Skip to content
# Events for 10/29/2019 from all calendars

## Postdoc Lunch Time Talks

## Postdoc Lunch Time Talks

## Postdoc Lunch Time Talks

## Student Working Seminar in Algebra and Geometry

## Student Working Seminar in Category Theory

**Time: ** 12:55PM - 1:15PM

**Location: ** BLOC 220

**Speaker: **Hao Guo, Texas A&M University

**Description: **

Title: Coarse geometry and quantizationAbstract:I will give an overview of some recent joint work with Peter Hochs and Mathai Varghese at the University of Adelaide on the formulation of a spin-c quantization map in the language of coarse geometry. The quantization map we define is a maximal equivariant analogue of the localized index map of John Roe. The advantage of working in the maximal setting is that it allows one to compose the quantization map with the reduction map of Mathai-Zhang. As a consequence, I will state a version of Guillemin and Sternberg’s quantization commutes with reduction principle for equivariant spin-c Callias-type operators.

**Time: ** 1:20PM - 1:40PM

**Location: ** BLOC 220

**Speaker: **Hang Huang, Texas A&M University

**Description: **

Title: Equations and Syzygies of Projective Variety Defined by ParametrizationsAbstract:In real life, a lot of varieties we are interested in are given by explicit parametrizations. In many cases, it is very useful, although very difficult, to compute the equations and syzygies of these varieties explicitly. I will discuss some examples that this could be done and indicate a powerful but limited technique of how to compute them.

**Time: ** 1:45PM - 2:05PM

**Location: ** BLOC 220

**Speaker: **Jianchao Wu, Texas A&M University

**Description: **

Title: Crossed product C*-algebras, K-theory, and applicationsAbstract:I will outline the construction of crossed product C*-algebras and indicate how the study of their analytical properties and K-theory is relevant in dynamics, topology, geometry, and mathematical physics.

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

**Location: ** BLOC 628

**Speaker: **Arpan Pal, Texas A&M University

**Title: ***Lang's Algebra; Chapter XV, Sections 9-11*

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

**Location: ** BLOC 506A

**Speaker: **Byeongsu Yu

**Title: ***Universal property and Category of element. (Riehl 2.3~2.4)*

**Abstract: **We will show that the universal property, which is called an abstract nonsence, stems from the initial element of special category named the category of element. The category of element is a special case of comma category. Then, the universal object of the category element gives the universal property of some specific construction.