Special involutions and bulky parabolic subgroups in finite Coxeter groups

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71399The conjugacy classes of so-called special involutions parameterize the constituents of the action of a finite Coxeter group on the cohomology of the complement of its complexified hyperplane arrangement. In this note we give a short intrinsic characterisation of special involutions in terms of so-called bulky parabolic subgroups.6 pagesGroup Theory20F55Special involutions and bulky parabolic subgroups in finite Coxeter groupstext