Harris–Viehmann conjecture for non-basic local Shimura varieties

Assume that GG is quasi-split and let (G,[b],{μ})(G,[b],\{\mu\}) be a non-basic local Shimura datum. Let LL be a Levi subgroup, assume that JbJ_b is an inner form of a Levi subgroup contained in LL, and let PP be the corresponding parabolic subgroup with Levi factor LL. For each {μL}Ib,{μ},L\{\mu'_L\}\in I_{b,\{\mu\},L}, let H((L,[b]L,{μL}))[ρ]H^{\bullet}((L,[b]_L,\{\mu'_L\}))[\rho] be the associated Grothendieck-group element. Harris–Viehmann conjecture. In Groth(G(F)×WE{μ}){\rm Groth}(G(F)\times W_{E_{\{\mu\}}}),

H((G,[b],{μ}))[ρ]=IndP(F)G(F)({μL}Ib,{μ},LH((L,[b]L,{μL}))[ρ]).H^{\bullet}((G,[b],\{\mu\}))[\rho]=\operatorname{Ind}^{G(F)}_{P(F)}\left(\sum_{\{\mu'_L\}\in I_{b,\{\mu\},L}}H^{\bullet}((L,[b]_L,\{\mu'_L\}))[\rho]\right).

The conjecture proposes an inducing formula for cohomology in the non-basic case, generalizing the expected behavior from Levi subdata. The source explicitly notes substantial scepticism and that even the precise prediction may need modification.

Sources & referencesView supporting material

Primary source

Michael Rapoport and Eva Viehmann, “Towards a theory of local Shimura varieties”, arXiv:1401.2849 (2014).

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