The local rigid-inner-form packet conjecture
The local rigid-inner-form packet conjecture
Let be a local completion of the global function field , let be a connected reductive group over , and let be the Weil–Deligne group. For a tempered -parameter
write for the set of tempered representations of rigid inner forms of , for the relevant parameter centralizer, and for the local gerbe defining rigid inner twists. The local rigid-inner-form packet conjecture. There is a finite subset and a commutative diagram
\begin{tikzcd} \Pi_{\varphi_v} \arrow["\iota_{\varphi_v,\mathfrak{w}_v}"]{r} \arrow{d} & \operatorname{Irr}(\pi_0(S_{\varphi_v}^{+})) \arrow{d} \\ H^{1}(\mathcal{E}_v,Z\to G^{*}) \arrow{r} & \pi_0(Z(\widehat{\overline{G}})^{+,v})^{*}, \end{tikzcd}where is the quasi-split inner form and is the chosen finite central subgroup. This is the predicted local Langlands-packet structure for rigid inner forms; the source presents it as part of the conjectural framework, and no resolution status is supplied.
Sources & referencesView supporting material
Primary source
Peter Dillery, “Rigid inner forms over global function fields”, arXiv:2110.10820 (2025).
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