The main purpose of this talk is to explain how the theory of torsors can be used to study problems in infinite dimensional Lie theory. I will not assume that the audience is familiar with torsors. Definitions and examples will be given. The main application in this case is to provide a general framework (relative sheaves of Lie algebras) that explains/justifies a known result about the derivations of multiloop algebras.
This video was produced by the Universidade de São Paulo, as part of the LieJor Online Seminar: Algebras, Representations, and Applications.
