On θ-completions for Maximal Subgroups

• 作 者: ZAN Li-bo
• 机 构: DepartmentofMathematics
• 出 处: 数学季刊：英文版
• 发表日期: 2007年4期
• 关键词: θ完备化 指数 可解性 半群 θ-completion normal index solvability

<正>For a maximal subgroup M of a group G,a θ-completion for M is a subgroup C such that C is not contained in M while Ma,the core of M in G,is contained in C and C/M_G has no proper normal subgroup of G/M_G.This concept was introduced by ZHAO Yao-qi