Menger概率n-度量空间中的不动点定理

引进了概率ｎ－度量空间,并将文「１」、「２」的某些主要结果拓广至Ｍｅｎｇｅｒ概率ｎ－度量空间。     

微分形式的亚椭圆性

本文研究了光滑流形上微分形式的亚椭圆性,利用遍历平均的方法,得到了二维环面上变系数1-形式是亚椭圆的充要条件.     

NUMERICAL SOLUTION OF THE SPACE FRACTIONAL DIFFERENTIAL EQUATION

In this paper, a space fractional differential equation is considered. The equation is obtained from the parabolic equation containing advection, diffusion and reaction terms by replacing the second order derivative in space by a fractional derivative in space of order. An implicit finite difference approximation for this equation is presented. The stability and convergence of the finite difference approximation are proved. A fractional-order method of lines is also presented. Finally, some numerical results are given.     

RIGIDITY THEOREMS OF COMPLETE K?HLER-EINSTEIN MANIFOLDS AND COMPLEX SPACE FORMS

We concentrate on using the traceless Ricci tensor and the Bochner curvature tensor to study the rigidity problems for complete K?hler manifolds. We derive some elliptic differential inequalities from Weitzenb?ck formulas for the traceless Ricci tensor of K?hler manifolds with constant scalar curvature and the Bochner tensor of K?hler-Einstein manifolds respectively. Using elliptic estimates and maximum principle, several L~p and L~∞ pinching results are established to characterize K?hler-Einstein manifolds among K?hler manifolds with constant scalar curvature and complex space forms among K?hler-Einstein manifolds.Our results can be regarded as a complex analogues to the rigidity results for Riemannian manifolds. Moreover, our main results especially establish the rigidity theorems for complete noncompact K?hler manifolds and noncompact K?hler-Einstein manifolds under some pointwise pinching conditions or global integral pinching conditions. To the best of our knowledge,these kinds of results have not been reported.     

预拓扑空间中的KKM型定理

本文研究了预拓扑空间中的KKM型定理.利用定义预有限连续空间及预FC-KKM映象类,获得了预FC-空间中的几种类型的KKM型定理.推广了拓扑窄问中几种类型的KKM型定理到预拓扑空间中.     

随机环境中马氏链函数加权和的极限定理

本文研究随机环境中马氏链函数的强极限定理,得到了随机环境中马氏链函数加权和的强收敛性成立的若干充分条件.     

NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATIONS IN C SPACE

1IntroductionItiswellknownthatifsupr(t)=r1相似文献   

RAZUMIKHIN-TYPE THEOREMS OF NEUTRAL STOCHASTIC FUNCTIONAL DIFFERENTIAL EQUATIONS

The stability of stochastic functional differential equation with Markovian switching was studied by several authors,but there was almost no work on the stability of the neutral stochastic functional differential equations with Markovian switching.The aim of this article is to close this gap.The authors establish Razumikhin-type theorem of the neutral stochastic functional differential equations with Markovian switching,and those without Markovian switching.     

空间形式中子流形的象半径与体积增长

本文讨论空间形式中子流形的象半径及体积增长的估计。作为应用,用γ-平均曲率的语言获得了一个紧致超曲面的不存在性定理,它是经典紧致极小超曲面不存在性定理的推广.     

空间形式中子流形的象半径与体积增长

本文讨论空间形式中子流形的象半径及体积增长的估计.作为应用,用r-平均曲率的语言获得了一个紧致超曲面的不存在性定理,它是经典紧致极小超曲面不存在性定理的推广.     

拓扑空间到拓扑空间的集值映射的若干定理和等价命题

集值映射已成为数理经济学的一个基本工具,集值映射在经济理论分析中的应用也推动了集值影射本身在数学上的发展.有关集值映射的特性主要建立在欧试空间或度量空间中,这些性质也可以推广到拓扑空间中,但相应的假设较强,其实际应用范围不太理想.本文在主要条件有所减弱的情况下,在拓扑空间中建立集值映射的有关概念和性质,对给出的一些定理进行证明,且得出其他一些结果,如给出极大定理的另一表述和证明.     

