Seminar talk entitled 'Highest weight theory and wall-crossing functors for reduced enveloping algebras'

Activity: Academic and Industrial eventsGuest lecture or Invited talk


Abstract of talk:

In the last few years, major advances have been made in our understanding of the representation theory of reductive algebraic groups over algebraically closed fields of positive characteristic. Four key tools which are central to this progress are highest weight theory, reduction to the principal block, wall-crossing functors, and tilting modules. When considering instead the representation theory of the Lie algebras of these algebraic groups, more subtleties arise. If we look at those modules whose p-character is in so-called standard Levi form we are able to recover the four tools mentioned above, but they have been less well-studied in this setting. In this talk, we will explore the similarities and differences which arise when employing these tools for the Lie algebras rather than the algebraic groups. This research is funded by a research fellowship from the Royal Commission for the Exhibition of 1851.
Period3 Mar 2023
Held atUniversity of York
Degree of RecognitionRegional


  • algebraic groups
  • Lie algebras
  • representation theory