The conjecture on Aubert-Zelevinsky involutions of ABV-packets

Let GG be a reductive group over a non-Archimedean field, let ϕ\phi be an LL-parameter, and let ΠϕABV\Pi_{\phi}^{\mathrm{ABV}} denote its ABV-packet. Let ϕ^\widehat{\phi} be the Pyasetskii involution of ϕ\phi, and let π^\widehat{\pi} denote the Aubert-Zelevinsky involution of a representation π\pi. ABV-packet involution conjecture. The Aubert-Zelevinsky involution sends the ABV-packet of ϕ\phi to the ABV-packet of ϕ^\widehat{\phi}:

Πϕ^ABV=π^πΠϕABV.\Pi_{\widehat{\phi}}^{\mathrm{ABV}}=\\{\widehat{\pi}\mid \pi\in\Pi_{\phi}^{\mathrm{ABV}}\\}.

This is proposed as an extension of the known compatibility for local Arthur packets; the statement is presented as an expectation for ABV-packets beyond Arthur type.

Sources & referencesView supporting material

Primary source

Alexander Hazeltine and Chi-Heng Lo, “Algorithms on the Pyasetskii involution on local Langlands parameters of classical groups”, arXiv:2604.11049 (2026).

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