Spherical subset of a Coxeter system
= Spherical subset of a Coxeter system
A subset $T\subseteq S$ is spherical when its <standard parabolic subgroup> $W_T$ is finite.
= Spherical subset of a Coxeter system
A subset $T\subseteq S$ is spherical when its <standard parabolic subgroup> $W_T$ is finite.