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Title:
Drinfeld's lemma for schemes

Speaker:
Kiran Kedlaya

Abstract:
In the course of constructing the Langlands correspondence for GL(2) over a function field, Drinfeld discovered a surprising fact about the interaction between étale fundamental groups and products of schemes in characteristic p. We state this result, describe a new approach to it involving a generalization to perfectoid spaces, and mention an application in p-adic Hodge theory (from joint work with Carter and Zabradi).

Link:
https://www.ias.edu/video/puias/2019/0204-KiranKedlaya