共查询到20条相似文献,搜索用时 15 毫秒
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基于文[1]、文[2]中的模糊S-半置换子群的定义及其相关性质,本文通过构造一种导出链对模糊S-半置换子群可解性进行相关研究,并对可解模糊S-半置子群的同态像与同态原像进行了相关研究。 相似文献
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Scott H. Murray 《代数通讯》2013,41(2):455-459
We demonstrate a relationships between the representation theory of Borel subgroups and parabolic subgroups of general linear groups. In particular, we show that the representations of Borel subgroups could be computed from representations of certain maximal parabolic subgroups. 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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Takashi Okuyama 《代数通讯》2013,41(4):1155-1165
Let G be an arbitrary Abelian group. A subgroup A of G is said to be quasi-purifiable in G if there exists a pure subgroup H of G containing A such that A is almost-dense in H and H/A is torsion. Such a subgroup H is called a “quasi-pure hull” of A in G. We prove that if G is an Abelian group whose maximal torsion subgroup is torsion-complete, then all subgroups A are quasi-purifiable in G and all maximal quasi-pure hulls of A are isomorphic. Every subgroup A of a torsion-complete p-primary group G is contained in a minimal direct summand of G that is a minimal pure torsion-complete subgroup containing A. An Abelian group G is said to be an “ADE decomposable group” if there exist an ADE subgroup K of G and a subgroup T′ of T(G) such that G = K⊕ T′. An Abelian group whose maximal torsion subgroup is torsion-complete is ADE decomposable. Hence direct products of cyclic groups are ADE decomposable groups. 相似文献
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O. V. Solonukha 《Journal of Mathematical Sciences》2005,127(5):2284-2314
Sufficient conditions are given for the existence of solutions of strong parabolic variational inequalities with nonlinear and multi-valued operators. Pseudomonotone operators are used. A new multi-valued analogue of the acute-angle lemma is used for the localization. The theory can be applied to problems with distributed parameters. We also consider conditions for the existence of strong generalized solutions of parabolic equations with unilateral boundary conditions with applications to control problems.__________Translated from Trudy Seminara imeni I. G. Petrovskogo, No. 24, pp. 250–303, 2004. 相似文献
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A subgroup H of a finite group G is said to be “semi-cover-avoiding in G” if there is a chief series of G such that H covers or avoids every chief factor of the chief series. In this article, some new characterizations for finite solvable groups are obtained based on the assumption that some subgroups have semi-cover-avoiding properties in the groups. 相似文献
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We discuss one construction of nonstandard subgroups in the category of Coxeter groups. Two formulae for the growth series
of such a subgroups are given.
As an application we construct a flag simple convex polytope, whose f-polynomial has non-real roots.
Partially supported by a KBN grant 2 P03A 017 25 相似文献
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The qualitative properties of solutions of a Neumann problem for the singular parabolic equation ut = (u^m-1 ux)x (-1 〈 m ≤0) is studied in this paper. It is proved that there exists a unique global smooth solution which depends on the initial value. The large time behavior of the solutions is also discussed. 相似文献
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A supercharacter theory is constructed for the parabolic subgroups of the group GL(n, Fq) with blocks of orders less or equal to two. The author formulated the hypotheses on construction of a supercharacter theory for an arbitrary parabolic subgroup in GL(n, Fq). 相似文献
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V. A. Ustimenko 《Acta Appl Math》1998,52(1-3):223-238
Investigations of homogeneous varieties T=(G:P) of all cosets of finite Coxeter or Chevalley groups G by their maximal parabolic subgroups P had been conducted at the Kalunin seminar at Kiev State University since the 1970s, as were investigations of their corresponding permutation groups, geometries and association schemes.In I. A. Faradev et al. (eds), Investigations in Algebraic Theory of Combinatorial Objects (Kluwer Acad. Publ., 1994), one can find some results on the investigation of noncomplete Galois correspondence between fusion schemes of the orbital scheme for (G,T) and overgroups of (G,T), as well as calculations of the intersectional indices of the Hecke algebra of (G,T). We will discuss additional results on this topic and consider questions related to the following problems: embeddings of varieties (G:P) into the Lie algebra corresponding to Chevalley group G; interpretations of Lie geometries, small Schubert cells, connections between the geometry of G and its associated Weyl geometry in terms of linear algebra, and applications of these problems to calculations performed in Lie geometries and association schemes; constructions of geometric objects arising from Kac–Moody Lie algebras and superalgebras, and applications of these constructions to investigations of graphs of large girth and large size. 相似文献
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For a finite group G, let v(G) denote the number of conjugacy classes of non-normal subgroups of G and vc(G) denote the number of conjugacy classes of non-normal noncyclic subgroups of G. In this paper, we show that every finite group G satisfying v(G) ≤2|π(G)| or vc(G) ≤ |π(G)| is solvable, and for a finite nonsolvable group G, v(G) = 2|π(G)| +1 if and only if G ? A 5. 相似文献
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Dinh Nho Ha 《Mathematische Nachrichten》1995,171(1):177-206
Noncharacteristic Cauchy problems for parabolic equations arc frequently encountered in many areas of heat transfer. These problems are well known to be severely ill-posed. In this paper a solvability criterion for a class of such problems is established. It is proved that a weak solution of a noncharacteristic Cauchy problem for linear parabolic equations in divergence form with coefficients in a Holmgren class 2 in time exists if and only if the Cauchy data arc functions of a Holmgren class 2! A function g(t) defined on (α, β) is said to be of a Holmgren class 2, if g ?C∞ (α, β) and for all nonnegative integers n there exist positive constants c and s such that |g(n)| < csn(2n)!. 相似文献