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Karol Kozioł
A Classification of the Irreducible mod-$p$ Representations of $\textnormal{U}(1,1)(\mathbb{Q}_{p^2}/\mathbb{Q}_p)$
(Une classification des représentations irréductibles modulo $p$ de $\textnormal{U}(1,1)(\mathbb{Q}_{p^2}/\mathbb{Q}_p)$)
Annales de l'institut Fourier, 66 no. 4 (2016), p. 1545-1582, doi: 10.5802/aif.3043
Article PDF
Class. Math.: 22E50, 11F80, 11F85
Keywords: Supersingular representations, unitary group, mod-$p$ representations

Résumé - Abstract

Let $p$ be a prime number. We classify all smooth irreducible mod-$p$ representations of the unramified unitary group $\textnormal{U}(1,1)(\mathbb{Q}_{p^2}/\mathbb{Q}_p)$ in two variables. We then investigate Langlands parameters in characteristic $p$ associated to $\textnormal{U}(1,1)(\mathbb{Q}_{p^2}/\mathbb{Q}_p)$, and propose a correspondence between certain equivalence classes of Langlands parameters and certain isomorphism classes of semisimple $L$-packets on $\textnormal{U}(1,1)(\mathbb{Q}_{p^2}/\mathbb{Q}_p)$.

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