Seminars and Colloquiums
for week of October 3, 2011
Speaker:
Ms. Ellie Abernethy, Monday
Dr. Andreas Prohl, University of Tuebingen, Germany, Monday
Professor Jie Xiong, Monday
Ms. Parisa Fatheddin, Wednesday
Dr. Jerzy Dydak, Wednesday
Dr. Joan Lind, Wednesday
Mr. Fei Xing, Thursday
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. Judy Day.
Monday, October 3, 2011
Algebra Seminar
TIME: 2:30 – 3:20
ROOM: Ayres Hall B004
SPEAKER: Ms. Ellie Abernethy
TITLE: An introduction to K_0(R)
ABSTRACT: This will be the first in a series of talks on the Grothendieck group K_0(R) defined using the category of finitely generated projective R-modules. The talks will be self-contained and start out with a review of projective modules.
DE and Applied/Computational Math Seminar
TIME: 3:35 – 4:25pm
ROOM: Ayres 113
SPEAKER: Dr. Andreas Prohl, University of Tuebingen, Germany
TITLE: Numerical analysis of the stochastic incompressible Navier-Stokes equations
ABSTRACT: I will discuss implementable space-time discretizations of the stochastic incompressible Navier-Stokes equations. In 3D, martingale solutions are constructed by a discretization that is based on the implicit Euler method, and LBB-stable finite elements. The convergence proof rests on a discrete energy law, and uniform control of higher moments of increments of approximates. In 2D, strong solutions with improved regularity properties are approximated with certain rates by means of new time-splitting schemes which properly address the interplay of general noise and pressure; general LBB-stable finite elements lead to suboptimal convergence behavior for the same reason, which favors exactly divergence free finite elements instead. This is joint work with Z. Brzezniak (U York) and E. Carelli (U Tuebingen).
Probability Seminar
TIME: 3:35 – 4:25pm
ROOM: Ayres 122
SPEAKER: Professor Jie Xiong
TITLE: Uniqueness problems for some measure-valued processes (II)
ABSTRACT: A stochastic partial differential equation (SPDE) is derived for the super Brownian motion regarded as a distribution function valued process. The strong uniqueness for the solution to this SPDE is obtained by a connection between SPDEs and backward doubly stochastic differential equations. Similar results are also proved for the Fleming-Viot process. We will also consider processes with interaction.
Wednesday, October 5, 2011
Oral Specialty Exam
TIME: 11:00 am
ROOM: Ayres 114
SPEAKER: Ms. Parisa Fatheddin
Her committee consist of Professors: Xiong (chair), Chen, and Maroulas.
Analysis Topology Seminar
TIME: 2:30 – 3:20pm
ROOM: Ayres Hall 114
SPEAKER: Dr. Jerzy Dydak
TITLE: Partitions of unity in coarse geometry
ABSTRACT: I will outline how to use partitions of unity to explain amenability via Folner sequences, Property A (coarse amenability) of G.Yu, and asymptotic dimension of Gromov.
Analysis Seminar
TIME: 3:35 – 4:25
ROOM: Ayres 113
SPEAKER: Dr. Joan Lind
TITLE: Random maps and the Angel-Schramm limit (continued)
ABSTRACT How can one create a 2-dimensional random surface? One approach is to take some kind of limit of random graphs embedded in the plane. I will give a general introduction to this area and will discuss the limiting object of Angel and Schramm, which is called the Uniform Infinite Planar Triangulation (UIPT).
Thursday, October 6, 2011
Math Biology Seminar
TIME: 12:45 – 1:35
ROOM: NIMBioS Classroom
SPEAKER: Mr. Fei Xing
TITLE: The Dynamics of Animal Grouping
Past notices:
Seminars from 2010-2011 academic year
Seminars from 2009-2010 academic year
Seminars from 2008-2009 academic year
Seminars from 2007-2008 academic year
Seminars from 2006-2007 academic year