半无界空间上的拟线性抛物型方程解的Blow—up现象

本文研究了拟线性抛物型方程的初边值问题在无界区域D上的全局解存在性问题和局部解的Blow-up问题．利用上、下解方法，并借助Green函数，给出了问题（I）全局解的存在性条件，也给出了局部解发生Blow－up现象的条件     

一类泛函微分方程解的振动定理

给出了二阶泛函数微分方程 x"(t)+f(t,x(g(t,x(t)))=0 t≥ t_0 其中 f(t,u)(?)C([t_0,∞)×R,R),f(t,0)=0 和 g(t,v)(?)C([t_0,∞)×R,R),(?)(t,v)=∞的一切解均为振动的必要条件。     

DIFFERENTIAL OPERATORS OF INFINITE ORDER IN THE SPACE OF RAPIDLY DECREASING SEQUENCES

We consider the space of rapidly decreasing sequences s and the derivative operator D defined on it.The object of this article is to study the equivalence of a differential operator of infinite order;that is φ(D) =sum from k=0 to ∞φ_κD~κ.φ_κ constant numbers an a power of D.D~n,meaning,is there a isomorphism X(from s onto s) such that X_φ(D) = D~nX?.We prove that if φ(D) is equivalent to D~n,then φ(D) is of finite order,in fact a polynomial of degree n.The question of the equivalence of two differential operators of finite order in the space s is addressed too and solved completely when n=1.     

TWO EXISTENCE THEOREMS OF PERIODIC SOLUTIONS FOR DIFFERENTIAL DELAY EQUATIONS

ＴＷＯＥＸＩＳＴＥＮＣＥＴＨＥＯＲＥＭＳＯＦＰＥＲＩＯＤＩＣＳＯＬＵＴＩＯＮＳＦＯＲＤＩＦＦＥＲＥＮＴＩＡＬＤＥＬＡＹＥＱＵＡＴＩＯＮＳ￥ＧＥＷＥＩＧＡＯＡｂｓｔｒａｃｔ：Ｔｈｉｓｐａｐｅｒｃｏｒｒｅｃｔｓａｎｄｉｍｐｒｏｖｅｓｔｗｏｔｈｅｏｒｅｍｓ...     

THE KILLING FORMS AND DECOMPOSITION THEOREMS OF LIE SUPERTRIPLE SYSTEMS

In this article, the Killing form of a Lie supertriple system （LSTS） and that of its imbedding Lie superalgebra （LSA） are investigated, and a unique decomposition theorem for a quasiclassical LSTS with trivial center is established by means of the parallel decomposition theorem for a quasiclassical LSA.     

GENERALIZATIONS OF THE SUZUKI AND KANNAN FIXED POINT THEOREMS IN G-CONE METRIC SPACES

In this paper we develop the Banach contraction principle and Kannan fixed point theorem on generalized cone metric spaces.We prove a version of Suzuki and Kannan type generalizations of fixed point theorems in generalized cone metric spaces.     

ON SOLVING PERIODIC BOUNDARY PROBLEM OF SEMILINEAR SYSTEMS WITH A ONE-PARAMETER IMBEDDING

The paper is concerned with solving periodic boundary problem of semilinear systems, which will be differentiably embedded into an one-parameter family of operators. The solution of the systems is then found by continuing the solution curve of operator homotopy. When the Newton-Kantorovich's procedure is applied to the cor     

某些周期微分方程的亚纯解

本文讨论了两类具周期亚纯系数的微分方程(1．2)，(1．3)亚纯解的表示，得到两个Malmqusit 型定理(定理1，定理3)，即方程(1．2)，(1．3)的亚纯解分别是其系数类的子类。     

弱拟正则映射的若干性质

本文应用Ｈｏｄｇｅ分解,得到了弱拟正则映射的逆Ｈ　　ｌｄｅｒ不等式,Ｌｐ可积性与其分量函数的弱单调性结果．