

Mathematics Seminars for the week of September 29, 2003
Colloquium
Thursday, 3:30, in VinH 16Professor Dennis Stanton
will speak on
"Roots of unity in enumeration"
Let $X$ be a finite set. Suppose that each x in X corresponds to a
monomial $q^{c(x)}$. The generating function X(q) for X is the sum of all of
these monomials, and is a polynomial in q. Clearly X(1)=|X|, but there are
important examples in which X(-1) is the size of a specified set related to X.
In this talk, I will give a generalization of this phenomena to roots of unity
W, where X(w) counts the number of fixed points of a cyclic group. An
equivalent representation theory reformulation is given. Examples of the
phenomenon will be given for interger partitions, Coxeter groups, and finite
fields. One example leads to a hypothesized Bruhat-like cell decomposition in
finite fields. This is joint work with Vic Reiner, Peter Webb, and Dennis
White.
Monday, 29 Sep 2003
Commutative Algebra/Algebraic Geometry:
at 3:30 in VinH 301
-
Professor Bumsig Kim
from Korean Institute for Advanced Studies
will speak on "Towards mirror symmetry for non-abelian quotients"
Dynamical Systems Seminar:
at 3:35 in VinH 570
-
Professor Jens Rademacher
will speak on "Tracefiring of pulses I: Phenomena and numerics"
Topology:
at 3:35 in VinH 206
-
Professor Jean Lannes
from Ecole Polytechnique - Ordway Visitor
will speak on "Sturm sequences, Maslov index and Bott periodicity - a
continuation"
Real Analysis [Gene Fabes 1937--1997]:
at 4:35 in VinH 311
-
... Will not meet this week
Tuesday, 30 Sep 2003
IMA Postdoc Seminar:
at 11:15 in LinH 409
-
... Will not meet this week. The IMA will host a workshop this week on
Statistical Methods for Gene Expression
Combinatorics Problem Session:
at 11:15 in VinH 203B
-
... Bring your own problems, or listen to ours. Entire math community
(undergrad, grad, faculty) welcome
Number Theory:
at 1:25 in ME 221
-
Professor Guy Henniart
from Universite de Paris-Sud
will speak on "Local Langlands correspondence for $GL_n$ and higher L-
functions"
Jr. Colloquium:
at 3:35 in VinH 16
-
Mr. Dan Drake
will speak on "Dirty children, unfaithful husbands, and numbers on your
forehead"
... Because there is an overlap between a meeting for students
interested in math graduate school and this colloquium, this talk has been
postponed until next week.
Wednesday, 1 Oct 2003
P.D.E.:
at 3:35 in VinH 206
-
Professor Chris Cosner
from University of Miami
will speak on "Title: to be announced"
Thursday, 2 Oct 2003
Student Topology:
at 9:05a.m. in VinH 203B
-
Mr. Javier Zuniga
will speak on "The nerve of fat cats"
Applied Mathematics and Numerical Analysis:
at 11:15 in VinH 570
-
Professor Lea Popovic
from IMA
will speak on "A stochastic model for macroevolution"
Lie Theory:
at 1:25 in ME 221
-
Professor Guy Henniart
from Universite de Paris-Sud
will speak on "Local Langlands correspondence for $GL_n$ and higher L-
functions"
Differential Geometry:
at 2:20 in VinH 313
-
Professor Heayong Shin
from Chung-Ang University
will speak on "Singularities of a minimizing harmonic map in low dimensions"
Colloquium:
at 3:35 in VinH 16
-
Professor Dennis Stanton
will speak on "Roots of unity in enumeration"
Friday, 3 Oct 2003
Industrial Problems Seminar:
at 1:25 in VinH 570
-
... Will not meet this week
Probability:
at 2:30 in VinH 207
-
Ms. Karen Ball
will speak on "Factors of processes on graphs with nonamenable group actions"
Combinatorics:
at 3:35 in VinH 207
-
Professor Julian Araoz
from Univ. Politec. de Catalunya - Spain
will speak on "Title: to be announced"
Automorphic Forms and L-Functions:
at 3:35 in VinH 364
-
... Will not meet this week
Professor Jean Lannes, Ecole Polytechnique, is currently visiting
the Mathematics Department for one month beginning September 15. His visit is
made possible by the Ordway Endowment. During his visit, Professor Lannes's
office is Vincent Hall 239; you can reach him by phone at 624-
4813.\hfill\break\vskip .2cm\noindent Professor Bumsig Kim from the Pohang
University of Science and Technology will visit the department September 20-
October 2, 2003. HIs visit is partially sponsored by the Visitors Program.
During his visit Professor Kim's office will be Vincent Hall 331; you can
reach him by phone at 625-0172.\hfill\break\vskip .2cm\noindent
Professor Guy Henniart, University of Paris-Sud, will visit the School of
Mathematics for one month beginning September 29. His visit is made possible
through the Ordway Endowment. During his visit, Professor Henniart's office
will be Vincent Hall 512; you can reach him by phone at 626-9137.
www@math.umn.edu
Updated Wed Oct 1 03:00:01 CDT 2003
URL http://www.math.umn.edu/~seminar
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