Groups Generated by Root Unipotents: Higher-rank and rank-one

Yanlong Hao

For $n\ge 3$, let \[ Γ(Q)=\langle E_{ij}(q_{ij}):i\neq j\rangle \] be the subgroup of $\mathrm{SL}(n,\mathbb{R})$ generated by elementary matrices with nonzero rational param…