Difference between revisions of "Colloquia/Fall18"
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Revision as of 10:50, 19 August 2014
All colloquia are on Fridays at 4:00 pm in Van Vleck B239, unless otherwise indicated.
|September 12||Moon Duchin (Tufts University)||TBA||Dymarz and WIMAW|
|September 19||Greg Smith (Queen's University)||TBA||Erman|
|September 26||Jack Xin (UC Irvine)||TBA||Jin|
|October 3||Pham Huu Tiep (University of Arizona)||Adequate subgroups||Gurevich|
|October 10||Alejandro Adem (UBC)||TBA||Yang|
|October 17||Bao Chau Ngo (University of Chicago)||TBA||Gurevich|
|October 24||Almut Burchard (University of Toronto)||TBA||Stovall|
|October 31||Morris Hirsch (UC Berkeley and UW Madison)||Fixed points of Lie group actions||Stovall|
|November 7||Reserved for possible job interview|
|November 14||Reserved for possible job interview|
|November 21||Reserved for possible job interview|
|November 28||University holiday|
|December 5||Reserved for possible job interview|
|December 12||Reserved for possible job interview|
October 3: Pham Huu Tiep (Arizona)
The notion of adequate subgroups was introduced by Thorne. It is a weakening of the notion of big subgroups used in generalizations of the Taylor-Wiles method for proving the automorphy of certain Galois representations. Using this idea, Thorne was able to strengthen many automorphy lifting theorems. It was shown recently by Guralnick, Herzig, Taylor, and Thorne that if the degree is small compared to the characteristic then all absolutely irreducible representations are adequate. We will discuss extensions of this result obtained recently in joint work with R. M. Guralnick and F. Herzig. In particular, we show that almost all absolutely irreducible representations in characteristic p of degree less than p are adequate. We will also address a question of Serre about indecomposable modules in characteristic p of dimension less than 2p-2.