共查询到20条相似文献,搜索用时 140 毫秒
1.
巫世权 《数学物理学报(B辑英文版)》1994,(1)
MAXIMUMTREESOFSUBSETSWuShiquan(巫世权)(Inst.ofAppl.Math.,ChieseAcademyofSciences,POBox2734,Beijing100080,China)Abstract:LetXbeaf... 相似文献
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由混合数据构造Jacobi矩阵吕炯兴(南京航空航天大学)ONTHECONSTRUCTIONOFAJACOBIMATRIXFROMMIXEDDATA¥LuTong-xing(NanjingUniversityofAeronauticsandAstron... 相似文献
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ONEXCHANGEALGORITHMFORNONLINEARBESTCHEBYSHEVAPPROXIMATIONWITH LGHCONDITIONXiongGuijing(熊规景);WeiDan(韦旦)(Inst.ofMath.Sci.,Chin.... 相似文献
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FEEDBACKCONTROLOFSINGLE-LINKFLEXIBLEARMSFENGDEXING(冯德兴);ZHANGWEITAO(张维韬)(InstituteofSystemsScience,theChineseAcademyofScience... 相似文献
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RESEARCHANNOUNCEMENTSOnEndohomologyofComplexesofGraphsXieLitong(谢力同)XuBaogang(许宝刚)(InstituteofMathematics,ShandongUniversity... 相似文献
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王现 《Annals of Differential Equations》1996,(4)
GLOBALANALYSISOFACLASSOFCUBICSYSTEMSWangXian(王现)(NanjingUniversity,南京大学,邮编:210093)Abstract:Thepapergivesacompletegolbalphasep... 相似文献
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YE YANQIAN * 《数学年刊B辑(英文版)》1997,(3)
LIMITCYCLESANDBIFURCATIONCURVESFORTHEQUADRATICDIFFERENTIALSYSTEM(II)m=0HAVINGTHREEANTISADDLES(I)YEYANQIANAbstractAsaconti... 相似文献
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章祥荪 《应用数学学报(英文版)》1996,12(1):1-10
ZHANGXIANGSUN(章祥荪)(InstituteofAppliedMathematicstheChineseAcademyofSciences,Beijing100080,China)ReceivedJune18,1994.Thisworki... 相似文献
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COEXISTENCE,PERMANENCE,ANDSTABILITYINATHREESPECIESCOMPETITIONMODEL¥FENGWEI(冯薇)(DepartmentofMathematicalSciences,UnivereityofN... 相似文献
11.
GUO Dachang 《系统科学与数学》2000,13(1)
Let G be a finite group and S a subset of G not containing the identity element 1. We define the Cayley (di)graph X = Cay(G, S) of G with respect to S by V(X) = G,E(X) = {(g, sg) [ g ∈ G, s ∈ S}. A Cayley (di)graph X = Cay(G, S) is called normal if GR A = Aut(X). In this paper we prove that if S = {a, b, c} is a 3-generating subset of G = A5 not containing the identity 1, then X = Cay(G, S) is a normal Cayley digraph. 相似文献
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Chen Dongyang 《数学物理学报(B辑英文版)》2006,26(2)
Let X be a Banach space. If there exists a quotient space of X which is asymptotically isometric to l1, then X contains complemented asymptotically isometric copies of l1. Every infinite dimensional closed subspace of l1 contains a complemented subspace of l1 which is asymptotically isometric to l1. Let X be a separable Banach space such that X* contains asymptotically isometric copies of lp (1 < p <∞). Then there exists a quotient space of X which is asymptotically isometric to lq (1/p 1/q=1). Complementedasymptotically isometric copies of c0 in K(X, Y) and W(X, Y) are discussed. Let X be a Gelfand-Phillips space. If X contains asymptotically isometric copies of c0, it has to contain complemented asymptotically isometric copies of c0. 相似文献
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一个边割被称为圈边割,如果该边割能分离图的两个不同圈.如果一个图有圈边割,称该图为圈边可分离的.一个圈边可分离图G的最小圈边割的阶数被称为圈边连通度,记作cλ(G).定义:ζ(G)=min{w(X)|X导出G的最短圈},其中w(X)为端点分别在X和V(G)-X中的边的数目.如果一个圈边可分离图G使得cλ(G)=ζ(G)成立,称该图是圈边最优的.Tian和Meng在文章[11]以及Yang et al在文章[15]中研究了两种不同的双轨道图的圈边最优性.本文我们将研究具有两个同阶轨道的双轨道图的圈边连通度. 相似文献
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《Quaestiones Mathematicae》2013,36(3):317-329
Abstract We show that every θ-proximity as defined by V.V. Fedor?uk is an f-proximity which we call a k-proximity. Two related f-proximities are introduced, viz. t- and d-proximities. The smallest and largest members of Mf(X, c) for f=k, d and t are characterised where Mf(X, c) is the family of f-proximities compatible with a given closure space (X, c). 相似文献
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Geng Zhibin 《大学数学》1998,(2)
本文研究了Banach空间的弱序列紧性.Banach空间X称为有(w)性质,如果X(X的共轭空间)的每个有界序列有弱收敛子列.我们证明了,如果Banach空间X有(w)性质,那么lp(X)(1≤p<+∞)与c0(X)也有(w)性质. 相似文献
16.
Friedhelm Schwarz 《manuscripta mathematica》1984,49(1):79-89
Let X be a limit space, Y a topological space. We show that c(X,Y), the limitierung of continuous convergence on LIM(X,Y), is topological whenever X is basic locally compact. For regular Y, local compactness of X is sufficient. In both cases, c(X,Y) coincides with the compact-open topology. If X satisfies a certain regularity condition, the fact that c(X,Y) is topological implies, conversely, that X is (basic) locally compact.The author would like to thank S. Weck for some inspiring discussions. 相似文献
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Aequationes mathematicae - Given a subobject-structured category $$\mathcal X$$ , we construct a new category whose objects are the pairs (X, c) where X is an $$\mathcal X$$ -object and c... 相似文献
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本文研究了度量空间X到实直线R上的连续函数空间C(X,R)上的Cauchy收敛拓扑Tc.u,点态收敛拓扑Tp.u,紧开拓扑Tk和一致收敛拓扑Tu相等的等价条件.利用Cauchy覆盖得到了(C(X,R),Tc.u)的特征与X的Cauchy覆盖数相等的一个对偶定理,获得了(C(X,R),Tc.u)可度量化当且仅当(C(X,R),Tc.u)是第一可数的当且仅当X具有可数Cauchy覆盖数,肯定地回答了Michael H Clapp等在文献[1]中提到的问题. 相似文献
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设E是一个A rch im edean R iesz空间,a∈E,Φ≠A E,则有如下的两个结论:1)由a生成的a-拓扑空间E是一个H ausdorff空间;2)若以下条件之一成立,则由A生成的A-拓扑空间E是一个H ausdorff空间:(a)子集{a:a∈A}有上界;(b)E具有强单位元;(c)若E=C(X),其中X是一个局部紧H ausdorff空间. 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1998,326(4):477-482
In this Note, we are interested in quadratic fibered polynomials which are skew products of the kind Pc : X × C → X × C, Pc(x, z) = (ƒ(x),z2 + c(x)), where X is a compact set, ƒ is a continuous map from X into X, and c is a continuous complex valued function on X considered as a parameter. We construct a compact connected configuration space which gives a combinatorial model of a subset of the parameters space. Then, we explain in which way an abstract configuration can be realized by a quadratic fibered polynomial. 相似文献