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Title

Modular vector fields and Batalin-Vilkovisky algebras

Authors 1

Affiliations

  1. U.M.R. 7640 du C.N.R.S., Centre de Mathématiques, Ecole Polytechnique, F-91128 Palaiseau, France

Abstract

We show that a modular class arises from the existence of two generating operators for a Batalin-Vilkovisky algebra. In particular, for every triangular Lie bialgebroid (A,P) such that its top exterior power is a trivial line bundle, there is a section of the vector bundle A whose dP-cohomology class is well-defined. We give simple proofs of its properties. The modular class of an orientable Poisson manifold is an example. We analyse the relationships between generating operators of the Gerstenhaber algebra of a Lie algebroid, right actions on the elements of degree 0, and left actions on the elements of top degree. We show that the modular class of a triangular Lie bialgebroid coincides with the characteristic class of a Lie algebroid with representation on a line bundle.

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Banach Center Publications
2000/51/1
Export to PBN, Opens in new tab
Pages:
109-129
Main language of publication
English
Published
2000
Exact and natural sciences