A brief note on the spectrum of the basic Dirac operator

Details A brief note on the spectrum of the basic Dirac operator A brief note on the spectrum of the basic Dirac operator

2008-09-14

arxiv.org/abs/0809.2406v1

Mathematics

Differential Geometry

Scientific paper

In this paper, we prove the invariance of the spectrum of the basic Dirac operator defined on a Riemannian foliation $(M,\mathcal{F})$ with respect to a change of bundle-like metric. We then establish new estimates for its eigenvalues on spin flows in terms of the O'Neill tensor and the first eigenvalue of the Dirac operator on $M$. We discuss examples and also define a new version of the basic Laplacian whose spectrum does not depend on the choice of bundle-like metric.

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