$p$-adic sheaves on classifying stacks, and the $p$-adic Jacquet-Langlands correspondence

David Hansen; Lucas Mann

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arXiv · 2207.04073

$p$-adic sheaves on classifying stacks, and the $p$-adic Jacquet-Langlands correspondence

David Hansen·Lucas Mann

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Abstract

We establish several new properties of the $p$-adic Jacquet-Langlands functor defined by Scholze in terms of the cohomology of the Lubin-Tate tower. In particular, we reprove Scholze's basic finiteness theorems, prove a duality theorem, and show a kind of partial K\"unneth formula. Using these results, we deduce bounds on Gelfand-Kirillov dimension, together with some new vanishing and nonvanishing results. Our key new tool is the six functor formalism with solid almost $\mathcal{O}^+/p$-coefficients developed recently by the second author [Man22]. One major point of this paper is to extend the domain of validity of the $!$-functor formalism developed in [Man22] to allow certain "stacky" maps. In the language of this extended formalism, we show that if $G$ is a $p$-adic Lie group, the structure map of the classifying small v-stack $B\underline{G}$ is $p$-cohomologically smooth.

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David Hansen, Lucas Mann. 2022-07-08. $p$-adic sheaves on classifying stacks, and the $p$-adic Jacquet-Langlands correspondence. https://arxiv.org/abs/2207.04073

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