Index theory for basic Dirac operators on Riemannian foliations
arXiv:1008.1757 · doi:10.1090/conm/546
Abstract
In this paper we prove a formula for the analytic index of a basic Dirac-type operator on a Riemannian foliation, solving a problem that has been open for many years. We also consider more general indices given by twisting the basic Dirac operator by a representation of the orthogonal group. The formula is a sum of integrals over blowups of the strata of the foliation and also involves eta invariants of associated elliptic operators. As a special case, a Gauss-Bonnet formula for the basic Euler characteristic is obtained using two independent proofs.
33 pages
References in corpus (5)
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- The invertible double of elliptic operators
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