# Events for 10/15/2019 from all calendars

## Student Working Seminar in Algebra and Geometry

**Time:** 4:00PM - 5:00PM

**Location:** BLOC 628

**Speaker:** Pablo S. Ocal, Texas A&M University

**Title:** *Lang's Algebra; Chapter XV, Sections 5-8*

## Analysis/PDE Reading Seminar

**Time:** 4:00PM - 5:00PM

**Location:** BLOC624

**Speaker:** Gregory Berkolaiko, Texas A&M University

**Title:** *Self-adjoint extensions via boundary triples*

**Abstract:** To better understand self-adjoint extensions of symmetric operators via boundary triples (and associated topics such as Krein resolvent formula), we will consider how this theory works for matrices. The analog of a symmetric operator is a rectangular matrix. Because its domain isn't dense, its adjoint is not a matrix but must be interpreted as a linear relation. With this understanding, the rest of the theory follows. Some interesting links emerge, for example the Dirichlet-to-Neumann map is a Schur complement in the matrix case.

## Student Working Seminar in Category Theory

**Time:** 5:00PM - 6:00PM

**Location:** BLOC 506A

**Speaker:** Zheng Kuang, Texas A&M University

**Title:** *Riehl Ch1~Ch2.1*

**Abstract:** This is review seminar for the basic category theory. We will deal with the notion of category, functor, categorical equivalence, natural transformation, diagram, 2-categories, and representable functors.