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arXiv · 1705.09420

Localization of Bott-Chern classes and Hermitian residues

Maurício Corrêa Jr·Tatsuo Suwa
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Abstract

We develop a theory of Cech-Bott-Chern cohomology and in this context we naturally come up with the relative Bott-Chern cohomology. In fact Bott-Chern cohomology has two relatives and they all arise from a single complex. Thus we study these three cohomologies in a unified way and obtain a long exact sequence involving the three. We then study the localization problem of characteristic classes in the relative Bott-Chern cohomology. For this we define the cup product and integration in our framework and we discuss local and global duality homomorphisms. After reviewing some materials on connections, we give a vanishing theorem relevant to our localization. With these, we prove a residue theorem for a vector bundle admitting a Hermitian connection compatible with an action of the non-singular part of a singular distribution. As a typical case, we discuss the action of a distribution on the normal bundle of an invariant submanifold (so-called the Camacho-Sad action) and give a specific example.

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Maurício Corrêa Jr, Tatsuo Suwa. 2019-08-15. Localization of Bott-Chern classes and Hermitian residues. https://doi.org/10.1112/jlms.12273

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