The unstable complex in Bruhat-Tits buildings for arithmetic groups over function fields

Gebhard Böckle, Sriram Chinthalagiri Venkata

Let $K$ be a function field in positive characteristic, $\infty$ be a fixed place of $K$ and $K_{\infty }$ be the completion of $K$ at $\infty$. By the work of Serre, it is well known…