Let A be a subgroup of a group G and X be a nonempty subset of G. A is said to be X-semipermutable in G if A has a suppl......

最近几年,利用子群的置换性质刻画有限群结构成为了人们感兴趣的课题.文献（J.Algebra,2007,315：31-41.）引入了X-半置换子群的概念：设X......