The depth-zero restricted-parameter conjecture

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Let GG be a connected reductive group over FF that splits over a tame extension. Let π\pi be a depth-zero irreducible representation of G(F)G(F), and let ϕπ∈RP⁡0\phi_\pi\in\operatorname{RP}_0 be its restricted depth-zero parameter as constructed in Lemma~. Depth-zero restricted-parameter conjecture. The restriction of a Langlands parameter for π\pi to I⁡F/I⁡F0+\operatorname{I}_F/\operatorname{I}_F^{0+} lands in the G∨G^\vee-conjugacy class of ϕπ\phi_\pi. This is the depth-zero analogue of the paper's positive-depth compatibility conjecture; the source provides no general resolution.

References

Primary source

Tsao-Hsien Chen, Stephen DeBacker and Cheng-Chiang Tsai, “Langlands parameters for Moy-Prasad types”, arXiv:2509.07780 (2025).

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