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math.GR2016
Commensurated subgroups in tree almost automorphism groups
Adrien Le Boudec, Phillip Wesolek
We prove that the tree almost automorphism groups admit exactly three commensurability classes of closed commensurated subgroups. Our proof utilizes an independently interesting ch…
math.GR2016
Commensurated subgroups in finitely generated branch groups
Phillip Wesolek
A subgroup is commensurated if for all . We show a finitely generated branch group is just infinite if and only if every commensurated…