Introductory workshop on the representation theory of finite groups  11 - 15 July 2016

Room : BI A0 448


Radha Kessar, City University London

Gunter Malle, TU Kaiserslautern

Donna Testerman, EPFL

The workshop will consist of three lecture series of 4-5 hours each.

Burkhard Külshammer, Friedrich Schiller Universität Jena
Basic local representation theory
We will introduce some of the main concepts in local representation theory of finite groups: Brauer characters, decomposition numbers, Cartan invariants, lifting of idempotents, blocks, defect groups, heights and defects of characters. Trivial source modules and the Brauer homomorphism will be presented, and Brauer's three main theorems in block theory will be stated. If time permits, some of the main open problems in block theory will also be addressed, such as Donovan's Conjecture, and some of the recent progress on this conjecture will be mentioned.

Markus Linckelmann, City University London
Block theory and fusion systems
The course will develop the block theoretic background material required to recast the most prominent conjectures in block theory in terms  of statements relating the algebra structure of a block of a finite group to the fusion system of the block. We will review the classic theory of Brauer pairs due to Alperin and Broue, leading to Puig's notion of fusion systems associated with a block. We will relate this to another block theoretic key concept, the notion of a source algebra of a block, and describe in what way source algebras are an indispensable tool in block theory.

Meinolf Geck, Universität Stuttgart
The representation theory of finite reductive groups
The lectures  will  give an introduction to Lusztig's theory, where methods from algebraic geometry are used to determine the irreducible characters of finite reductive groups. This will include a discussion of characters of groups with a non-connected center and, if time permits, also disconnected groups.
Name University Dates of visit
Radha Kessar City University London 11/07/2016 - 15/07/2016
Gunter Malle TU Kaiserslautern 11/07/2016 - 15/07/2016
Donna Testerman EPFL 11/07/2016 - 15/07/2016
Total Guests : 3
Name University Dates of visit
Total Guests : 0