SMS scnews item created by Alex Sherman at Mon 19 Feb 2024 1220
Type: Seminar
Distribution: World
Expiry: 29 Apr 2024
Calendar1: 23 Feb 2024 1200-1300
CalLoc1: Carslaw 175
CalTitle1: Algebra Seminar: Schurian-infinite blocks of type A Hecke algebras
Auth: (ashe8718) in SMS-SAML

Algebra Seminar: Speyer -- Schurian-infinite blocks of type A Hecke algebras

Liron Speyer (OIST) is speaking in the Algebra Seminar this week.  We will go out for
lunch after the talk.  

When: Friday 23 February, 12-1pm 

Where: Carslaw 175 

Title: Schurian-infinite blocks of type A Hecke algebras 

Abstract: For any algebra A over an algebraically closed field F, we say that an
A-module M is Schurian if End_A(M) is isomorphic to F.  We say that A is Schurian-finite
if there are only finitely many isomorphism classes of Schurian A-modules, and
Schurian-infinite otherwise.  I will present joint work with Susumu Ariki and Sinead
Lyle in which we classified the Schurian-finiteness of blocks of type A Hecke algebras -
when e is not 2, a block of the Hecke algebra is Schurian-finite if and only if it has
finite representation type, if and only it has weight 0 or 1.  I will give an overview
of the techniques that were used in this project.

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