关于哥德巴赫问题的一点注记

<正> 通过文章[1]、[2]、[6]对L-函数零点分布及算术数列中素数分布两问题的研究,在1989年我们证明了:每一个奇数N≥exp(exp(11.503))都能够表示成为三个素数之和。在此我们将对这些结果的论证作一点修改和说明.我们将沿用文[1]、[2]、[6]中的记号。 (一)主要是由于第二作者的疏忽,在文[2]定理的陈述和证明中出现了一些缺陷.这就是在应用文[2]的引理10来证明定理时,在文[2]的“三、定理的证明”(第857—858     

一个无正则条件下一般约束最优化问题的信赖域算法的收敛性

本文我们对[1]的算法给出一个修正并在无正则条件下对这一算法给出了收敛性分析，与[1]不同，我们不需要(SBSQ)约束条件。因此本文的结果是[1]的结果的推广和加强。     

二个无理分式不等式的统一恒等式构造

不等式①和②结构相同，但不等号反向，我们必然思考这样一个问题：能否统一证明不等式①和②？文献[2]、[3]、[4]能够对比较复杂的分式不等式构造出优美的恒等式，这给我们以启发，经过研究，我们构造出包含不等式①和②的无理分式恒等式，通过该恒等式得到了比不等式①和②更为一般的结论．     

一般随机不动点定理及其应用

在本文中我们得到了一个一般的随机不动点定理,推广了Engl[4,7]和Bocsan[8]的主要结果.这一定理的有用性在于目前由许多作者用特殊方法得到的随机不动点定理[1,4,5-13]均能利用我们的一般定理(定理1和系1,2)得到,最后给出了我们的定理对随机积分和微分方程的应用.     

关于Morse引理的推广

Morse Lemma是奇点理论中一个极为重要的结论。[1]的作者称其文中的定理1和定理2是Morse Lemma的推广。为此我们愿就[1]中的几个问题与[1]的作者商榷。     

线性两点边值问题的迭加原理与不变嵌入方法(Ⅱ)

在[1]中,对线性两点边值问题,推广了[2一4]中所提出的不变嵌入算法。本文从理论上对[1]中所述方法作进一步讨论並指明[1]中所述的基本假定H在具体计算中的实现方法。最后通过一些实例计算说明我们的方法有较高的效率。为了方便,不加申明地我们将使用[1]中的记号。     

格值模型论中的省略型定理

<正> 我们在[2][3]开始的工作中,对于多值模型论准备作一些初步考查.我们已经讨论了2-值模型论中超积基本定理及紧致性定理在多值时的初步推广.本文是这一工作的继续,我们将证明某些值格时的省略型定理.文中有些概念及记号可参看[2]、[3]、[4](但本文的内容与[2]、[3]无关).以下再补充叙述一些与本文有关的概念.     

三角形与三棱锥的一个向量性质的逆定理

文[1]、文[2]、文[3]及文[4]对一个三角形重心向量性质进行拓广，文[5]证明了文[1]的逆定理也成立，文[6]将以上的重心性质进行了再推广得到了两个定理，我们可以将这两个定理加强为以下两个命题，证明类似文[6]在此不再证明．     

关于一个数学建模问题的讨论

讨论引自文献[1]和[2]的一个很有趣的数学建模问题.我们给出一个出乎意料的有趣答案.所作的证明也包含一定的技巧.     

试用数学思想方法讨论研究逻辑问题——中学数学教学中若干有争议的逻辑问题辨析

文[1]、文[2]和文[3]等文章确实指出了我们在教学中经常遇到的一些有争议的逻辑问题,而且指出并纠正了一部分逻辑思维方法上的严重错误.……     

Global exponential stability of a class of retarded impulsive differential equations with applications

This paper studies the dynamics of a class of retarded impulsive differential equations (IDE), which generalizes the delayed cellular neural networks (DCNN), delayed bidirectional associative memory (BAM) neural networks and some population growth models. Some sufficient criteria are obtained for the existence and global exponential stability of a unique equilibrium. When the impulsive jumps are absent, our results reduce to its corresponding results for the non-impulsive systems. The approaches are based on Banach’s fixed point theorem, matrix theory and its spectral theory. Due to this method, our results generalize and improve many previous known results such as [3], [5], [6], [9], [17], [18], [23], [32], [38], [43], [51], [52]. Some examples are also included to illustrate the feasibility and effectiveness of the results obtained.     

