诱导的I-fuzzy拓扑生成序空间

本文研究了模糊拓扑生成序空间与其诱导的I-fuzzy拓扑生成序空间之间的关系.利用三种Lowen映射内在关联的方法,引入了三种I-fuzzy拓扑生成序空间,建立了诱导的I-fuzzy拓扑生成序空间理论.获得了诱导的I-fuzzy拓扑与诱导的I-fuzzy拓扑生成序之间的从属关系.     

关于L-保序算子空间

借助ω-连通集,在L-保序算子空间中引入s-(ω1,ω2)-连续序同态和(ω1,ω2)-半连通序同态以及ω-半局部连通空间的概念,讨论了这两种序同态与(ω1,ω2)-连续序同态之间的关系;并关于s-(ω1,ω2)-连续序同态给出了ω-半局部连通空间的特征刻画。     

(u,02)-广义次似凸映射的择一定理及其对向量优化的应用

在序线性拓扑空间中,引入（u,02）-广义次似凸映射,建立了（u,02）-广义次似凸映射的一个择一定理.最后,利用此定理,在序线性拓扑空间中得到了带广义不等式约束的向量极值问题的最优性必要条件和充分条件.     

伪轨和拓扑压

本文证明了紧度量空间上连续自映射的拓扑压可分别用分离的伪轨集及分离的周期协轨集予以描述．作为应用，得到了具有跟踪性的可扩系统的拓扑压与其周期点之间的明确关系式．     

可拓扑生成的L-fuzzy保序算子空间的权、特征及稠密度

在可拓扑生成的L-fuzzy保序算子空间中研究权,特征及稠密度这三种基数函数,讨论它们与相应的生成底空间的ω-权、ω-特征及ω-稠密度的关系。     

半序度量空间与半序Banach空间中一类算子方程的可解性

在L,N都不必连续的情况下,利用半序方法,研究了算子方程Lx=Nx的可解性,得到了该方程在完备度量空间与Banach空间中解的存在性与多解性结果,并将所获结果应用于一个微分-积分方程的周期边值问题.     

圆周上有4周期轨的连续自映射的周期集

讨论了圆周上有4周期轨的连续自映射的周期集.首先按相对共轭以及相对同伦的关系对圆周上所有有4周期轨的连续自映射分类,再利用映射覆盖图来讨论每一类映射的周期集.最后按同伦最小周期集对圆周上所有有4周期轨的连续自映射进行了分类.将此结果与线段上的Sharkovskii定理对比时可以发现,几乎所有圆周上有4周期轨的连续自映射的周期集都是全体自然数集.     

圆周上有4周期轨的连续自映射的周期集

讨论了圆周上有4周期轨的连续自映射的周期集.首先按相对共轭以及相对同伦的关系对圆周上所有有4周期轨的连续自映射分类,再利用映射覆盖图来讨论每一类映射的周期集.最后按同伦最小周期集对圆周上所有有4周期轨的连续自映射进行了分类.将此结果与线段上的Sharkovskii定理对比时可以发现,儿乎所有圆周上有4周期轨的连续自映射的周期集都是全体自然数集.     

R＋（L）值半连续映射与连续d锥

定义L－fuzzy非负扩充实直线R＋（L）与R＋（L）值半连续映射,证明在一个L－core紧的L－fuzzy拓扑空间（L^x,δ）上的R＋（L）值下半连续映射的全体关于点式序,加法运算与数乘运算的构成一个连续d锥,推广了文献[6]中的结果。     

乘积G-空间中周期跟踪性和等度连续的研究

介绍了拓扑群作用下乘积空间中G-周期跟踪性和G-等度连续的概念,利用乘积映射的性质,研究了乘积映射f×g与分映射f和g在这些动力学性质方面的关系,得到如下结果:1)乘积映射f×g具有G-周期跟踪性当且仅当f具有G_1-周期跟踪性,g具有G_2-周期跟踪性;2)乘积映射f×g具有G-等度连续当且仅当f具有G_1-等度连续,g具有G_2-等度连续.这些结论弥补了拓扑群作用下乘积空间中G-周期跟踪性和G-等度连续理论的缺失.     

