On subgroups of finite index in branch groupsReport as inadecuate



 On subgroups of finite index in branch groups


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We give a structural description of the normal subgroups of subgroups of finite index in branch groups in terms of rigid stabilizers. This gives further insight into the structure lattices of branch groups introduced by the second author. We derive a condition concerning abstract commensurability of branch groups acting on the p-ary tree for any prime p.



Author: Alejandra Garrido; John S. Wilson

Source: https://archive.org/







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