Semistability and Simple Connectivity at Infinity of Finitely Generated Groups with a Finite Series of Commensurated Subgroups

Michael Mihalik

A subgroup $H$ of a group $G$ is $commensurated$ in $G$ if for each $g\in G$, $gH{g}^{-1}\cap H$ has finite index in both $H$ and $gH{g}^{-1}$. If there is a sequence of subgroups $H=Q…