Double cosets $NgN$ of normalizers of maximal tori of simple algebraic groups and orbits of partial actions of Cremona subgroups

N. Gordeev, E. Egorchenkova

Let $G$ be a simple algebraic group over an algebraically closed field $K$ and let $N=N_G(T)$ be the normalizer of a fixed maximal torus $T\le G$. Further, let $U$ be the unipot…