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Sibirskii Matematicheskii Zhurnal, 2024, Volume 65, Number 1, Pages 207–228
DOI: https://doi.org/10.33048/smzh.2024.65.116
(Mi smj7850)
 

On the separability of abelian subgroups of the fundamental groups of graphs of groups. II

E. V. Sokolov

Ivanovo State University
References:
Abstract: Consider the fundamental group ${\frak G}$ of an arbitrary graph of groups and some root class ${\mathcal C}$ of groups, i.e., a class containing a nontrivial group and closed under subgroups, extensions, and unrestricted direct products of the form $\prod_{y \in Y} X_{y}$, where $X,Y \in {\mathcal C}$ and $X_{y}$ is an isomorphic copy of $X$ for each $y \in Y$. We provide some criterion for the separability by ${\mathcal C}$ of a finitely generated abelian subgroup of ${\frak G}$ valid when the group satisfies an analog of the Baumslag filtration condition. This enables us to describe the ${\mathcal C}$-separable finitely generated abelian subgroups for the fundamental groups of some graphs of groups with central edge subgroups.
Keywords: separability of abelian subgroups, separability of cyclic subgroups, root-class residuality, fundamental group of a graph of groups, tree product.
Funding agency Grant number
Russian Science Foundation 22-21-00166
Received: 20.03.2023
Revised: 20.03.2023
Accepted: 02.08.2023
Document Type: Article
UDC: 512.543
Language: Russian
Citation: E. V. Sokolov, “On the separability of abelian subgroups of the fundamental groups of graphs of groups. II”, Sibirsk. Mat. Zh., 65:1 (2024), 207–228
Citation in format AMSBIB
\Bibitem{Sok24}
\by E.~V.~Sokolov
\paper On the separability of abelian subgroups of the fundamental groups of graphs of groups.~II
\jour Sibirsk. Mat. Zh.
\yr 2024
\vol 65
\issue 1
\pages 207--228
\mathnet{http://mi.mathnet.ru/smj7850}
\crossref{https://doi.org/10.33048/smzh.2024.65.116}
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    Сибирский математический журнал Siberian Mathematical Journal
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