Title: Representation homology
Speaker: Ajay Ramadoss, Indiana University
Date: 26 July 2016
Time: 11:00 a.m.
Venue: LH-1, Department of Mathematics

The n-dimensional matrix representations of a group or an associative algebra A form a space (algebraic variety) Rep(A,n) called the n-th representation variety of A. This is a classical geometric invariant that plays a role in many areas of mathematics. The construction of Rep(A,n) is natural (functorial) in A, but it is not `exact’ in the sense of homological algebra. In this talk, we will explain how to refine Rep(A,n) by constructing a derived representation variety DRep(A,n), which is an example of a derived moduli space in algebraic geometry. For an application, we will look at the classical varieties of commuting matrices, and present a series of combinatorial conjectures extending the famous Macdonald conjectures in representation theory.

Contact: +91 (80) 2293 2711, +91 (80) 2293 2265
E-mail: chairman.math[at]iisc[dot]ac[dot]in