1 – 3 April 2019 University of Bristol

We are pleased to announce we will be hosting two Distinguished Lecture Series in 2019, the first of which will be given by Geordie Williamson.

The talks will be held over three days:

Monday 1st April 16:00 (Colloquium) 1.15 Queens building followed by a wine reception in Pugsley foyer

Tuesday 2nd April, 16:00, SM2, Maths Building

Wednesday 3rd April, 16:00, SM2, Maths Building

Please register for the colloquium here.

Registration not required for the talks of the 2nd and 3rd April.

Colloquium Title and Abstract:

**Title:** Semi-simplicity in representation theory

**Abstract:** Representation theory is the study of linear symmetry. Since the first papers on the representation theory of finite groups by Frobenius at the end of the 19th century, the theory has grown to form a fundamental tool of modern pure mathematics, with applications ranging from the standard model in particle physics to the Langlands program in number theory. Some of the most important theorems in representation theory assert some form of semi-simplicity. Examples include Maschke’s theorem on representations of finite groups over the complex numbers (proved in 1897), Weyl’s theorem on representations of compact Lie groups (proved in 1930), and the Kazhdan-Lusztig conjecture (proved by Beilinson-Bernstein and Brylinski-Kashiwara in 1980). The lectures will provide an introduction to these ideas, with an emphasis on our attempts to uncover further layers of hidden semi-simplicity.

Support for travel for UK based PhD students may be available, please contact heilbronn-coordinator@bristol.ac.uk with any requests by 18th March.

We are pleased to announce that we are able to consider applications for funding to support care costs*

This event is organised in collaboration with the Heilbronn Institute of Mathematical Research.

*Applies to expenses incurred exceptionally as a result of attending the lecture series. Please contact heilbronn-coordinator@bristol.ac.uk for further information.

Slides from the talks are available below:

For slides on talk 1 please see here.

For slides on talk 2 please see here.