类凸向量均衡问题弱有效解集的连通性

在拓扑线性空间中研究由关于第一个变量是弧类凹、关于第二个变量是类凸的映射所决定的向量均衡问题.在一定的紧性、凸性、与半连续性的条件下,给出了这类向量均衡问题弱有效解的存在性定理.利用向量均衡问题弱有效解的标量化的结果,得到了这类向量均衡问题弱有效解集的连通性结果.     

A HOPF INDEX THEOREM FOR A REAL VECTOR BUNDLE

The authors generalize the works in [5] and [6] to prove a Hopf index theorem associated to a smooth section of a real vector bundle with non-isolated zero points.     

取值于Banach空间随机测度的收敛性

本文讨论取位于Ｂａｎａｃｈ空间的对称、独立和可控的随机测度的收敛性，Ｖｉｔａｌｉ－ＨａｈｎＳａｋｅ定理，Ｓｋｏｒｏｋｈｏｄ定理以及由Ｈｏｆｆｍａｎ－Ｊｏｒｇｅｎｓｅｎ－Ｐｉｓｉｅｒ提出的关于这种测度的中心极限定理．     

脉冲发展方程初值问题的正解

This paper deals with the existence of e-positive mild solutions（see Definition 1）for the initial value problem of impulsive evolution equation with noncompact semigroup u（t）＋ Au（t）= f（t,u（t））,t ∈ [0,＋∞）,t = tk,u-t=tk = Ik（u（tk））,k = 1,2,...,u（0）= x0 in an ordered Banach space E.By using operator semigroup theory and monotonic iterative technique,without any hypothesis on the impulsive functions,an existence result of e-positive mild solutions is obtained under weaker measure of noncompactness condition on nonlinearity of f.Particularly,an existence result without using measure of noncompaceness condition is presented in ordered and weakly sequentially complete Banach spaces,which is very convenient for application.An example is given to illustrate that our results are more valuable.     

Fuzzy集的退化锥和关于闭性的几个充分条件

本文对Fuzzy集引进退化锥、后退锥、投影锥等概念,并利用它们建立了关于Fuzzy集闭性的几个充分性条件。这些结果对于讨论具有控制锥的Fuzzy多目标规划是有用的。     

关于弱交换PO—半群中的一个问题

本文引入弱交换ｐｏ－半群的概论２，研究这类半群到Ａｒｃｈｉｍｅｄｅａｎ子半群的半格分解，得到了这半群类似于具平凡序的弱交换半群的一个特征，由此在更一般的情形下回答了Ｋｅｈａｙｏｐｕｌｕ在「１」中提出的一个问题，并作为推论得到弱交换ｐｏｅ－半群和具平凡序的弱交换半群的已知结果。     

Hamiltonian图和弱Ore条件

本文用弱 Ore条件和 NC2去研究 Hamiltonian图 ,得到深刻的结果 ,它们改进和统一文献 [1 ]至 [5 ]中熟知的一些著名结果 .     

Weak convergence theorems for strict pseudo-contractions in Banach spaces

In this paper, it is shown that there is a gap in the paper [Chidume, C. E., Shahzad, N.: Weak convergence theorems for a finite family of strict pseudo-contractions. Nonlinear Anal., 72, 1257–1265(2010)], consequently, the main results of the paper do not hold in uniformly smooth Banach spaces. Meanwhile, it is also shown that the main results(Lemma 3.4, Theorems 3.5–3.6, 3.8–3.9) in the paper [Cholamjiak, P., Suantai, S.: Weak convergence theorems for a countable family of strict pseudo-contractions in Banach spaces. Fixed Point Theory Appl., 2010, Article ID 632137, 16 pages(2010)] do not hold in Lpfor p 3. Finally, some modified results are presented in the setting of uniformly smooth and uniformly convex Banach spaces which include Lpfor p ≥ 2 as special cases. Furthermore, our arguments are also different from the ones given by the authors above.     

有限个李普希兹伪压缩映射近迫点序列的收敛性

研究了Banach空间中有限个李普希兹伪压缩映射近迫点序列的收敛性问题,此结果推广了以前的结论.     

集值向量均衡问题的必要性条件

在Banach空间中,借助于Clarke意义下的上导数概念给出了集值向量均衡问题有效解、弱有效解、Henig有效解以及全局有效解的必要性条件;在Asplund空间中,借助于Mordukhovich意义下极限上导数概念,在不具任何凸性条件下给出了具约束条件的集值向量均衡问题有效解、弱有效解、Henig有效解以及全局有效解的必要性条件。