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arXiv · 1111.1954

Monodromy and the Lefschetz fixed point formula

E. Hrushovski·F. Loeser
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Abstract

We give a new proof - not using resolution of singularities - of a formula of Denef and the second author expressing the Lefschetz number of iterates of the monodromy of a function on a smooth complex algebraic variety in terms of the Euler characteristic of a space of truncated arcs. Our proof uses l-adic cohomology of non-archimedean spaces, motivic integration and the Lefschetz fixed point formula for finite order automorphisms. We also consider a generalization due to Nicaise and Sebag and at the end of the paper we discuss connections with the motivic Serre invariant and the motivic Milnor fiber.

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E. Hrushovski, F. Loeser. 2011-11-08. Monodromy and the Lefschetz fixed point formula. https://arxiv.org/abs/1111.1954

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