Vogan's conjecture identifying Arthur and ABV-packets

Let GG be a connected reductive pp-adic group and let ψ:WFLG\psi:W_F”\to{}^LG be an Arthur parameter. Write ϕψ\phi_\psi for the associated Langlands parameter, and let Πψpure(G)\Pi_\psi^{\mathrm{pure}}(G) and ΠϕψABV,pure(G)\Pi_{\phi_\psi}^{\mathrm{ABV,pure}}(G) denote the pure Arthur and pure ABV-packets. Vogan's conjecture. One has

Πψpure(G)=ΠϕψABV,pure(G).\Pi_\psi^{\mathrm{pure}}(G)=\Pi_{\phi_\psi}^{\mathrm{ABV,pure}}(G).

This conjecture connects Arthur's packet formalism with the microlocal ABV construction. It is proved for G=GLnG=\operatorname{GL}_n and in other cases cited in the paper, but is not established for all connected reductive pp-adic groups.

Sources & referencesView supporting material

Primary source

Kristaps Balodis, Clifton Cunningham, Andrew Fiori and Qing Zhang, “Representations of p-adic groups and orbits with smooth closure in a variety of Langlands parameters”, arXiv:2504.04163 (2025).

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