Atiyah sequence and Gauge transformations of a principal $2$-bundle over a Lie groupoid

Saikat Chatterjee, Adittya Chaudhuri, Praphulla Koushik

In this paper, a notion of a principal $2$-bundle over a Lie groupoid has been introduced. For such principal $2$-bundles, we produced a short exact sequence of VB-groupoids, namel…