Paper “On π-S-permutable subgroups of finite groups” published in Mediterr. J. Math.

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A. Ballester-Bolinches, Yangming Li, Ning Su, and Zhuoqing Xie.

On π-S-permutable subgroups of finite groups.

 Mediterr. J. Math., 13(1):93–99, 2016

https://doi.org/10.1007/s00009-014-0479-x

Abstract

Let π be a set of primes. A subgroup H of a finite group G is said to be π-S-permutable in G if H permutes with every Sylow q-subgroup of G for all primes qπ. The main aim of this paper is to establish structural results about the normal closure of π-S-permutable subgroups and p-subgroups permuting with all p′-subgroups for a single prime p. Our results stem from a recent article by Isaacs and subsequent discussions with the authors about it.

2010 Mathematics Subject Classification: Primary 20D10; Secondary 20D15, 20D20, 20D40

Keywords: Finite group, Permutability, S-permutability, S-semipermutability, Normal closure

Paper “2-Engel relations between subgroups” published in J. Algebra

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M. P. Gállego, P. Hauck, and M. D. Pérez-Ramos

2-Engel relations between subgroups

J. Algebra, 447:31–55, 2016

https://doi.org/10.1016/j.jalgebra.2015.08.030

Abstract

In this paper we study groups G generated by two subgroups A and B such that 〈a, bis nilpotent of class at most 2 for all aA and  bB . A detailed description of the structure of such groups is obtained, generalizing the classical result of Hopkins and Levi on 2-Engel groups.

2010 Mathematical Subject Classification: Primary 20F45; Secondary 20F18, 20D15, 20F12

Keywords: 2-Engel condition, 2-generated subgroups, L-connection, Nilpotency class