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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…
math.DG2006★ 5 cited
From Lie groupoids to resolutions of singularities. Applications to symplectic and Poisson resolutions
Camille Laurent-Gengoux
We use the techniques of integration of Poisson manifolds into symplectic Lie groupoids to build symplectic resolutions (= desingularizations) of the closure of a symplectic leaf.…