Zhu's unramified categorical local Langlands conjecture

From papers

Let uu be a closed point of UU, let \LS\prescriptLG,Fu\LS_{\prescript{L}{}{G},F_u} be the local Langlands parameter stack, and let \LS\prescriptLG,\cOu\LS_{\prescript{L}{}{G},\cO_u} denote its unramified locus. Let \bLψu\bL_{\psi_u} be the Fargues–Scholze functor, and let \cIndG(\cOu)G(Fu)\La\cInd_{G(\cO_u)}^{G(F_u)}\La be the unramified compact induction. Zhu's conjecture. Assume Fargues–Scholze's conjecture for uu. Then

\bLψu(i1,! ⁣\cIndG(\cOu)G(Fu)\La)\sO\LS\prescriptLG,\cOu.\bL_{\psi_u}(i_{1,!}\!\cInd_{G(\cO_u)}^{G(F_u)}\La)\cong\sO_{\LS_{\prescript{L}{}{G},\cO_u}}.

Moreover, there is a natural isomorphism of \bE1\bE_1-algebras over \La\La,

\EndG(Fu)(\cIndG(\cOu)G(Fu)\La)\EndD\coh(\LS\prescriptLG,Fu)(\sO\LS\prescriptLG,\cOu).\End_{G(F_u)}(\cInd_{G(\cO_u)}^{G(F_u)}\La)\cong\End_{D_{\coh}(\LS_{\prescript{L}{}{G},F_u})}(\sO_{\LS_{\prescript{L}{}{G},\cO_u}}).

The first assertion implies the second. The first is known when GG is a torus, while the second is known when \La\La equals LL; the conjecture in general remains open.

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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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