Bounded elementary generation of SL_2: nearly the end

B. E. Kunyavskii, D. W. Morris, A. S. Rapinchuk

Let ${\mathcal{O}}_S$ be the ring of $S$-integers of a global field $K$ of any characteristic, where $S$ is a finite set of valuations of $K$ (and $S$ contains all of the archimedean…