A formula for the normal subgroup growth of Baumslag-Solitar groups
Group Theory
2007-08-21 v1
Abstract
We give an exact formula for the number of normal subgroups of each finite index in the Baumslag-Solitar group BS(p,q) when p and q are coprime. Unlike the formula for all finite index subgroups, this one distinguishes different Baumslag-Solitar groups and is not multiplicative. This allows us to give an example of a finitely generated profinite group which is not virtually pronilpotent but whose zeta function has an Euler product.
Keywords
Cite
@article{arxiv.0708.2494,
title = {A formula for the normal subgroup growth of Baumslag-Solitar groups},
author = {J. O. Button},
journal= {arXiv preprint arXiv:0708.2494},
year = {2007}
}