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Langlands duality on the Beilinson-Drinfeld Grassmannian (2310.19734v2)
Published 30 Oct 2023 in math.RT and math.AG
Abstract: We calculate various categories of equivariant sheaves on the Beilinson-Drinfeld Grassmannian in Langlands dual terms. For one, we obtain the factorizable derived geometric Satake theorem. More generally, we calculate the categorical analogue of unramified vectors in the Jacquet module of sheaves on the Grassmannian. In all cases, our spectral categories involve factorization modules for factorization algebras related to the Langlands dual group.
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