On Periodic Groups and Shunkov Groups that are Saturated by Dihedral Groups and $A_5$

• Main Author: A. Shlepkin
• Format: Article
• Language: English
• Published: Irkutsk State University 2017-06-01
• Series: Известия Иркутского государственного университета: Серия "Математика"
• Subjects: Periodic groups; groups saturated with the set of groups; Shunkov group
• Online Access: http://isu.ru/journal/downloadArticle?article=_5da18f698508480abbd6e571cb3e7063&lang=rus

A group is said to be periodic, if any of its elements is of finite order. A Shunkov group is a group in which any pair of conjugate elements generates Finite subgroup with preservation of this property when passing to factor groups by finite Subgroups. The group $ G $ is saturated with groups from the set of groups $ X $ if any A finite subgroup $ K $ of $ G $ is contained in the subgroup of $ G $, Isomorphic to some group in $ X $. The paper establishes the structure of periodic groups And Shunkov groups saturated by the set of groups $\mathfrak {M} $ consisting of one finite simple non-Abelian group $ A_5 $ and dihedral groups with Sylow 2-subgroup of order 2. It is proved that A periodic group saturated with groups from $\mathfrak {M}, $ is either isomorphic to a prime Group $ A_5 $, or is isomorphic to a locally dihedral group with Sylow 2 subgroup of order 2. Also, the existence of the periodic part of the Shunkov group saturated with groups from the set $ \mathfrak {M} $ is proved, and the structure of this periodic part is established.