On $\Pi$-permutable subgroups of finite groups

Wenbin Guo, A. N. Skiba

Let $\sigma =\{{\sigma }_i|i\in I\}$ be some partition of the set of all primes $\mathbb{P}$ and $\Pi$ a non-empty subset of the set $\sigma$. A set $\mathcal{H}$ of subgroups of a finite group $G$ is sa…