三个或多个素变数的线性方程

设G是有限群,p是|G|的一个素因子,P是G的一个Sylow p-子群.若下列条件之一满足,则G是p-幂零:(1)P的极大子群均在G中S-半正规且(|G|,p-1)=1;(2)P的二次极大子群均在G中S-半正规且(|G|,p2-1)=1.     

S-半正规性在有限群中可传递的判别

一个有限群G被称为ST-群,如果对于它的子群 H、K和L有H在K中S-半正规,K在L中S-半正规,则H总在L中S-半正规,本文证明:有限群G是一个可解ST-群的充要条件是G的任一 Sylow子群的每个子群皆在 G中 S-半正规或 Abnormal。     

某些子群为S-半正规的有限群

A subgroup H is called S-seminormal in a finite group G if H permutes with all Sylow p-subgroups of G with (p, |H| =1. The main object of this paper is to generalize some known results about finite supersolvable groups to a saturated formation containing the class of finite supersolvable groups.     

Finite Groups with only S-seminormal or Selfnormal Subgroups

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