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Electronic Research Announcements

ISSN 1079-6762



Drinfel'd doubles and Ehresmann doubles for
Lie algebroids and Lie bialgebroids

Author: K. C. H. Mackenzie
Journal: Electron. Res. Announc. Amer. Math. Soc. 4 (1998), 74-87
MSC (1991): Primary 58F05; Secondary 17B66, 18D05, 22A22, 58H05
Published electronically: October 22, 1998
MathSciNet review: 1650045
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Abstract: We show that the Manin triple characterization of Lie bialgebras in terms of the Drinfel'd double may be extended to arbitrary Poisson manifolds and indeed Lie bialgebroids by using double cotangent bundles, rather than the direct sum structures (Courant algebroids) utilized for similar purposes by Liu, Weinstein and Xu. This is achieved in terms of an abstract notion of double Lie algebroid (where double is now used in the Ehresmann sense) which unifies many iterated constructions in differential geometry.

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K. C. H. Mackenzie
Affiliation: School of Mathematics and Statistics, University of Sheffield, Sheffield, S3 7RH, England

Received by editor(s): July 12, 1998
Published electronically: October 22, 1998
Communicated by: Frances Kirwan
Article copyright: © Copyright 1998 American Mathematical Society