Equality of rational and Zariski wave-front sets

Let FF be a nonarchimedean local field, let GG be a reductive algebraic group over FF, and let π\pi be an irreducible admissible representation of G(F)G(F). Let WFrat(π)\operatorname{WF}^{rat}(\pi) and WFZar(π)\operatorname{WF}^{Zar}(\pi) be the rational and Zariski wave-front sets, and let WFrat(π)\overline{\operatorname{WF}}^{rat}(\pi) and WFZar(π)\overline{\operatorname{WF}}^{Zar}(\pi) be their corresponding geometric wave-front sets. Equality of rational and Zariski wave-front sets. We have

WFrat(π)=WFZar(π)\overline{\operatorname{WF}}^{rat}(\pi)=\overline{\operatorname{WF}}^{Zar}(\pi)

or equivalently

WFrat(π)=WFZar(π).\operatorname{WF}^{rat}(\pi)=\operatorname{WF}^{Zar}(\pi).

The paper presents this statement as equivalent to the singleton formulation in the relevant setting, and the first counterexample to the geometric singleton conjecture also refutes it. Thus it is not open in the generality considered here.

Sources & referencesView supporting material

Primary source

Cheng-Chiang Tsai, “On two definitions of wave-front sets for p-adic groups”, arXiv:2306.09536 (2025).

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