Transversality and Lefschetz numbers for foliation maps

Details Transversality and Lefschetz numbers for foliation maps Transversality and Lefschetz numbers for foliation maps

2008-01-30

arxiv.org/abs/0801.4628v1

Mathematics

Geometric Topology

29 pages

Scientific paper

Let $F$ be a smooth foliation on a closed Riemannian manifold $M$, and let $\Lambda$ be a transverse invariant measure of $F$. Suppose that $\Lambda$ is absolutely continuous with respect to the Lebesgue measure on smooth transversals. Then a topological definition of the $\Lambda$-Lefschetz number of any leaf preserving diffeomorphism $(M,F)\to(M,F)$ is given. For this purpose, standard results about smooth approximation and transversality are extended to the case of foliation maps. It is asked whether this topological $\Lambda$-Lefschetz number is equal to the analytic $\Lambda$-Lefschetz number defined by Heitsch and Lazarov which would be a version of the Lefschetz trace formula. Heitsch and Lazarov have shown such a trace formula when the fixed point set is transverse to $F$.

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