Narrow subgroups
01.12.2022 -
The preprint "Narrow normal subgroups of Coxeter groups and of automorphism groups of Coxeter groups" by Luis Paris and Olga Varghese has been recently uploaded to the arXiv!
Link to the paper: arXiv:2211.16906
Abstract:
By definition, a group is called narrow if it does not contain a copy of a non-abelian free group. We describe the structure of finite and narrow normal subgroups in Coxeter groups and their automorphism groups.