Finite index subgroups of graph products
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- Cite this article as:
- Haglund, F. Geom Dedicata (2008) 135: 167. doi:10.1007/s10711-008-9270-0
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.