most citedObstruction classes of crossed modules of Lie algebroids and Lie groupoids linked to existence of principal bundles

9 citations · 9 across the 3 of their papers we have counts for

collaborators

3 papers

math.QA2008

Associative algebra deformations of the Connes-Moscovici's Hopf algebra

Alice Fialowski, Friedrich Wagemann

We compute the second Hochschild cohomology space of Connes-Moscovici's Hopf algebra , giving the infinitesimal deformations (up to equivalence…

math.KT2006

On Lie algebra crossed modules

Friedrich Wagemann

This article constructs a crossed module corresponding to the generator of the third cohomology group with trivial coefficients of a complex simple Lie algebra. This generator read…

math.AT2006★ 9 cited

Obstruction classes of crossed modules of Lie algebroids and Lie groupoids linked to existence of principal bundles

Camille Laurent-Gengoux, Friedrich Wagemann

Let K be a Lie group and P be a K-principal bundle on a manifold M. Suppose given furthermore a central extension 1\to Z\to \hat{K}\to K\to 1 of K. It is a classical question wheth…