Non-connected Lie groups, twisted equivariant bundles and coverings

G. Barajas, O. García-Prada, P. B. Gothen +1

Let $\Gamma$ be a finite group acting on a Lie group $G$. We consider a class of group extensions $1\to G\to \hat{G}\to \Gamma \to 1$ defined by this action and a $2$-cocycle of $\Gamma$ with v…