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Seminars for the week of April 25, 2005
Colloquium
Thursday, 3:30, in VinH 16Professor Alain Chenciner
of Universite Paris VII
will speak on
"Symmetries and “simple” solutions of the classical n-body
problem"
The Lagrangian of the classical n-body problem has well known symmetries: isometries of the ambient Euclidean space and changes of scale coming from the homogeneity of the potential. To these symmetries are associated Keplerian-like solutions of the problem, the so-called homographic motions, well known in Minneapolis. Together with time translations and permutations of equal masses, these symmetries act on the set of loops of a given period in the configuration space, leaving the action functional invariant. Minimization of the action on well-chosen spaces of symmetric loops of a given period leads to remarkable periodic solutions of the n-body problem which are in a sense the simplest for which the shape does not stay constant. The main technical problem is understanding why collisions, also well known in Minneapolis, do not arise in minimizers under symmetry copnstraints, though they do arise very often under homological of homotopical constraints.
Monday, 25 Apr 2005
- Professor Stephen J. Watson will speak on "Title: to be announced"
- ... Will not meet this week
- ... Will not meet this week
- Professor W.N. Everitt from University of Warwick, UK will speak on "The Algebra of Shin-Zettl Matrices"
-
Materials seminar: Multiscale focus group:
at 11:15 in LindH 305
-
Commutative Algebra/Algebraic Geometry:
at 3:30 in VinH 311
-
Real Analysis [In memory of Gene Fabes]:
at 3:35 in VinH 209
-
Dynamical Systems Seminar:
at 3:35 in VinH 570
Tuesday, 26 Apr 2005
- ... Will not meet this week
- Professor Dan Kushnir from Weizmann Institute will speak on "Fast multi-scale clustering and manifold identification in 2D and 3D"
- ... Will not meet this week
- Professor Alexander Voronov will speak on "Feynman diagrams: introduction"
- Akash Anand will speak on "An efficient high-order algorithm for scattering by “thin structures”"
-
Student Lie Theory:
at 10:10 in VinH 203B
-
IMA Postdoc Seminar:
at 11:15 in LindH 409
-
Student Topology:
at 11:15 in VinH 203B
-
Math Physics:
at 1:25 in VinH 570
-
Jr. Colloquium:
at 3:35 in VinH 16
Wednesday, 27 Apr 2005
- Professor Stan Alama from McMaster University will speak on "Vortices for Ginzburg-Landau models in multiply connected domains"
- Professor Luan Hoang from Texas A&M University will speak on "Asymptotic analysis of the helicity in 3D periodic Navier-Stokes equations"
- ... Will not meet this week
-
Materials seminar: Singularities Focus Group:
at 11:15 in Lind Hall 409
-
Joint Dynamical Systems and P.D.E.:
at 3:35 in VinH 301
-
Representation of p-adic Groups:
at 4:30 in FordH B60
Thursday, 28 Apr 2005
- Dr. John H. Maddocks from Swiss Federal Institute of Technology Lausanne will speak on "Tutorial on basics of DNA"
- ... Will not meet this week
- Professor Gary Meyer from Computer Science will speak on "Image difference metrics and computer graphics"
- Professor Joel Tropp from University of Michigan will speak on "Title: to be announced"
- Professor Marino Arroyo from Polytechnic University of Catalunya will speak on "Continuum modelling of the mechanics of curved crystalline objects: applications to nanotubes"
- Professor Ionut Ciocan Fontanine will speak on "A generalization of Hori-Vafa formula - a continuation"
- ... Will not meet this week
- Professor Alain Chenciner from Universite Paris VII will speak on "Symmetries and “simple” solutions of the classical n-body problem"
-
Special Seminar:
at 10:10 in Lind Hall 409
-
Topology:
at 11:15 in VinH 313
-
Image Processing and Analysis Working:
at 11:15 in LindH 409
-
Applied Mathematics and Numerical Analysis:
at 11:15 in VinH 570
-
Materials seminar: Singularities Focus Group:
at 1:25 in Lind Hall 409
-
Differential Geometry and Symplectic Topology:
at 2:20 in VinH 301
-
Student Number Theory:
at 2:30 in VinH 203A
-
Colloquium:
at 3:30 in VinH 16
Friday, 29 Apr 2005
- Professor Peter Palffy-Muhoray from Kent State University will speak on "Negative index materials"
- Professor Qi Wang from Florida State University will speak on "Title: to be announced"
- Professor Howard Karloff from AT&T Labs will speak on "Optimization and approximation at AT&T labs and beyond"
- ... Problem session. Bring a problem, or listen to ours. Entire math community welcome
- ... Will not meet this week
- Professor Alex Woo from University of California-Berkeley will speak on "Which Schubert varieties are Gorenstein?"
- Professor Bert Fristedt will speak on "`Building uniformly random subtrees', a paper by Malwina Luczak and Peter Winkler"
- Professor Alain Chenciner from Universite Paris VII will speak on "Unchained polygons in the equal-mass n-body problem"
- ... Title and speaker to be announced
-
Special Lecture:
at 10:10 in LindH 409
-
Materials seminar: Singularities Focus Group:
at 11:15 in Lind Hall 409
-
Industrial Problems Seminar:
at 1:25 in VinH 570
-
Student Combinatorics:
at 2:30 in VinH 203B
-
Working Seminar on Ricci Flow:
at 3:35 in VinH 213
-
Combinatorics:
at 3:35 in VinH 20
-
Probability:
at 3:35 in VinH 206
-
Special Dynamical Systems Seminar:
at 3:35 in VinH 570
-
Automorphic Forms and Number Theory:
at 4:40 in VinH 364
Professor Alain Chenciner, University Paris VII, will visit the Mathematics department April 23 - May 6, 2005. His visit is made possible by the Ordway Endowment. During his visit Professor Chenciner's visit will be Vincent Hall 239; you can reachhim by phone at 624- 4813.
