The Cauchy–Harish-Chandra character conjecture for p-adic dual pairs

Let (G,G)(\mathrm{G},\mathrm{G}') be a reductive dual pair over a non-Archimedean local field, let Π\Pi' be an irreducible admissible representation of G~\widetilde{\mathrm{G}'} occurring in Howe's correspondence, and let Π1\Pi_1 be the corresponding maximal Howe quotient representation of G~\widetilde{\mathrm{G}}. Write ΘΠ\Theta_{\Pi'} for the distribution character of Π\Pi', and let ZZ' and G0\mathrm{G}'{}^0 denote the center and the Zariski identity component of G\mathrm{G}', respectively. For a test function ΨCc(G~)\Psi\in C_c(\widetilde{\mathrm{G}}), assume the defining integral is absolutely convergent and define ΘΠ\Theta'_{\Pi'} by the Weyl–Harish-Chandra integration formula using the Cauchy–Harish-Chandra kernel Chch~\mathop{\text{Chc}}\nolimits_{\tilde h'}. Cauchy–Harish-Chandra character conjecture. If the character ΘΠ\Theta_{\Pi'} is supported in ZG0Z'\mathrm{G}'{}^0, then, as distributions,

ΘΠ=ΘΠ1.\Theta'_{\Pi'}=\Theta_{\Pi_1}.

The conjecture asserts that the p-adic Cauchy–Harish-Chandra integral recovers the character of the representation paired with Π\Pi' by Howe correspondence; the source formulates it under the preceding convergence condition and assuming the stated character conjecture used in the construction. Its general status is not resolved in the supplied text.

Sources & referencesView supporting material

Primary source

Hung Yean Loke and Tomasz Przebinda, “A Cauchy–Harish-Chandra integral for a dual pair over a p-adic field, the definition and a conjecture”, arXiv:2303.02192 (2023).

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