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Categorical local Langlands on isocrystals

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Arnaud Eteve
Fre, 21/06/2024 - 14:05 - 16:00
MPIM Lecture Hall

(jt with D. Gaistgory, A. Genestier and V. Lafforgue) Let F be a local field of equal characteristic and G be a reductive group over F. The conjectural categorical form of the local Langlands correspondence proposed by Fargues and Scholze is an equivalence of categories between on one side the category of $\ell$-adic sheaves on $\Bun_G(X_{FF})$ the stack of $G$-torsors on the Fargues-Fontaine curve and and on the other side the category of coherent sheaves on the stack of $L$-parameters. The main result of their work is the construction of a categorical action of the second category on the first one. In this talk, I want to report on an ongoing project whose goal is to construct a similar categorical action on the category of $\ell$-adic sheaves on the category of $G$-isocrystals. In a second part of the talk I will report on a joint work with C. Xue, where we show some property of the cohomology of global chtoucas and how to interpret this property as a strong form of local-global compatibility.

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