Index theorey and Non-Commutative Geometry. II. Dirac operators and index bundles

Details Index theorey and Non-Commutative Geometry. II. Dirac operators and index bundles Index theorey and Non-Commutative Geometry. II. Dirac operators and index bundles

2005-04-19

arxiv.org/abs/math/0504385v1

Mathematics

Geometric Topology

Scientific paper

When the index bundle of a longitudinal Dirac type operator is transversely smooth, we define its Chern character in Haefliger cohomology and relate it to the Chern character of the $K-$theory index. This result gives a concrete connection between the topology of the foliation and the longitudinal index formula. Moreover, the usual spectral assumption on the Novikov-Shubin invariants of the operator is improved.

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