A cohomology theory for Lie 2-algebras
arXiv:1811.03876 · doi:10.1142/S0219199721500176
Abstract
In this article, we introduce a new cohomology theory associated to a Lie 2-algebras. This cohomology theory is shown to extend the classical cohomology theory of Lie algebras; in particular, we show that the second cohomology group classifies an appropriate type of extensions.