Canonical splitting and unramifiedness compatibility conjecture
Canonical splitting and unramifiedness compatibility conjecture
Let be the set of relevant subgroups, let be the image defined in the preceding diagrams, and let \phi_\overline{\overline{\overline{\overline{\chi}}}} be the parameter of an unramified genuine character. Let \mathcal{S}(\phi_\overline{\overline{\overline{\overline{\chi}}}}) be its component group. Unramified packet compatibility conjecture. There is a canonical splitting of over , together with a bijection
\mathcal{L}(\phi_\overline{\overline{\overline{\overline{\chi}}}})\longleftrightarrow\operatorname{Irr}(\mathcal{S}(\phi_\overline{\overline{\overline{\overline{\chi}}}})),written \pi(\phi_\overline{\overline{\overline{\overline{\chi}}}},\rho)\leftrightarrow\rho. For every , splitting agreeing with on , , and such that is associated with , one has that \pi(\phi_\overline{\overline{\overline{\overline{\chi}}}},\rho) is -unramified if and only if \pi(\phi_\overline{\overline{\overline{\overline{\chi}}}},\gamma_{z,y}\cdot\rho) is -unramified, where
This would describe how unramifiedness transforms under the dual torus and character actions.
Sources & referencesView supporting material
Primary source
Fan Gao, Freydoon Shahidi and Dani Szpruch, “Restrictions, L-parameters, and local coefficients for genuine representations”, arXiv:2102.08859 (2021).
Progress summary
Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.
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