研究极大子群和2-极大子群的θ-偶对群结构的影响.设G是有限群,本文得到了:如果G的每一个极大子群M都有极大θ-偶(C,D),使MC=G且C/D是2-闭的,那么G可解;如果G的每一个2-极大子群H都有θ-偶(C,D),使C/D幂零且G=HC,那么G是幂零.
We study the influence of θ-pairs for maximal subgroups and 2-maximal subgroups on the structure of group. Let G be a finite groups. If there exists a maximal θ-pair (C, D) such that MC = G and C/D is 2-closed for every maximal subgroup M of G, then G is solvable; If there exists a maximal θ-pair (C, D) such that HC = G and C/D is nilpotent for every 2-maximal subgroups H of G, then G is nilpotent.