On a non-Abelian Poincaré lemma

Details On a non-Abelian Poincaré lemma On a non-Abelian Poincaré lemma

2009-05-03

arxiv.org/abs/0905.0287v3

Mathematics

Differential Geometry

LaTeX, 21 pages. Apart from minor editing, the new version contains more about the "abstract" setup (such as the statement abo

Scientific paper

We show that a well-known result on solutions of the Maurer--Cartan equation extends to arbitrary (inhomogeneous) odd forms: any such form with values in a Lie superalgebra satisfying $d\o+\o^2=0$ is gauge-equivalent to a constant, $$\o=gCg^{-1}-dg\,g^{-1}\,.$$ This follows from a non-Abelian version of a chain homotopy formula making use of multiplicative integrals. An application to Lie algebroids and their non-linear analogs is given. Constructions presented here generalize to an abstract setting of differential Lie superalgebras where we arrive at the statement that odd elements (not necessarily satisfying the Maurer--Cartan equation) are homotopic\,---\,in a certain particular sense\,---\,if and only if they are gauge-equivalent.

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