Groups with normal restriction property

Details Groups with normal restriction property Groups with normal restriction property

2009-12-04

arxiv.org/abs/0912.0865v1

Arch. Math. vol. 93, no. 3, 199--203, 2009

Mathematics

Group Theory

5 pages

Scientific paper

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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