A contribution to the theory of $\ddot{I}ƒ$-properties of a finite group

A-Ming Liu, Wenbin Guo, Vasily G. Safonov +1

We characterize some classes of finite soluble groups. In particular, we prove that: a finite group $G$ is supersoluble if and only if $G$ has a normal subgroup $D$ such that $G/D$…