English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The  norm  of a group was introduced by R. Baer as the intersection of all normalizers of subgroups, and it was later proved that the norm is always contained in the second term of the upper central series of the group. The aim of this paper is to study embedding properties of the  metanorm  of a group, defined as the intersection of all normalizers of non-abelian subgroups. The metanorm is related to the so-called  metahamiltonian groups , i.e. groups in which all non-abelian subgroups are normal, and it is known that every locally graded metahamiltonian group is finite over its second centre. Among other results, it is proved here that if  G  is a locally graded group whose metanorm  M  is not nilpotent, thenM  ′   /   M  ′′{M^{\prime}/M^{\prime\prime}}    is a small eccentric chief factor and it is the only obstruction to a strong hypercentral embedding of  M  in  G .

The metanorm, a characteristic subgroup: Embedding properties