Extensions between Verma modules for dihedral groups

Abstract

Computing the extensions between Verma modules is in general a very difficult problem. Using Soergel bimodules, one can construct a graded version of the principal block of Category $\mathcal{O}$ for any finite coxeter group. In this setting, we compute the extensions between Verma modules for dihedral groups.

References in corpus (1)

• Mixed modular perverse sheaves on moment graphs