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In mathematics, in the field of group theory, a subgroup of a group is called c-normal if there is a normal subgroup of such that and the intersection of and lies inside the normal core of . For a weakly c-normal subgroup, we only require to be subnormal. Here are some facts on c-normal subgroups: *Every normal subgroup is c-normal *Every retract is c-normal *Every c-normal subgroup is weakly c-normal ==References== * Y. Wang, c-normality of groups and its properties, Journal of Algebra, Vol. 180 (1996), 954-965 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「C-normal subgroup」の詳細全文を読む スポンサード リンク
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