D-bar Sparks, I

Details D-bar Sparks, I D-bar Sparks, I

2005-12-12

arxiv.org/abs/math/0512247v2

Mathematics

Differential Geometry

This is a slightly revised version with more introductory material

Scientific paper

A d-bar-analogue of differential characters for complex manifolds is introduced and studied using a new theory of homological spark complexes. Many essentially different spark complexes are shown to have isomorphic groups of spark classes. This has many consequences: It leads to an analytic representation of O*-gerbes with connection, it yields a soft resolution of the sheaf O* by currents on the manifold, and more generally it gives a Dolbeault-Federer representation of Deligne cohomology as the cohomology of certain complexes of currents. It is shown that the d-bar-spark classes H^*(X) carry a functorial ring structure. Holomorphic bundles have Chern classes in this theory which refine the integral classes and satisfy Whitney duality. A version of Bott vanishing for holomorphic foliations is proved in this context.

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