On finite groups factorized by $\sigma$-nilpotent subgroups

Zhenfeng Wu, Chi Zhang

Let $G$ be a finite group and $\sigma =\{{\sigma }_i|i\in I\}$ be a partition of the set of all primes $\mathbb{P}$, that is, $\mathbb{P}={\bigcup }_{i\in I}{\sigma }_i$ and ${\sigma }_i\cap {\sigma }_j=\varnothing$…