Some convergence theorems of non-implicit iteration process with errors for a finite families of I-asymptotically nonexpansive mappings

The purpose of this paper is to study the weak and strong convergence of non-implicit iteration process with errors to a common fixed point for a finite family of I-asymptotically quasi-nonexpansive mappings in Banach spaces. The results presented in this paper extend and improve the corresponding results of several authors [1], [2], [7], [8], [9], [10], [11], [12], [13], [14], [17], [19], [22], [23], [24], [25], [26], [27], [28] and [29].     

On strong convergence in real Banach spaces obtained by dropping the Lipshitz condition

We consider an implicit iterative process for two finite families of mappings in a real Banach space and prove strong convergence results without using the Lipschitz condition on mappings. Our results mainly improve and extend the recent results of Chang et al. (2001, 2009, 2007) [1], [2], [3], Cho et al. (2005) [4], Gu (2008) [14], Ofoedu (2006) [9], Schu (1991) [13], Zeng (2003, 2005) [20], [21], and Qin et al. (2008) [11], [12].     

The matching theorems in G-convex spaces with applications

The purpose of this paper is to establish some new matching theorems in G-convex spaces and, as applications, to obtain some new fixed point theorems, section theorems and a minimax theorem in G-convex spaces. The results presented in this paper improve and generalize the corresponding results in [1], [2], [3], [4], [5], [7], [8], [9], [10], [11] and [12].     

随机泛函分析中可交换映象的随机不动点定理

随机不动点定理在随机泛函分析中是一重要问题.在可分完备的度量空间中的随机不动点定理Bharucha-Reid,王梓坤,?pa?ek,Han?,Itoh及作者等都曾进行过讨论(见[1-5,15-20,21]).在本文中我们对概率分析中可交换映象的随机不动点定理得出了几个新的结果,它推广了前述诸人工作中某些重要结果.在确定性情形也推广了Jungck[6,7,8],Das,Naik[9],Rhoades[10],及Ciric[11]的结果.     

Sperner's theorem on maximal-sized antichains and its generalization

This paper generalizes previous work by Sperner [8], Erdös [2], Kleitman [5], Katona [3], DeBruijn et al. [1], and Schönheim [7]. Such generalization not only leads to simple proofs of known results but also sharpens some of these results.     

Gronwall-Bellman type nonlinear delay integral inequalities on time scales

In this paper, some Gronwall-Bellman type nonlinear delay integral inequalities on time scales are established, which provide a handy tool in deriving boundedness of solutions of certain delay dynamic equations on time scales. Our results generalize some of the main results in Lipovan (2006) [1], Pachpatte (2000) [2], Ferreira and Torres (2009) [3], Zhang and Meng (2008) [4], Cheung and Ren (2006) [5], Kim (2009) [6], and some of our results unify continuous and discrete analysis in the literature.     

Uniqueness and value-sharing of differential polynomials of meromorphic functions

In this paper, we investigate uniqueness problems of meromorphic functions concerning differential polynomials sharing non-zero finite value and give some results. As particular cases of our results we deduce several earlier results of Fang and Hong (2001) [2], Fang and Hua (1996) [1], Lin and Yi (2004) [5], Yang and Hua (1997) [6] and others.     

B值随机元和的完全收敛性

在B值随机元随机有界于一非负随机变量的情况下．讨论了B值独立随机元序列非随机足标和的完全收敛性，作为应用，得到了随机足标和完全收敛性的相应结果，将[5]中的一些结果推广到B值独立随机无情形，同时使[3]（d=1），[4]，[6]的相应结果成为特例．     

Uniqueness results of meromorphic functions whose derivatives share four small functions

We prove an oscillation theorem of two meromorphic functions whose derivatives share four values IM. From this we obtain some uniqueness theorems, which improve the corresponding results given by Yang [16] and Qiu [10], and supplement results given by Nevanlinna [9] and Gundersen [3, 4]. Some examples are provided to show that the results in this paper are best possible.