具有正规限制性质的群
Groups with normal restriction property
摘要:
设G是有限群. G的子群M称为NR-子群,如果只要K在M中正规,则K^G \cap M=K,其中K^G是K在G中的正规闭包。利用有限单群的分类,证明了若G的每个极大子群是NR -子群,则G是可解群。这对伯科维奇提出的一个猜想给出了肯定的回答(Houston J Math 24:631-638,1998)。
英文摘要:
Let G be a finite group. A subgroup M of G is said to be an NR-subgroup if, whenever K is normal in M, then K^G\cap M=K, where K^G is the normal closure of K in G. Using the Classification of Finite Simple Groups, we prove that if every maximal subgroup of G is an NR -subgroup then G is solvable. This gives a positive answer to a conjecture posed in Berkovich (Houston J Math 24:631-638, 1998).
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