# Events for 03/23/2018 from all calendars

## Newton-Okounkov Bodies

**Time:** 1:00PM - 2:00PM

**Location:** BLOC 624

**Speaker:** Frank Sottile, Texas A&M University

**Title:** *Newton-Okounkov bodies: definition and first properties*

## Algebra and Combinatorics Seminar

**Time:** 3:00PM - 3:00PM

**Location:** BLOC 628

**Speaker:** Dimitar Grantcharov, UT Arlington

**Title:** *Singular Gelfand-Tsetlin Modules and BGG Differential Operators*

**Abstract:** Every irreducible finite-dimensional module of the general linear Lie algebra gl(n) can be described with the aid of the classical Gelfand-Tsetlin formulas. The same formulas can be used to define a gl(n)-module structure on some infinite-dimensional modules - the so-called generic (nonsingular) Gelfand-Tsetlin modules. In this talk we will introduce Gelfand-Tsetlin modules and discuss recent progress on the study of singular Gelfand-Tsetlin gl(n)-modules and relations with BGG differential operators. The talk is based on a joint work with V. Futorny, L. E. Ramirez, and P. Zadunaisky.