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Search: MSC category 20E08 ( Groups acting on trees [See also 20F65] )

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1. CMB Online first

Button, Jack
 Tubular free by cyclic groups act freely on CAT(0) cube complexes We identify when a tubular group (the fundamental group of a finite graph of groups with $\mathbb{Z}^2$ vertex and $\mathbb{Z}$ edge groups) is free by cyclic and show, using Wise's equitable sets criterion, that every tubular free by cyclic group acts freely on a CAT(0) cube complex. Keywords:CAT(0), tubular groupCategories:20F65, 20F67, 20E08

2. CMB 2003 (vol 46 pp. 122)

Moon, Myoungho
 On Certain Finitely Generated Subgroups of Groups Which Split Define a group $G$ to be in the class $\mathcal{S}$ if for any finitely generated subgroup $K$ of $G$ having the property that there is a positive integer $n$ such that $g^n \in K$ for all $g\in G$, $K$ has finite index in $G$. We show that a free product with amalgamation $A*_C B$ and an $\HNN$ group $A *_C$ belong to $\mathcal{S}$, if $C$ is in $\mathcal{S}$ and every subgroup of $C$ is finitely generated. Keywords:free product with amalgamation, $\HNN$ group, graph of groups, fundamental groupCategories:20E06, 20E08, 57M07
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