共查询到19条相似文献,搜索用时 46 毫秒
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证明了非幂零极大子群共轭类类数等于2的有限群必可解,并给出了非幂零极大子群同阶类类数等于2的非可解群的等价刻画. 相似文献
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殷霞 《数学的实践与认识》2012,42(5):164-169
研究了有限群的结构问题,利用子群c-半置换和完全c-半置换的定义和性质,通过对有限群sylow子群的2-极大子群的研究,获得了有限群幂零、p-幂零的充分条件和另外两个决定群结构的充要条件. 相似文献
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每个极小子群均正规的有限群称为PN-群,本文给出所有偶阶二次极大子群都是PN-群的有限群的一个完全分类。 相似文献
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众所周知,有限群的两个幂零子群的积不一定是幂零的.本文研究了Engel条件对两个幂零子群的影响,得到两个幂零子群的积为幂零群的几个充分条件。 相似文献
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二次极大子群中2阶及4阶循环子群拟中心的有限群 总被引:1,自引:0,他引:1
本文讨论2阶及4阶循环子群对群结构的影响.证明二次极大子群中2阶及4阶循环子群拟中心的有限群G同构于下列群之一:(1)G为2-闭群;(2)G为2-幂零群;(3)G≌S,;(4)G=PQ.其中P为2^4阶广义四元数群,Q≌C3;(5)G≌A5或SL(2,5). 相似文献
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有限群极大子群的θ-子群偶 总被引:21,自引:0,他引:21
N.P.Mukherjee和 P.Bhattacharya在“On theta pairs for a maximal sub-group”(Proc.Amer.Math.Soc,Vl09N3(1990))一文中定义了有限群的极大子群的θ-子群偶概念,研究了极大子群的极大θ-子群偶对群结构的影响,得到了一系列结果.本文在进一步探究θ-子群偶性质的基础上,对该文中一系列主要结果作出了本质性的改进,并给出了可解性、幂零性的一些新刻划. 相似文献
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关于有限群的$CAP$-嵌入子群 总被引:1,自引:0,他引:1
A subgroup H of a finite group G is said to be CAP-embedded subgroup of G if, for each prime p dividing the order of H, there exists a CAP-subgroup K of G such that a Sylow p-subgroup of H is also a Sylow p-subgroup of K. In this paper some new results are obtained based on the assumption that some subgroups of prime power order have the CAP-embedded property in the group. 相似文献
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关于有限群的S-半置换子群 总被引:1,自引:0,他引:1
Let d be the smallest generator number of a finite p-group P and let Md(P) = {P1,...,Pd} be a set of maximal subgroups of P such that ∩di=1 Pi = Φ(P). In this paper, we study the structure of a finite group G under the assumption that every member in Md(Gp) is S-semipermutable in G for each prime divisor p of |G| and a Sylow p-subgroup Gp of G. 相似文献
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Let A be a subgroup of a group G and X a nonempty subset of G. A is said to be X-semipermutable in G if A has a supplement T in G such that A is X-permutable with every subgroup of T. In this paper, we try to use the X-semipermutability of some subgroups to characterize the structure of finite groups. 相似文献
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Jiakuan Lu 《代数通讯》2013,41(10):3726-3732
A subgroup H of a finite group G is called a QTI-subgroup if C G (x) ≤ N G (H) for any 1 ≠ x ∈ H. In this article, the finite groups all of whose second maximal subgroup are QTI-subgroups are classified. 相似文献
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二次极大子群中2阶及4阶循环子群拟正规的有限群 总被引:2,自引:0,他引:2
本文讨论2阶及4阶循环子群对群结构的影响.主要结果是下述定理:如果有限群G满足标题的条件,那么下列情形之一成立:(1)G有正规Sylow 2-子群;(2) G为 2-幂零;(3) G ≌ S4;(4) G=PQ,其中 P为阶 24广义四元数群, Q为 3阶循环群;(5) G ≌ A5或 SL(2,5). 相似文献
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Let P be a Sylow p-subgroup of a group G with the smallest generator number d,where p is a prime.Denote by M_d(P) = {P_1,P_(2,...,)P_d} a set of maximal subgroups of P such that φ(P) = ∩_(n=1)~dP_n.In this paper,we investigate the structure of a finite group G under the assumption that the maximal subgroups in M_d(P) are weakly s-permutably embedded in G,some interesting results are obtained which generalize some recent results.Finally,we give some further results in terms of weakly s-permutably embedded subgroups. 相似文献
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设$H$是有限群$G$的一个子群,若对任意$g\in G$, $H\cap H^g=1$或者$H$,则称$H$为TI-子群. 设$G$是一个所有二极大子群为TI-子群的有限群,本文证明了$G$的每个类保持Coleman自同构是内自同构. 作为本结果的一个直接推论,得到了这样的群$G$有正规化子性质. 相似文献
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In this paper, we investigate the structure of the groups whose nontrivial normal subgroups have order two. Some properties of this kind of groups are obtained. 相似文献