Categorical Langlands conjecture for the full derived category

Let GG be a quasi-split reductive group over EE, let Gˇ\check{G} be its Langlands dual group, and assume π0(Z(G))\ell\nmid\lvert\pi_0(Z(G))\rvert. Let WEW_E be the Weil group and let Z1(WE,Gˇ)/GˇZ^1(W_E,\check{G})/\check{G} be the stack of 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. Categorical Langlands conjecture. For the functor

W ⁣:IndPerfqc(Z1(WE,Gˇ)/Gˇ)D(BunG)-*\mathcal{W}\colon\operatorname*{Ind}\operatorname{Perf}^{\mathrm{qc}}(Z^1(W_E,\check{G})/\check{G})\to\operatorname{\mathcal{D}}(\operatorname{Bun}_G)

given by the spectral action on W\mathcal{W}, the right adjoint cWc_{\mathcal{W}} is fully faithful on D(BunG)ω\operatorname{\mathcal{D}}(\operatorname{Bun}_G)^\omega, and the essential image of D(BunG)ω\operatorname{\mathcal{D}}(\operatorname{Bun}_G)^\omega under cWc_{\mathcal{W}} is CohNilp(Z1(WE,Gˇ)/Gˇ)\operatorname{Coh}_{\mathrm{Nilp}}(Z^1(W_E,\check{G})/\check{G}). This is the full dd-adic categorical Langlands statement recalled before the paper's specialization to Langlands-Shahidi type parameters. Its resolution is not indicated in the supplied text, so it 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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