Skip to main content.University of Minnesota. Home page. Institute of Technology     One Stop   Directories   Search U of M 

Seminars
Previously Posted Seminars
Other UMN Seminars
Meeting Rooms
Schedules and reservations for...
  • VinH 203a
  • VinH 570

Recent Seminar Series
Automorphic Forms and Number Theory
Climate Change
Colloquium
Combinatorics
Differential Geometry and Symplectic Topology
Financial Mathematics
IMA Postdoc Seminar
Industrial Problems Seminar
Jr. Colloquium
Lie Theory
Math Physics Seminar
Ordway Lectures
PDE
Probability
Student Combinatorics
Student Number Theory
Student Topology
Topology

Seminars for the week of November 26, 2007

Colloquium

Thursday, 3:20, in VinH 16

Professor Dan Barbasch
of Cornell University
will speak on
"Unipotent Representations and Unitarity"

A representation $\pi :G\to Aut(V)$ of a group $G$ is called unitary if $V$ has a positive hermitian form such that $G$ acts by unitary operators, i.e. $<\pi (g)v,\ \pi (g)w> = $ for $g\in G$, $v,w\in V$. An important problem in representation theory, which has applications in analysis, mathematical physics and number theory is the classification of the unitary irreducible representations of a reductive group. There are operations, unitary induction, derived functor construction and complementary series which take representations of a Levi component $M$ of $G$ to representations of $G$, and which preserve unitarity. The first steps then to determine which unitary representations of $G$ are {\bf basic}, i.e. they do not arise by the above operations from unitary representations of proper Levi components. {\bf Unipotent} representations are irreducible representations of $G$ which have properties closely connected to nilpotent orbits in the Lie algebra. Basic representations are conjectured to be unipotent. In this talk I will review some constructions and properties of unipotent representations, and describe their role in the classification of unitary representations.

Monday, 26 Nov 2007

Working Seminar on Partial Differential Equations: at 2:30 in VinH 570
... Will not meet this week
Differential Geometry/Symplectic Topology: at 2:30 in VinH 209
... Will not meet this week
Dynamical Systems Seminar: at 3:35 in VinH 570
... Will not meet this week
Topology Seminar: at 3:35 in VinH 364
Professor Alexander Voronov will speak on "The n-category of cobordisms and TQFTs, II"
Fabes Seminar: at 4:40 in VinH 570
... Will not meet this week

Tuesday, 27 Nov 2007

IMA Postdoc Seminar: at 11:15 in LindH 409
Victor Barocas from IMA will speak on "Multiscale mecahnical modeling of bioartificial tissues"
Commutative Algebra Seminar: at 11:15 in VinH 203A
... Will not meet this week
Jr. Financial Mathematics: at 2:30 in VinH 570
Professor Scot Adams will speak on "The ABCDEFs of Financial Mathematics. We'll cover material from the online lecture series"
Jr. Colloquium: at 3:20 in VinH 16
Matthew Dobson will speak on "An introduction to the quasicontinuum method"
Combinatorics: at 4:30 in VinH 570
Professor Ivan Izmestiev from TU, Berlin will speak on "Links with high hull number"

Wednesday, 28 Nov 2007

The Mathematics of Climate Change: at 11:15 in VinH 570
Esther Widiasih will speak on "Stability of the global ocean circulation: Basic bifurcation diagrams, by Dijkstra and Weijer"
Mathematics of Molecular and Cellular Biology: at 11:15 in LindH 409
Professor Debra Knisley from East Tennessee State University will speak on "Graphical invariants and topological indices as biomolecular descriptors"
PDE: at 3:35 in VinH 570
Professor Professor Zhiwu Lin from University of Missouri-Columbia will speak on "Unstable surface water waves"

Thursday, 29 Nov 2007

Applied Mathematics: at 11:15 in VinH 570
... Will not meet this week
Math Club Seminar: at 12:10 in VinH 120
... Will not meet this week
Colloquium: at 3:20 in VinH 16
Professor Dan Barbasch from Cornell University will speak on "Unipotent Representations and Unitarity"

Friday, 30 Nov 2007

Lie Theory Seminar: at 11:15 in VinH 301
... Will not meet this week
Student Combinatorics: at 12:20 in VinH 570
... Will not meet this week
Student Automorphic Forms: at 1:25 in VinH 313
Ben Rosenfield will speak on "Unramified principal series"
Algebraic Representation Theory: at 1:25 in VinH 203A
Professor Peter Webb will speak on "Tilting theory"
Industrial Problems Seminar: at 1:25 in VinH 570
Balaji Gopalakrishnan from SAS Institute Inc. will speak on "Marketing optimization"
Probability Seminar: at 2:30 in VinH 213
Professor Ofer Zeitouni will speak on "Search for evidence in a maze"
Computational Biology Seminar: at 3:35 in EE/CS 3-180
... Will not meet this week
Automorphic Forms and Number Theory: at 3:35 in VinH 364
... Will not meet this week
Practitioners' Financial Mathematics Seminar: at 5:30 in VinH 570
Hunt Blatz from Allianz Life, USA will speak on "What not to say in a job interview, and stuff like that"

Institute of Technology

math.umn.edu/~seminar/2007_November_26.html
Last Modified November 27, 2007
Contact the School of Mathematics
The University of Minnesota is an equal opportunity educator and employer.
© 2012, The Regents of the University of Minnesota
  Enter keyword search