关于复差分微分理论的若干结果

本文主要利用差分的Nevanlinna理论,研究了几种不同类型的复差分微分多项式的零点情况,推广了微分多项式理论中的一些经典结果,同时也推广了部分差分多项式的结果.另外,本文还得到了某些差分微分方程解的存在性.     

关于积和式的几个等式

本文主要讨论积和式几个等式,并得到部分结果.     

时频分析与算子代数

Gabor分析中几个著名的基本定理(如对偶原理和稠密性定理)与群表示和算子代数理论密切相连.尽管时频分析与算子代数之间的某些联系是Jon von Neumann于1930年代建立的,可是它们在近期得到广泛研究,这主要应归于小波/Gabor理论或更一般的框架理论近二十年的发展.本文将讨论过去几年得到的一些主要结果,同时也给出一些新的结果、解释和问题,我们主要考虑来源于时频分析并能反映与群表示理论存在内在联系的那些结果.特别地,针对群表示的时频分析,将详细说明抽象的对偶原理及其与算子代数理论中几个公开问题的联系.     

向量优化中ε-真有效解的非线性标量化性质

利用Gplert等提出的非线性标量化函数给出了向量优化中ε-真有效解的一个非线性标量化性质,并提出几个例子对主要结果进行了解释.     

单调算子理论与分裂算法

本文主要回顾了单调算子理论与分裂算法的基本概念和结果,重点介绍Forward-Backward分裂算法和Douglas-Rachford分裂算法的收敛性理论及应用.同时,也介绍了这些方法处理非凸优化问题的最新进展以及一些前沿和热点问题.最后提出了几个未来可以继续研究的方向.     

一类带反馈控制的非自治离散竞争系统概周期解的动力学性质

本文利用差分方程的比较原理以及构造国合适的Lyapunov函数,讨论了一类带有反馈控制的非自治离散竞争系统的持久性和概周期解,给出了存在正概周期解的几个充分条件.最后给出一个数值例子验证了本文主要结果的有效性.     

向量优化中\varepsilon-真有效解的非线性标量化性质

利用G\"{o}pfert等提出的非线性标量化函数给出了向量优化中\varepsilon-真有效解的一个非线性标量化性质, 并提出几个例子对主要结果进行了解释.     

弱Hopf作用的余挠维数和FP投射维数

令H是有限维弱Hopf代数,A是H-模代数.本文主要讨论了A#H和A的余挠维数以及FP投射维数的关系.作为主要结果的应用我们给出了几个使得LCD(A#H)=LCD(A)和LFPD(A#H)=LFPD(A)的条件.     

Cleft扩张的余挠维数

众所周知,如果扩张AB是cleft的,则B≌A#_σH.本文主要讨论B和A的余挠维数之间的关系,得出结论LCD(B)■LCD(A)+RD(H),从而推广了群环余挠维数的结论.作为主要结果的应用,还给出了几个使得LCD(B)=LCD(A)的条件.     

关于"非奇异H-矩阵的实用新判定"的改进研究

利用新的正对角因子,得出几个非奇异H-矩阵新的判定条件,改进和推广了"非奇异H-矩阵的实用新判定"一文的主要结果,并用数值例子说明了结论的有效性.     

多复变数的二阶微分从属

在文[1－2]的基础上讨论了多复变数中的二阶微分从属，取得了一些结果。这些结果是文[1-5]中的一些结果的推广。     

多复变数的一阶微分从属

本讨论了多复变函中的一阶微分从属,取得了一些结果,这些结果在单叶函数或映照中有一定的应用。     

非线性脉冲中立型双曲方程的振动性

讨论非线性时滞脉冲中立型双曲方程的振动性质,利用平均值方法以及泛函微分不等式获得了该类方程在一类非线性边值条件下所有解振动的充分判据.结果表明,振动是由滞量和脉冲引起的.     

Common fixed point results for noncommuting mappings without continuity in generalized metric spaces

Using the setting of a generalized metric space, a fixed point theorem is proved for one map, and several fixed point theorems are proved for two maps. These results generalize several well known comparable results in the literature.     

On several results about convex set functions

In 1979, in an interesting paper, R.J. Morris introduced the notion of convex set function defined on an atomless finite measure space. After a short period this notion, as well as generalizations of it, began to be studied in several papers. The aim was to obtain results similar to those known for usual convex (or generalized convex) functions. Unfortunately several notions are ambiguous and the arguments used in the proofs of several results are not clear or not correct. In this way there were stated even false results. The aim of this paper is to point out that using some simple ideas it is possible, on one hand, to deduce the correct results by means of convex analysis and, on the other hand, to emphasize the reasons for which there are problems with other results.     

Second-order optimality conditions using approximations for nonsmooth vector optimization problems under inclusion constraints

Second-order necessary conditions and sufficient conditions for optimality in nonsmooth vector optimization problems with inclusion constraints are established. We use approximations as generalized derivatives and avoid even continuity assumptions. Convexity conditions are not imposed explicitly. Not all approximations in use are required to be bounded. The results improve or include several recent existing ones. Examples are provided to show that our theorems are easily applied in situations where several known results do not work.     

Elementary variational approach to zero-free solutions of a nonlinear eigenvalue problem

A variational approach is employed for obtaining zero-free solutions of a nonlinear eigenvalue problem that appears in several recent studies. Our proofs are elementary but our results are sharp and yield corrections to several existing assertions in the literature.     

“向量极值问题的最优性条件”一文的注记

本文给出了文［１］中的几个主要结果（即［１］中的推论２，定理４，定理６及定理７）的反例，进而更正了有关结果     

与积分有关的一个极限及其应用

将崔尚斌编著的《数学分析教程》(中册)的一个综合习题进行推广,得到求与积分有关的极限的几个实用性结果,并给出多个应用例子.     

Superquadratic functions in several variables

The concept of superquadratic functions in several variables, as a generalization of the same concept in one variable is introduced. Analogous results to results obtained for convex functions in one and several variables are presented. These include refinements of Jensen's inequality and its counterpart, and of Slater-Pe?ari?'s inequality.