English

On classes of finite groups with simple non-abelian chief factors

Group Theory 2017-11-07 v1

Abstract

Let J\mathfrak{J} be a class of non-abelian simple groups and X\mathfrak{X} be a class of groups. A chief factor H/KH/K of a group GG is called X\mathfrak{X}-central in GG provided (H/K)G/CG(H/K)X(H/K)\rtimes G/C_G(H/K)\in\mathfrak{X}. We say that GG is a Jcs\mathfrak{J}cs-X\mathfrak{X}-\emph{group} if every chief X\mathfrak{X}-factor of GG is X\mathfrak{X}-central and other chief factors of GG are simple J\mathfrak{J}-groups. We use XJcs\mathfrak{X}_{\mathfrak{J}cs} to denote the class of all Jcs\mathfrak{J}cs-X\mathfrak{X}-groups. A subgroup UU of a group GG is called X\mathfrak{X}-\emph{maximal} in GG provided that (a)(a) UXU\in\mathfrak{X}, and (b)(b) if UVGU\leq V \leq G and VXV\in\mathfrak{X}, then U=VU = V. In this paper we described the structure of Jcs\mathfrak{J}cs-H\mathfrak{H}-groups for a solubly saturated formation H\mathfrak{H} and all hereditary saturated formations F\mathfrak{F} containing all nilpotent groups such that the FJcs\mathfrak{F}_{\mathfrak{J}cs}-hypercenter of GG coincides with the intersection of all FJcs\mathfrak{F}_{\mathfrak{J}cs}-maximal subgroups of GG for every group GG.

Keywords

Cite

@article{arxiv.1711.01686,
  title  = {On classes of finite groups with simple non-abelian chief factors},
  author = {V. I. Murashka},
  journal= {arXiv preprint arXiv:1711.01686},
  year   = {2017}
}