Submission date: 9 November 2011.

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.

Mathematics Subject Classification: 03C98, 14B05, 14J17, 32S25, 32S55

Keywords and phrases:

Full text arXiv 1111.1954: pdf, ps.