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arXiv · 2610.16877

The modulo distinction problem for D*

Junyan Liu·Hengfei Lu
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Abstract

Let $F$ be a nonarchimedean local field of characteristic zero and residue characteristic $p$. Let $E$ be a quadratic field extension of $F$. Let $D$ be the unique quaternion division algebra defined over $F$. Let $G=\GL_{2}(E)$ and $H=D^\times$. This paper studies the modulo distinction problem for the pair $(G,H)$ with $\ell\neq p$, which gives a complete classification of $H$-distinguished representations of $G$, including the cases $\ell=2$ and $p=2$. In terms of type theory, we give a complete classification of $H$-distinguished supercuspidal representations when $p$ is odd.

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Junyan Liu, Hengfei Lu. 2026-10-12. The modulo distinction problem for D*. https://arxiv.org/abs/2610.16877

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