Mapping tori of free group automorphisms are coherent
Group Theory
2009-09-25 v1
Abstract
The mapping torus of an endomorphism \Phi of a group G is the HNN-extension G*_G with bonding maps the identity and \Phi. We show that a mapping torus of an injective free group endomorphism has the property that its finitely generated subgroups are finitely presented and, moreover, these subgroups are of finite type.
Keywords
Cite
@article{arxiv.math/9905209,
title = {Mapping tori of free group automorphisms are coherent},
author = {Mark Feighn and Michael Handel},
journal= {arXiv preprint arXiv:math/9905209},
year = {2009}
}
Comments
17 pages, published version