On the cyclic subgroup separability of free products of two groups with amalgamated subgroup

dc.creatorSokolov, E. V.
dc.date2007-08-21
dc.date.accessioned2026-07-07T08:24:44Z
dc.date.available2026-07-07T08:24:44Z
dc.descriptionLet $G$ be a free product of two groups with amalgamated subgroup, $π$ be either the set of all prime numbers or the one-element set \{$p$\} for some prime number $p$. Denote by $Σ$ the family of all cyclic subgroups of group $G$, which are separable in the class of all finite $π$-groups. Obviously, cyclic subgroups of the free factors, which aren't separable in these factors by the family of all normal subgroups of finite $π$-index of group $G$, the subgroups conjugated with them and all subgroups, which aren't $π^{\prime}$-isolated, don't belong to $Σ$. Some sufficient conditions are obtained for $Σ$ to coincide with the family of all other $π^{\prime}$-isolated cyclic subgroups of group $G$. It is proved, in particular, that the residual $p$-finiteness of a free product with cyclic amalgamation implies the $p$-separability of all $p^{\prime}$-isolated cyclic subgroups if the free factors are free or finitely generated residually $p$-finite nilpotent groups.
dc.description10 pages; for other papers of this author, see http://icu.ivanovo.ac.ru/tg-seminar
dc.identifierhttps://arxiv.org/abs/0708.2819
dc.identifierhttp://arxiv.org/abs/0708.2819
dc.identifierLobachevskii Journal of Mathematics. 11 (2002). 27-38
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/136440
dc.subjectGroup Theory
dc.subject20E06, 20E26 (Primary)
dc.titleOn the cyclic subgroup separability of free products of two groups with amalgamated subgroup
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