Abstract

Let Δ(G) denote the intersection of all non-normal maximal subgroups of a group G. We introduce the class of T2-groups which are defined as the groups G for which G/Δ(G) is a T-group, that is, a group in which normality is a transitive relation. Several results concerning the class T2 are discussed. In particular, if G is a solvable group, then Sylow permutability is a transitive relation in G if and only if every subgroup H of G is a T2-group such that the nilpotent residual of H is a Hall subgroup of H.

Document Type

Article

Publication Date

7-2014

Notes/Citation Information

Published in Journal of Group Theory, v. 17, no. 4, p. 705-715.

© de Gruyter 2014

The copyright holders have granted the permission for posting the article here.

Digital Object Identifier (DOI)

http://dx.doi.org/10.1515/jgt-2013-0052

Included in

Mathematics Commons

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