On topological types of ordered median functions

An ordered median functions is a continuous piecewise-linear function. It is well known that in finite dimensional spaces every continuous piecewise-linear function admits a max-min representation in terms of its linear functions. An explicit representation of an ordered median function in max-min form is given by the authors and will appear in a forthcoming issue of this journal. Based on this representation, we give a topological classification of ordered median functions through their simplicial complex of ascent (resp. descent) cones.     

When is a lots densely orderable?

We obtain sufficient conditions for a linearly ordered topological space (LOTS) to be densely orderable. As a consequence we obtain a characterization of those metrizable LOTS with connected ordered compactifications.     

Completely regular ordered spaces

We present an example of a completely regular ordered space that is not strictly completely regular ordered. Furthermore, we note that a completely regular ordered I-space is strictly completely regular ordered provided that it satisfies at least one of the following three conditions: It is locally compact, it is a C-space, it is a topological lattice.     

Topologies on abelian lattice ordered groups induced by a positive filter and completeness

We consider topologies on an abelian lattice ordered group that are determined by the absolute value and a positive filter. We show that the topological completions of these objects are also determined by the absolute value and a positive filter. We investigate the connection between the topological completion of such objects and the Dedekind–MacNeille completion of the underlying lattice ordered group. We consider the preservation of completeness for such topologies with respect to homomorphisms of lattice ordered groups. Finally, we show that topologies defined in terms of absolute value and a positive filter on the space C(X) of all real-valued continuous functions defined on a completely regular topological space X are always complete.     

The kurzweil construction of an integral in ordered spaces

This paper generalizes the results of papers which deal with the Kurzweil-Henstock construction of an integral in ordered spaces. The definition is given and some limit theorems for the integral of ordered group valued functions defined on a Hausdorff compact topological space T with respect to an ordered group valued measure are proved in this paper.     

Association of probability measures on partially ordered spaces

A notion of association of probability measures on partially ordered (Polish) spaces is introduced and its basic properties are investigated. This generalizes the classical notion of association among random variables, due to Esary, Proschan, and Walkup. The relation between association and monotone stochastic kernels is investigated and a theorem of Jogdeo is generalized. The general theory is applied to stochastic processes with both discrete and continuous time parameter and partially ordered state spaces. Also, an application to mixtures of statistical experiments is included.     

An abstract sub-supersolution method in partially ordered spaces

We present a general framework in which sub-supersolution techniques can be applied. Specifically, we consider a normed vector space endowed with a partial order. This allows us to introduce a notion of sub- and supersolutions relative to an equation driven by operators defined from the space to its topological dual. We provide sufficient conditions to guarantee that the interval determined by an ordered pair of sub-supersolutions contains a solution of the initial problem. We also study existence of extremal positive or negative solutions and location of nodal solutions. Examples of applications to quasilinear boundary value problems are given.     

On totally periodic ω-limit sets in regular continua

Let f be a continuous self-mapping of a compact metric space X, an ω-limit set of f is said to be totally periodic if it is composed of periodic points. We prove that a totally periodic ω-limit set of one-to-one continuous self mapping of regular continuum is finite. In the other hand, we built a continuous self-mapping (not one-to-one) of a dendrite having a totally periodic ω-limit set with unbounded periods.     

A p-theory of ordered normed spaces

We propose a pair of axioms (O.p.1) and (O.p.2) for 1 ≤ p ≤ ∞ and initiate a study of a (matrix) ordered space with a (matrix) norm, in which the (matrix) norm is related to the (matrix) order. We call such a space a (matricially) order smooth p-normed space. The advantage of studying these spaces over L ^p -matricially Riesz normed spaces is that every matricially order smooth ∞-normed space can be order embedded in some C*-algebra. We also study the adjoining of an order unit to a (matricially) order smooth ∞-normed space. As a consequence, we sharpen Arveson’s extension theorem of completely positive maps. Another combination of these axioms yields an order theoretic characterization of the set of real numbers amongst ordered normed linear spaces.     

Van Douwen's problem on 0-dimensional images of ordered compacta

A compact 0-dimensional space has a -separating rank 1 family of clopen sets iff it is the continuous image of a compact 0-dimensional linearly ordered space.