3 problems

Let $\mathcal{O}_S$ be a ring of $S$-integers in a global function field $K$ of characteristic $p$, and let $\mathbf G$ be a noncommutative, absolutely almost simple algebraic $K$-…

Let $K$ be a global function field of characteristic $p$, let $\mathbf G$ be a $K$-isotropic algebraic group, and let $\Gamma$ be a finite-index subgroup of…

Let $E_{10}$ denote the overextended Dynkin diagram of $E_8$, and let $\mathfrak{G}_{\\!E_{10}}(\mathbb{Z})$ be the corresponding hyperbolic Kac–Moody group over $\mathbb{Z}$. Hull…