Crossed modular categories and the Verlinde formula for twisted conformal blocks
Crossed modular categories and the Verlinde formula for twisted conformal blocks
In this paper, we give a Verlinde formula for computing the ranks of the bundles of twisted conformal blocks associated with a simple Lie algebra equipped with an action of a finite group and a positive integral level $\ell$ under the assumption that $\Gamma$ preserves a Borel. As a motivation …