian (MIT). Isotopy of Symplectic Surfaces in 4-Spaces. Host: Jinchao Xu.
Thursday, March 21. Jozsef Beck (Rutgers University). Tic-Tac-Toe Like Games. Host: Robert Vaughan.
Thursday, March 28. Aleksey Parshin (Steklov Institute, Moscow). Local Constructions in Algebraic Geometry. Host: Yuri Zarhin.
Thursday, April 4. Shankar Venkataramani (University of Chicago). What Can We Learn From a Crumpled Sheet?. Host: Chun Liu.
Thursday, April 11. Ken Ono (University of Wisconsin). Values of Modular Functions and Divisors of Modular Forms Host: Winnie Li.
Thursday, April 18. Walter Craig (McMaster University). On Solitary Water Waves. Host: Diane Henderson.
Thursday, April 25. No Colloquium today.

Fall 2001

Thursday, August 23, 4:00 PM, 102 McAllister. C. David Levermore (University of Maryland). Fluid Dynamical Limits for the Boltzmann Equation. Host: Mark Levi.
Thursday, August 30. No Colloquium today.
Thursday, September 6. No Colloquium today.
Thursday, September 13. No Colloquium today. Mathematics Faculty Meeting. Host: Gary Mullen
Thursday, September 20. No Colloquium today. VIGRE Ice Cream Social. Host: George Andrews.
Thursday, September 27, 4:30 PM, 102 McAllister. Valentin Ovsienko (Center for Theoretical Physics, Luminy, France). Differential Operators and Differential Geometry. Host: Sergei Tabachnikov.
Thursday, October 4. No Colloquium today.
Thursday, October 11, 4:30 PM, Regency Room, Atherton Hotel. Refreshments 4:00 PM, Regency Room, Atherton Hotel. Michael Shub (IBM Watson Research Center). Order out of Chaos? Some Recent Examples. Host: Yakov Pesin.
Thursday, October 18, 4:30 PM, 102 McAllister. Alexei Sossinski (Independent University of Moscow). Unknotting: New Results About an Old Problem. Host: Sergei Tabachnikov.
Thursday, October 25, 4:30 PM, 102 McAllister. Jeffrey Lagarias (AT&T Research Labs). Trisecting Angles: Morley's Theorem and Related Geometry. Host: Winnie Li.
Thursday, November 1. No Colloquium today.
Thursday, November 8, 4:30 PM, 102 McAllister. David Kinderlehrer (Carnegie Mellon University). Markov Chain Paradigm for the Brownian Motor: Thoughts About Diffusion Mediated Transport. Host: Yuxi Zheng.
Thursday, November 15, 4:30 PM, 102 McAllister. Leonid Fukshansky (University of Freiburg, Biology). Theoretical Approaches in the Molecular Genetics - Background, Methods, Open Problems. Host: Dmitri Burago.
Thursday, November 22. No Colloquium today. Thanksgiving.
Thursday, November 29, 4:30 PM, 102 McAllister. Simon Thomas (Rutgers University). The Asymptotic Geometry of Finitely Generated Groups. Host: Edward Formanek.
Thursday, December 6, 4:30 PM, 102 McAllister. Alexander Nabutovsky (University of Toronto). Geometric Variational Problems and Non-Computable Functions. Host: Dmitri Burago.