3 problems

Let $\Delta$ be the Bruhat–Tits building, let $\mathbb{X}$ be the coefficient system, let $X_{0,2}$ be the specified set of edges, and let $I$ be the relevant subgroup. Let…

Let $\Delta$ be the Bruhat–Tits building of dimension $d$, let $\mathbb{X}$ be the coefficient system, and let $\mathcal{X}$ be a set of facets. For each $i\leq d$, write…

Schneider–Ollivier's surjectivity conjecture. The canonical morphism $\mathbb{X}^*\to\mathcal{H}$ is a surjection.