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A characterization of soluble groups in which normality is a transitive relation
(University of Isfahan, 2017-03-01)
A subgroup $X$ of a group $G$ is said to be an H-subgroup if N<sub>G</sub>(X) ∩ X<sup>g </sup>≤ X for each element $g$ belonging to $G$. In [M. Bianchi and e.a., On finite soluble groups in which normality is a transitive relation, J. Group Theory, <strong> 3</strong> (2000) 147--156.] the authors showed that finite groups in which every subgroup has the H-property are exactly soluble groups in which normality is a transitive relation. Here we extend this characterization to groups without simple sections....