Descent and generalized Whittaker wavefront set conjecture

Let FF be a local field of characteristic zero, let GG be a classical group over FF, and let πΠF(G)\pi\in\Pi_F(G) have a generic local LL-parameter. Let WFdes(π)\operatorname{WF}_{\mathrm{des}}(\pi) be the descent wavefront set and let WFwm(π)\operatorname{WF}_{\mathrm{wm}}(\pi) be the generalized-Whittaker wavefront set. For des,wm\square\in\\{\mathrm{des},\mathrm{wm}\\}, use the superscripts smaxs-\mathrm{max} and rmaxr-\mathrm{max} for maximal members under the FF-stable and FF-rational topological orders, respectively. Descent and generalized Whittaker conjecture. One has

WFdes(π)smax=WFwm(π)smax,WFdes(π)rmax=WFwm(π)rmax.\operatorname{WF}_{\mathrm{des}}(\pi)^{s-\mathrm{max}}=\operatorname{WF}_{\mathrm{wm}}(\pi)^{s-\mathrm{max}},\qquad \operatorname{WF}_{\mathrm{des}}(\pi)^{r-\mathrm{max}}=\operatorname{WF}_{\mathrm{wm}}(\pi)^{r-\mathrm{max}}.

The proven inclusion of the descent wavefront set in the generalized-Whittaker wavefront set motivates this conjecture, which would identify their maximal members for both orders.

Sources & referencesView supporting material

Primary source

Dihua Jiang, Dongwen Liu, Zhikang Luo, Jia-Jun Ma and Lei Zhang, “Arithmetic Wavefront Set and Microlocal Structure of Harish-Chandra Character”, arXiv:2606.05735 (2026).

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