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Decomposition matrices for quasi-isolated blocks of exceptional groups

Presented by: 
Niamh Farrell
Date: 
Tuesday 10th March 2020 - 11:00 to 12:00
Venue: 
INI Seminar Room 2
Abstract: 
Decomposition numbers encapsulate the relationship between ordinary and modular representations of finite groups. Determining decomposition matrices is a difficult problem, particularly for the finite groups of Lie type in non-defining characteristic. I will present some recent developments which allow us to consider tackling this problem for the quasi-isolated blocks of finite groups of Lie type in non-defining characteristic, and discuss some of the strategies and challenges involved in this project.




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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons