Mathematics Seminars for the week of January 31, 2005
Colloquium
Thursday, 3:30, in VinH 16Professor Robert Pego
of Carnegie Mellon University
will speak on
"Fifty years after Fermi, Pasta and Ulam: Nonlinear waves in Hamiltonian
chains at low energy"
The celebrated investigations of Fermi, Pasta and Ulam published in
1955 were key to great developments in nonlinear science during the last half-
century. I will review some of the story, and discuss some recently proved
results regarding the existence and dynamic stability of nonlinear wave pulses
in infinite Hamiltonian chains of particles. The new result (joint with Gero
Friesecke) is that on each sufficiently low energy surface, an open set of
initial data permanently concentrates most of its energy in a single coherent
mode (solitary wave). The proof involves a number of attractive ideas,
including symplectic geometry in infinite dimensions, a new kind of Floquent
theory, and a bit of hard multiscale analysis that relates the (nonintegrable)
FPU chain to the (integrable) Korteweg-de Vries PDE.
Monday, 31 Jan 2005
Materials seminar: multiscale focus group:
at 11:15 in LindH 409
-
Aaron Nung Kwan Yip
from Purdue University
will speak on "Pinning and De-Pinning Phenomena in Materials Interfacial
Problems"
Dynamical Systems Seminar:
at 3:35 in VinH 570
-
Professor Robert Pego
from Carnegie Mellon University
will speak on "Dynamic scaling, Smoluchowski's coagulation equation and Burgers
turbulence"
Real Analysis [In memory of Gene Fabes]:
at 3:35 in VinH 209
-
Professor Peter Rejto
will speak on "Note on Hadamard's finite part"
Tuesday, 1 Feb 2005
Special Lecture:
at 10:10 in VinH 313
-
Professor Per-Gunnar Martinsson
from Yale University
will speak on "Fast direct solvers for boundary value problems"
IMA Postdoc Seminar:
at 11:15 in LindH 409
-
Professor Hailiang Liu
from Iowa State University
will speak on "Wave breaking in a class of nonlocal dispersive wave equations"
Student Topology:
at 11:15 in VinH 203B
-
... Will not meet this week
Student Number Theory:
at 12:20 in VinH 203B
-
... Will not meet this week
Introduction to Geometric Measure Theory:
at 1:25 in LindH 409
-
Professor Simon Morgan
will speak on "The deformation theorem"
Math Physics:
at 1:25 in VinH 570
-
Mr. Eric Harrelson
will speak on "Algebraic structure of the homology of tree level open-closed string
backgrounds"
Jr. Colloquium:
at 3:35 in VinH 16
-
Ms Magdalena Stolarska
will speak on "A computational model of cell motility"
Wednesday, 2 Feb 2005
Materials seminar: Singularities Focus Group:
at 11:15 in Lind Hall 409
-
... Will not meet this week
P.D.E.:
at 3:35 in VinH 301
-
Professor Robert Pego
from Carnegie Mellon University
will speak on "Divorcing pressure from viscosity in incompressible Navier-Stokes
dynamics"
Thursday, 3 Feb 2005
Applied Mathematics and Numerical Analysis:
at 11:15 in VinH 570
-
Professor Jon Wilkening
from Courant Institute
will speak on "Stress-driven grain boundary diffusion: modeling, analysis and
numerical methods"
Student Number Theory:
at 12:20 in VinH 203B
-
Mr. Ben Rosenfield
will speak on "Elementary L-functions"
Image Processing and Analysis Working:
at 12:20 in Tate 150
-
Professor Kelvin Lim
from Center for Magnetic Resonance Research
will speak on "Diffusion tensor imaging"
Differential Geometry and Sympletic Topology:
at 1:25 in VinH 203A
-
Professor Liviu Ornea
from University of Bucharest
will speak on "Deformations and embeddings of locally conformal Kahler
manifolds"
Colloquium:
at 3:30 in VinH 16
-
Professor Robert Pego
from University of Maryland
will speak on "Fifty years after Fermi, Pasta and Ulam: nonlinear waves in Hamiltonian
chains at low energy"
Friday, 4 Feb 2005
Materials Seminar:
at 11:15 in LindH 409
-
... Will not meet this week
Industrial Problems Seminar:
at 1:25 in VinH 570
-
... Will not meet this week
Student Combinatorics:
at 2:30 in VinH 203B
-
Sangwook Kim
will speak on "Discrete Morse theory"
Combinatorics:
at 3:35 in VinH 364
-
Professor Ezra Miller
will speak on "Stanley's simplicial poset conjecture"
Probability:
at 3:35 in VinH 206
-
Professor Mikhail Safonov
will speak on "Growth lemmas in probability and analysis"
Automorphic Forms and Number Theory:
at 4:40 in VinH 364
-
Professor Paul Garrett
will speak on "Review of Artin L-functions"
Professor Robert Pego, University of Maryland, will visit
the Mathematics Department for one month beginning January 18, 2005. His
visit is made possible by the Ordway Endowment. Professor Pego's office,
during his stay, will be Vincent Hall 350; you can reach him by phone at 625-3491.
