Langlands-Shahidi type categorical Langlands conjecture

Fix a quasi-split reductive group GG over a local field EE, and let WEW_E be its Weil group. Let Gˇ\check{G} be the Langlands dual group, and let ZLSt1(WE,Gˇ)/GˇZ^1_{\mathrm{LSt}}(W_E,\check{G})/\check{G} and ZwLSt1(WE,Gˇ)/GˇZ^1_{\mathrm{wLSt}}(W_E,\check{G})/\check{G} denote the stacks of Langlands-Shahidi type and weakly Langlands-Shahidi type parameters. Fix a Whittaker datum (U,ψ)(U,\psi) and let Wi1!c-indU(E)G(E)ψ\mathcal{W}\coloneqq i_{1!}\operatorname{c-ind}_{U(E)}^{G(E)}\psi. Langlands-Shahidi type categorical Langlands conjecture. There is an equivalence of categories

IndPerfqc(ZLSt1(WE,Gˇ)/Gˇ)DLSt(BunG)\operatorname*{Ind}\operatorname{Perf}^{\mathrm{qc}}(Z^1_{\mathrm{LSt}}(W_E,\check{G})/\check{G})\simeq\operatorname{\mathcal{D}}^{\mathrm{LSt}}(\operatorname{Bun}_G)

that maps the structure sheaf O\mathcal{O} to WwLSt\mathcal{W}^{\mathrm{wLSt}}, is linear for the spectral action of Perf(ZwLSt1(WE,Gˇ)/Gˇ)\operatorname{Perf}(Z^1_{\mathrm{wLSt}}(W_E,\check{G})/\check{G}) on both sides, and is tt-exact for the good filtration tt-structure on the left and the perverse tt-structure on the right. The same assertion holds after replacing wLSt\mathrm{wLSt} everywhere with LSt\mathrm{LSt}. This is a refinement of the dd-adic categorical Langlands conjecture to Langlands-Shahidi type parameters; the stated tt-exactness is related to right tt-exactness of Hecke operators for representations with good filtration. The conjecture remains open.

Sources & referencesView supporting material

Primary source

Konrad Zou, “On the action of the center in the -adic categorical Langlands program”, arXiv:2606.22747 (2026).

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