Events for 04/02/2018 from all calendars

Probability Seminar

Time: 2:00PM - 3:00PM

Location: BLOC 220

Speaker: Eliran Subag, Courant Institute NYU

Title: The geometry of pure states in spherical spin glasses

Abstract: Following Parisi's celebrated replica symmetry breaking solution for mean-field spin glasses (1980), physicists invested considerable efforts to interpret it in terms of `physical' properties of the system. One of the central ideas in their theory was that the system decomposes into `pure states', organized in an ultrametric structure. In his seminal work Talagrand (2010) proved for a wide class of models the existence of such a decomposition -- a sequence of subsets on which the Gibbs measure asymptotically concentrates. Panchenko (2013) established the famous ultrametricity conjecture, which implies, in particular, that those subsets are organized in a certain hierarchical structure. In the context of the spherical models, I will describe a new geometric picture for the above, in which the hierarchy is expressed through a tree of nested spherical bands. In particular, the pure states concentrate on bands corresponding to the leaves of this tree.

Working Seminar in Groups, Dynamics, and Operator Algebras

Time: 3:00PM - 3:50PM

Location: BLOC 506A

Speaker: Xin Ma, Texas A&M University

Title: Groups acting on trees II

Geometry Seminar

Time: 3:00PM - 4:00PM

Location: BLOC 628

Speaker: Gregory Pearlstein, Texas A&M

Title: Hodge theory, Gromov-Witten theory and representation theory

Abstract: In advance of the Texas Algebraic Geometry Symposium, this talk will introduce hyperkahler manifolds, Gromov-Witten theory and certain aspects of infinite dimensional representation theory in terms of Hodge theory.

Industrial and Applied Math

Time: 4:00PM - 5:00PM

Location: BLOC 220

Speaker: William Pack, Raytheon

Title: Industrial Applied Mathematics

Abstract: This talk will focus on the speaker's experiences as a mathematician in the Aerospace/Defense Industry, where he has worked for over 16 years in the areas of engineering analysis, algorithm development, mathematical modeling & simulation, and image processing.

Student/Postdoc Working Geometry Seminar

Time: 5:00PM - 6:00PM

Location: BLOC 628

Speaker: K. Bari, TAMU

Title: The hay in a haystack problem