Cech-De Rham theory for leaf spaces of foliations

Details Cech-De Rham theory for leaf spaces of foliations Cech-De Rham theory for leaf spaces of foliations

2000-12-10

arxiv.org/abs/math/0012069v1

Mathematics

Differential Geometry

22 pages

Scientific paper

The purpose of this paper is to present a ``Cech-De Rham'' model for the cohomology of leaf spaces. This model lends itself to the construction of characteristic classes (in the cohomology of classifying spaces) by explicit geometrical constructions which are immediate extensions of the standard constructions for manifolds. In particular we rediscover (and explain) the Thurston formula and the Bott formulas for cocycles on diffeomorphism groups. We also use the Cech-De Rham model to explicitly describe the relation between the cohomology of the classifying space, the basic cohomology, and the foliated cohomology of foliations.

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