Fargues–Scholze's categorical local Langlands conjecture

Let FF be a local field, let GG be a quasisplit reductive group over FF, and let BB be a Borel subgroup with unipotent radical NN. Choose a generic continuous character ψv:N(Fv)\ra\La×\psi_v:N(F_v)\ra\La^\times, and let \LS\prescriptLG,Fv\LS_{\prescript{L}{}{G},F_v} be the moduli of continuous \prescriptLG\prescript{L}{}{G}-valued representations of WFvW_{F_v}. Let cψvc_{\psi_v} be the right adjoint to the colimit-preserving functor obtained from the spectral action on i1,! ⁣\cIndN(Fv)G(Fv)ψvi_{1,!}\!\cInd_{N(F_v)}^{G(F_v)}\psi_v. Write D(\BunG,Fv,\La)\omD(\Bun_{G,F_v},\La)^\om for the compact objects and D\cohqc(\LS\prescriptLG,Fv)\NilpD_{\coh}^{\operatorname{qc}}(\LS_{\prescript{L}{}{G},F_v})_{\Nilp} for coherent sheaves with nilpotent singular support. Fargues–Scholze's categorical local Langlands conjecture. The functor cψvc_{\psi_v} restricts to an equivalence

D(\BunG,Fv,\La)\om\raD\cohqc(\LS\prescriptLG,Fv)\Nilp.D(\Bun_{G,F_v},\La)^\om\ra^\sim D_{\coh}^{\operatorname{qc}}(\LS_{\prescript{L}{}{G},F_v})_{\Nilp}.

Consequently, applying \Ind\Ind yields an equivalence

\bLψv:D(\BunG,Fv,\La)\ra\IndD\cohqc(\LS\prescriptLG,Fv)\Nilp.\bL_{\psi_v}:D(\Bun_{G,F_v},\La)\ra^\sim\Ind D_{\coh}^{\operatorname{qc}}(\LS_{\prescript{L}{}{G},F_v})_{\Nilp}.

This is the categorical local Langlands conjecture of Fargues–Scholze. It is known when GG is a torus; the general quasisplit case remains open.

Sources & referencesView supporting material

Primary source

Siyan Daniel Li-Huerta, “Courbes et fibrés vectoriels en théorie de Hodge z-adique globale”, arXiv:2602.04978 (2026).

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