Seminars and Colloquiums
for the week of November 16, 2009
Speaker:
Mr. Andreas Aristotelous, Monday
Professor Xia Chen, Monday
Mr. Nick Gewecke, Tuesday
Professor Stefan Richter, Wednesday
Professor Michael Jablonski, University of Oklahoma, Wednesday
Mr. Ryan Clark, Friday
Professor Michael Jablonski, University of Oklahoma, Friday
Monday, November 16
COMPUTATIONAL AND APPLIED MATH SEMINAR
TIME: 3:35 p.m.
ROOM: HBB 112
SPEAKER: Mr. Andreas Aristotelous
TITLE: “The Partition of Unity Method”
ABSTRACT: A new finite element method is presented that features the ability to include in the finite element space knowledge about the partial differential equation being solved and allows easy construction of finite element spaces of any desired regularity. A convergence proof is presented and examples are included. This talk is based on a paper by Babuska and J.M. Melenk, 1995.
PROBABILITY SEMINAR
TIME: 3:35 – 4:25 p.m.
ROOM: HBB 132
SPEAKER: Professor Xia Chen
TITLE: “Riesz potentials of Brownian intersection measures and their roles in modeling random polymers.
ABSTRACT: The Riesz potentials of Brownian intersection measures have been studied by Donsker and Varadhan for their role in “polaron problems” originated in electrostatics. In this talk, I will link the Riesz potentials to the model of random polymers, give answer to some basic problems regarding to this model, and raise more problems.
Tuesday, November 17
MATH ECOLOGY SEMINAR
TIME: 9:00 – 9:50 a.m.
ROOM: NIMBioS small conference room
SPEAKER: Mr. Nick Gewecke
TITLE: “Strategies for Controlling Wildfire”
Wednesday, November 18
ANALYSIS SEMINAR
TIME: 3:35 – 4:30 p.m.
ROOM: AC 113
SPEAKER: Professor Stefan Richter
TITLE: “Two-isometric operators and operator tuples on Hilbert spaces IV”
GEOMETRIC ANALYSIS SEMINAR
TIME: 4:30 – 5:30 p.m.
ROOM: HBB 102
SPEAKER: Professor Michael Jablonski
TITLE: "Ricci solitons on nilpotent Lie groups"
ABSTRACT: In this talk, we will consider Ricci soliton metrics on nilpotent Lie groups. We relate the problem of finding Ricci soliton metrics on nilpotent Lie groups to a question in geometric invariant theory (GIT). Applying techniques from GIT we show that soliton metrics on a given nilpotent Lie group are unique up to isometry and scaling (when they exist), prove that generic two-step nilpotent Lie groups admit such a metric, and explicitly construct examples of nilpotent Lie groups that cannot admit soliton metrics.
Friday, November 20
TOPOLOGY SEMINAR
TIME: 11:15 – 12:05 p.m.
ROOM: JHB 12
SPEAKER: Mr. Ryan Clark
TITLE: TBA
MATHEMATICS COLLOQUIUM
TIME: 3:35 – 4:35 p.m.
ROOM: HBB 102
SPEAKER: Professor Michael Jablonski, University of Oklahoma
TITLE: “Stability of real reductive group actions”
ABSTRACT: The action of a reductive Lie group G on a finite dimensional vector space is called stable if there exists a Zariski open set O such that the orbit G(v) is closed for all v in O. We are interested in local criteria that determine when a representation is stable, and more precisely when a specific orbit is closed. In this talk we present a real version of a criterion of Mumford which was developed to determine stability of complex representations of complex reductive groups. This new version over the reals has some unique properties that do not appear in the complex category. This work is joint with P. Eberlein.
Refreshments at 3:15 in the Aconda Court basement.
If you are interested in giving or arranging a talk for one of our seminars or colloquiums, please review our calendar.
If you have questions, or a date you would like to confirm, please contact Dr. Steve Wise.
Week of:
Past notices:
Seminars from 2008-2009 academic year
Seminars from 2007-2008 academic year
Seminars from 2006-2007 academic year