Vogan L-packet genericity equivariance conjecture

Let GG be a quasi-split connected reductive group over a local field kk of characteristic zero, let GG' be a pure inner form, and let Πφ\Pi'_{\varphi} be the standard LL-packet of GG' inside the Vogan LL-packet Π~φ\widetilde{\Pi}_{\varphi}. Choose a Whittaker-compatible parametrization ρπρ\rho\mapsto\pi_{\rho} of Π~φ\widetilde{\Pi}_{\varphi}, and let ζφ:Gad(k)/p(G(k))Rφ^\zeta'_{\varphi}:G'_{\operatorname{ad}}(k)/p(G'(k))\to\widehat{R_{\varphi}} be the canonical map described in the text. Vogan L-packet genericity equivariance conjecture. For gGad(k)g\in G'_{\operatorname{ad}}(k), if πρΠφ\pi_{\rho}\in\Pi'_{\varphi}, then

πρAd(g)=πgρ,gρ=ρζφ(g).\pi_{\rho}\circ\operatorname{Ad}(g)=\pi_{g\cdot\rho},\qquad g\cdot\rho=\rho\otimes\zeta'_{\varphi}(g).

Moreover, πρ\pi_{\rho} is ψ\psi-generic if and only if πgρ\pi_{g\cdot\rho} is gψg\cdot\psi-generic. This is the pure-inner-form version of the expected compatibility between packet parametrizations, conjugation, and genericity; the supplied text gives no resolution status.

Sources & referencesView supporting material

Primary source

Manish Mishra, “Generic representations in L-packets”, arXiv:1510.00270 (2015).

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