Quotients of the Bruhat-Tits tree by arithmetic subgroups of special unitary groups

Luis Arenas-Carmona, Claudio Bravo, Benoit Loisel +1

Let $K$ be the function field of a curve $C$ over a field $\mathbb{F}$ of either odd or zero characteristic. Following the work by Serre and Mason on ${\mathrm{SL}}_2$, we study the…