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1.
Let G be a finite group. A subgroup H of a group G is said to be c-supplemented in G if there exists a subgroup K of G such that G = HK and H ∩ K ≤ H G , where H G = Core G (H) is the largest normal subgroup of G contained in H. In this article, we investigate the structure of a finite group G under the assumption that subgroups of prime order are c-supplemented in G. Moreover, we analyze the structure of a group G when the minimal subgroups of the generalized Fitting subgroup F?(G) of G are c-supplemented in G through the theory of formations. 相似文献
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利用有限群G的pronormal极小子群和Sylow子群正规化子中的素数阶弱左Engel元素得到了G成为p-幂零群、幂零群和超可解群的一些充分条件,这些结果推广了已知结论。 相似文献
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极小子群对有限群结构的影响 总被引:6,自引:0,他引:6
设G是一个有限群.G的极小子群如何影响群的结构是一个人们感兴趣的问题.在本文中,我们用极小子群的c-正规的条件刻划群G的结构.我们推广了一些已知的结果. 相似文献
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Yanming Wang 《数学学报(英文版)》2000,16(1):63-70
Abstract
Let G be a finite group. The question how the properties of its minimal subgroups influence the structure of G is of considerable interest for some scholars. In this paper we try to use c-normal condition on minimal subgroups to characterize the structure of G. Some previously known results are generalized.
The author is supported in part by NSF of China and NSF of Guangdong Province 相似文献
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Siberian Mathematical Journal - In 1979, Wielandt raised the problem of classifying the $ pi $ -submaximal subgroups in minimal nonsolvable groups. Some solution to this problem is known for the... 相似文献
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《代数通讯》2013,41(10):4807-4816
Abstract A subgroup H of G is said to be c-normal in G if there exists a normal subgroup N of G such that HN = G and H ∩ N ≤ H G = Core(H). We extend the study on the structure of a finite group under the assumption that all maximal or minimal subgroups of the Sylow subgroups of the generalized Fitting subgroup of some normal subgroup of G are c-normal in G. The main theorems we proved in this paper are: Theorem Let ? be a saturated formation containing 𝒰. Suppose that G is a group with a normal subgroup H such that G/H ∈ ?. If all maximal subgroups of any Sylow subgroup of F*(H) are c-normal in G, then G ∈ ?. Theorem Let ? be a saturated formation containing 𝒰. Suppose that G is a group with a normal subgroup H such that G/H ∈ ?. If all minimal subgroups and all cyclic subgroups of F*(H) are c-normal in G, then G ∈ ?. 相似文献
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T. V. Koval' 《Ukrainian Mathematical Journal》2000,52(12):1949-1951
We constructively describe locally graded groups all proper nonmaximal subgroups of which are cyclic or minimal noncyclic. 相似文献
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It is proved that in groups with all subgroups subnormal everynilpotent subgroup is contained in a normal nilpotent subgroup. 相似文献
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Lifang Wang 《代数通讯》2013,41(1):143-149
Let R be a Noetherian algebra over a field k. A formula is given for the Krull dimension of the ring R?k k(X) in terms of the heights of simple modules with large endomorphism rings. 相似文献
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F. de Mari 《Ukrainian Mathematical Journal》2004,56(10):1693-1698
Let G be a Tarski-free group such that the join of all nonmodular subgroups of G is a proper subgroup in G. It is proved that G contains a finite normal subgroup N such that the quotient group G/N has a modular subgroup lattice.__________Published in Ukrains’kyi Matematychnyi Zhurnal, Vol. 56, No. 10, pp. 1419 – 1423, October, 2004. 相似文献
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The structure of groups in which many subgroups have a certain property X has been investigated for several choices of the property X. Groups whose non-normal subgroups satisfy certain finite rank conditions are studied in this article. In particular, a classification of groups in which every subgroup is either normal or polycyclic is given.(Dedicated to Mario Curzio on the occasion of his 70th birthday)1991 Mathematics Subject Classification: 20F16 相似文献
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Francesco de Giovanni Alessio Russo Giovanni Vincenzi 《Mediterranean Journal of Mathematics》2007,4(1):65-71
A subgroup X of a group G is called pronormal-by-finite if there exists a pronormal subgroup Y of G such that Y ≤ X and |X : Y| is finite. The structure of (generalized) soluble groups in which all subgroups are pronormal-by-finite is investigated.
Among other results, it is proved in particular that a finitely generated soluble group with such property is central-by-finite,
provided that it has no infinite dihedral sections. 相似文献
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Guohua Qian 《代数通讯》2013,41(12):5183-5194
Let G be a finite group and M n (G) be the set of n-maximal subgroups of G, where n is an arbitrary given positive integer. Suppose that M n (G) contains a nonidentity member and all members in M n (G) are S-permutable in G. Then any of of the following conditions guarantees the supersolvability of G: (1) M n (G) contains a nonidentity member whose order is not a prime; (2) all nonidentity members in M n (G) are of prime order, and all cyclic members in M n?1(G) of order 4 are S-permutable in G. 相似文献
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OrestD.ARTEMOVYCH 《数学学报(英文版)》2003,19(4):823-828
We characterize non-finitely generated soluble groups with the maximal condition on non-Baer subgroups and prove that a non-Baer soluble group is a ^ˇCernikov group or it has an infinite properly descending series of non-Baer subgroups. 相似文献
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设$H$为有限群$G$的子群且$p$为整除群$G$的阶的素因子. 我们称$H$在$G$中为$c_p$-可补的,如果$G$中存在$H$的包含$H_G$的补子群$T$使得$H\cap T/H_G$为$p''$-群, 其中$H_G$为$H$在$G$中的核. 群$G$ 称$CS_p$-群, 如果$G$的所有$p$-子群都在$G$中$c_p$-可补. 本文,我们刻画具有若干$c_p$-可补$p$-子群的有限群的$p$-可解性和$p$-超可解性. 此外,我们给出$p$-可解群为$CS_p$-群的若干等价条件. 最后, 我们给出两个$CS_p$-群的直积为$CS_p$-群的判别准则. 我们的结果推广了近期的若干结论. 相似文献