On weakly $sigma$-permutable subgroups of finite groups

Chi Zhang, Zhenfeng Wu, W. Guo

Let G be a finite group and σ = {σ_i, i \in I} be a partition of the set of all primes \mathbb{P}. A set \mathcal{H} of subgroups of G with 1 \in \mathcal{H} is said to be a comple…