MenuEvents for 02/03/2015 from all calendars
Groups and Dynamics Seminar
Time: 11:30AM - 12:30PM
Location: BLOC 220
Speaker: Jean Bellissard, Georgia Institute of Technology
Title: Describing Aperiodic Media: C*-algebras and Noncommutative Geometry Approach
Abstract: Lecture 1, Mon, Delone sets and the Anderson-Putnam Complex Lecture 2, Tue, C*-algebras and Noncommutative Geometry Approach Lecture 3, Wed, Periodic Approximants, an spectral properties, the 1D-case Lecture 4, Thu, Feb 5, Prospect and discussions
Free Probability Seminar
Time: 1:00PM - 2:00PM
Location: BLOC 628
Speaker: Octavio Arizmendi Echegaray , CIMAT
Title: k-distance graphs of free product of graphs
Abstract: In this talk we will explain different products of graphs related to non-commutative notions of independence: cartesian, star, comb and free. We specialize to the free product and present a recent result in joint work with Tulio Gaxiola of the spectral distribution of the k-distance graphs of a free product of graphs.
Working Seminar in Geometry
Time: 1:00PM - 2:00PM
Location: BLOC 220
Speaker: Colleen Robles, TAMU
Title: Hypergeometric Functions 3
Abstract: Finish Chapter 2 (of Yoshida).
Nonlinear Partial Differential Equations
Time: 3:00PM - 4:00PM
Location: BLOC 628
Speaker: Jinkai Li, Weizmann Institute of Science
Title: Nonlinear Partial Differential Equations Seminar
Abstract:
Title: "Some results on the primitive equations with partial dissipation"
Abstract:
The primitive equations form a fundamental block in the models of oceanic and atmospheric dynamics. They are derived from the Navier-Stokes equations by applying the Boussinesq and hydrostatic approximations. Generally the viscosities and diffusion for the ocean and atmosphere are anisotropic, and in particular, one or several of them may vanish. In this talk, I will talk about the global well-posedness of strong solutions to the primitive equations with only partial dissipation. These are joint works with Chongsheng Cao and Edriss S. Titi.
Colloquium - Eviatar Procaccia
Time: 4:00PM - 5:00PM
Location: BLOC 220
Speaker: Eviatar Proaccia, University of California, LA
Description:
Title:Geometric homogeneity in disordered spatial processes.
Abstract:
Experimentalists observed that microscopically disordered systems exhibit homogeneous geometry on a macroscopic scale. In the last decades elegant tools were created to mathematically assert such phenomenon. The classical geometric results, such as asymptotic graph distance and isoperimetry of large sets, are restricted to i.i.d. Bernoulli percolation. There are many interesting models in statistical physics and probability theory, that exhibit long range correlation. In this talk I will survey the theory, and discuss a new result proving, for a general class of correlated percolation models, that a random walk on almost every configuration, scales diffusively to Brownian motion with non-degenerate diffusion matrix. As a corollary we obtain new results for the Gaussian free field, Random Interlacements and the vacant set of Random Interlacements. In the heart of the proof is a new isoperimetry result for correlated models.
