, Volume 135, Issue 1, pp 167-209
Date: 27 May 2008

Finite index subgroups of graph products

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Abstract

We prove that every quasiconvex subgroup of a right-angled Coxeter group is an intersection of finite index subgroups. From this we deduce similar separability results for other types of groups, including graph products of finite groups and right-angled Artin groups.