On an equivariant version of the zeta function of a transformation
Abstract
Earlier the authors offered an equivariant version of the classical monodromy zeta function of a G-invariant function germ with a finite group G as a power series with the coefficients from the Burnside ring of the group G tensored by the field of rational numbers. One of the main ingredients of the definition was the definition of the equivariant Lefschetz number of a G-equivariant transformation given by W.L\"uck and J.Rosenberg. Here we offer another approach to a definition of the equivariant Lefschetz number of a transformation and describe the corresponding notions of the equivariant zeta function. This zeta-function is a power series with the coefficients from the Burnside ring of the group G. We give an A'Campo type formula for the equivariant monodromy zeta function of a function germ in terms of a resolution. Finally we discuss orbifold versions of the Lefschetz number and of the monodromy zeta function corresponding to the two equivariant ones.
Keywords
Cite
@article{arxiv.1203.3344,
title = {On an equivariant version of the zeta function of a transformation},
author = {S. M. Gusein-Zade and I. Luengo and A. Melle-Hernandez},
journal= {arXiv preprint arXiv:1203.3344},
year = {2013}
}
Comments
arXiv admin note: text overlap with arXiv:0803.3708 . This is an improved revised version of the paper including a new section where orbifold versions of the Lefschetz number and of the monodromy zeta function corresponding to the two equivariant ones are discussed