The affine Grassmannian as a presheaf quotient

Abstract: The affine Grassmannian of a reductive group $G$ is usually defined as the étale sheafification of the quotient of the loop group $LG$ by the positive loop subgroup. I will discuss various triviality results for $G$-torsors which imply that this sheafification is often not necessary.

algebraic geometrynumber theory

Audience: researchers in the topic

MIT number theory seminar

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