Countably recognizable classes of groups with restricted conjugacy classes

A group class ${ X}$ is said to be countably recognizable if a group belongs to ${X}$ whenever all its countable subgroups lie in ${X}$‎. ‎It is proved here that most of the relevant classes of groups defined by restrictions on the conjugacy classes are countably recognizable‎.

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Veröffentlicht in:International journal of group theory 2018-03, Vol.7 (1), p.5-16
Hauptverfasser: Francesco de Giovanni, Marco Trombetti
Format: Artikel
Sprache:eng
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Zusammenfassung:A group class ${ X}$ is said to be countably recognizable if a group belongs to ${X}$ whenever all its countable subgroups lie in ${X}$‎. ‎It is proved here that most of the relevant classes of groups defined by restrictions on the conjugacy classes are countably recognizable‎.
ISSN:2251-7650
2251-7669
DOI:10.22108/ijgt.2016.21235