On commensurations of pro-C groups
Pedro Cusinato
Abstract
We study commensurations of pro-C groups, where C is an extension-closed variety of finite groups. We characterize those commensurations of pro-C groups that can be extended to embeddings into a common overgroup, obtaining a pro-C analog of a recent theorem by Touikan. We also consider obtain a structural result on virtual retracts of pro-C groups.
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