On generalization of minimal non-nilpotent groups

On generalization of minimal non-nilpotent groups
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最小非幂零群的推广

DOI:
10.1134/s1995080210030078
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发表时间:
2010-09
影响因子:
0.7
通讯作者:
Xiuyun Guo
Xiuyun Guo
中科院分区:
--
文献类型:
--
作者:
Qianlu Li;Xiuyun Guo

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一个有限群称为p-闭群,如果它的Sylow p-子群是正规的。一个极小非幂零群意味着它的所有真子群都是幂零的,但群本身不是。施密特证明了极小非幂零群对某个素数p是可解的和p-幂零的.本文推广了极小非幂零群和施密特的结果.考虑一个群,它有s(s ≤ 2)个真非p-闭子群Hi,i = 1,.,s,使得对于它的任何真子群R,如果R Hi,则R是p-闭的。证明了若群G满足条件H1 <$H2且H2 <$H1,则(1)H1,H2是G的极大正规子群且H1 <$H2 <$1。设N是G的包含在H1 <$H2中的极小正规子群.则(2)若N是不可解群,则G/N是循环群,N/Φ(N)是非交换单群. (3)如果N是可解的,则G/N(有时是G本身)对于某个素数q是q-幂零群。
A finite group is said to be p-closed, if its Sylow p-subgroup is normal. A minimal non-nilpotent group means that all of its proper subgroups are nilpotent but the group itself is not. O.J. Schmidt showed that this group is soluble and p-nilpotent for some prime p. The present paper generalizes minimal non-nilpotent groups and Schmidt’s result. Consider a group which has s (s ≤ 2) proper non-p-closed subgroups Hi, i = 1, …, s so that for any proper subgroup R of it, if R ≰ Hi, then R is p-closed. Obtain that if such a group G satisfies the condition H1 ≰ H2 and H2 ≰ H1, then (1) H1, H2 are maximal normal subgroups of G and H1 ∩ H2 ≠ 1. Let N be the minimal normal subgroup of G contained in H1 ∩ H2. Then (2) If N is insoluble, then G/N is a cyclic group and N/Φ(N) is a non-abelian simple group. (3) If N is soluble, then G/N (sometimes G itself) is a q-nilpotent group for some prime q.
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