LF拓扑空间的正则闭分离性

利用正则闭集概念在LF拓扑空间中引入了正则闭分离性Ti^rc（i=-1，O），次To^rc概念，给出了它们的刻画，证明了正则闭Ti^rc（i=-1，0）分离性、次To^rc分离性为拓扑性质，在LF拓扑空间的半正则化中Ti^rc分离性与Ti分离性是等价的。     

L-fuzzy拓扑空间中的包含式正则分离性

本文首先在一般L-fuzzy拓扑空间中引入了包含式正则分离性的概念.其次将包含式正则分离性与点式正则分离性及正则分离性作了比较,讨论了它们之间的相互蕴含关系.最后说明了包含式正则分离性与包含式正规分离性及包含式完全正则分离性之间的协调性.     

T21／2LF拓扑空间和ST21／2LF拓扑空间的分离性

定义ST21／2LF拓扑空间的分离性,证明了T21／2LF拓扑空间,ST21／2LF拓扑空间与LF拓扑空间的其他几个分离性是协调的,并考察它们的性质。     

LF拓扑空间的rT-分离性

在利用r闭远域概念引入了rT-分离性的基础上讨论了该分离性的一些等价刻画和基本性质(L-好的推广、LF-r拓扑性质及遗传性等).结果表明它们保持了LF拓扑空间中的T-分离性的主要结果,是LF拓扑空间中的T-分离性的推广.     

极小正则 LF 拓扑空间

本文引入极小正则LF拓扑空间的概念,给出了构造弱于已知正则LF拓扑的正则LF拓扑的一般方法.此外,得出了正则LF拓扑成为极小正则LF拓扑的条件.     

T_(5/2)LF拓扑空间和S_(5/2)LF拓扑空间的分离性

定义 ST2 12 L F拓扑空间的分离性 ,证明 T2 12 LF拓扑空间、ST2 12 LF拓扑空间与 LF拓扑空间的其他几个分离性是协调的 ,并考察它们的性质。     

拓扑分子格的σ分离性

在拓扑分子格理论中,利用有序闭远域概念引入σi分离性(i=-1,0,1,2,3,4)、σ正则分离性和σ正规分离性等概念.较为系统地研究了这些概念的特征性质、遗传性质和拓扑性质.讨论了σ分离性与Ui-分离性和Ti-分离性之间的相互关系.     

LF拓扑空间的次E_sT_i(i=1,2)分离性

为了进一步研究LF拓扑空间中的分离性,利用Es远域在LF拓扑空间中定义次E_sT_i(i=1,2)分离性的概念,并讨论它们的一些基本性质(如遗传性,可乘性,弱Es同胚不变性等),从而得出了范畴CCEsT2是具有积与上积的范畴。此外,刻画了范畴CCE_sT_i(i=1,2)中的严格满态射和严格单态射,从而得出了范畴CCE_sT_i(i=1,2)是范畴CLTop的满反射子范畴。     

基于滤子收敛的分离公理的等价刻画

在拓扑空间中,滤子是用来描述收敛的主要工具之一,也是用来研究收敛空间的主要工具。本文对拓扑空间中的滤子,定义了三个新的滤子■,*和△,并用它们刻画了拓扑空间中的T0,T1,T2,正则,完全正则和正规等分离性。     

LF拓扑空间的E_sT-分离性

为了进一步研究LF拓扑空间的分离性,利用E_s远域将LF拓扑空间的T-分离性的概念进行了推广,即得E_sT-分离性.给出了E_sT-分离性的一些等价刻画,讨论了E_sT-分离性之间的联系及其基本性质(如L-好的推广,E_s同胚不变性等),最后得出了T-分离性与E_sT-分离性的关系.     

拓扑空间关于子基的分离性

在粗糙集理论研究中,覆盖方法的应用越来越受到重视,其中拓扑空间的子集关于子基的内部和闭包两个概念尤为重要.本文在由它们导人的关于子基的开集,闭集的基础上,给出了拓扑空间关于子基的分离性概念,并研究它们的性质,得到分离性公理定义的一般拓扑空间的进一步分类.     

Some Normality-Type Properties,Topological Products,and Classes of Continuous Mappings

Some properties generalizing the normality separation axiom and their behavior under basic topological operations and continuous mappings are discussed. One of the general problems considered in the paper concerns the deduction of “nice” topological properties of spaces from generalized normality of certain topological products, their subspaces, and other related structures; in particular, extensions of the well-known theorems of Katetov and Tamano are suggested. __________ Translated from Fundamentalnaya i Prikladnaya Matematika, Vol. 9, No. 2, pp. 205–238, 2003.     

Fell topology on the space of functions with closed graph

LetX andY beT ₁ topological spaces andG(X, Y) the space of all functions with closed graph. Conditions under which the Fell topology and the weak Fell topology coincide onG(X,Y) are given. Relations between the convergence in the Fell topologyτF, Kuratowski and continuous convergence are studied too. Characterizations of a topological spaceX by separation axioms of (G(X, R), τF) and topological properties of (G(X, R), τF) are investigated.     

Coincidence and fixed points for maps on topological spaces

The existence of coincidence and fixed points for continuous mappings on pseudo-compact completely regular topological spaces are proved. Our results are different from known, or are generalizations, extensions and improvements of the corresponding results due to Jungck, Liu and Liu et al. Further, the Edelstein result for contractive mappings is extended to Hausdorff (not necessarily completely regular) topological spaces and generalized in many aspects. An example is presented to show that our results are genuine generalizations of the Edelstein result.     

正则带的半格结构

Petrich解决了一般带的构造定理（见[1]或[2]），在此基础上，我们将证明正则带（满足等式axya=axaya的带）的一些特征，并给出一个带为正则带或右似正规带（满足等式xya=xaya的带）的充分必要条件，这些结果是Yamada和Kimura的关于正规带（满足等式axya=ayxa的带）的结果的推广，正规带被他们描述为矩形带的强半格（见[1]或[3]）。     

对称拓扑分子格的直和

文章给出了对称拓扑分子格的直和概念,给出了拓扑分子格的直和的特征,证明了对称拓扑分子格的分离性Ti(i=-1,0,1,2)及可数性CⅠ,CⅡ是可和性质.     

Topological regular variation: III. Regular variation

This paper extends the topological theory of regular variation of the slowly varying case of Bingham and Ostaszewski (2010) [5] to the regularly varying functions between metric groups, viewed as normed groups (see also Bingham and Ostaszewski (2010) [6]). This employs the language of topological dynamics, especially flows and cocycles. In particular we show that regularly varying functions obey the chain rule and in the non-commutative context we characterize pairs of regularly varying functions whose product is regularly varying. The latter requires the use of a ‘differential modulus’ akin to the modulus of Haar integration.     

I-fuzzy拓扑空间的次分离公理

在I-fuzzy拓扑空间中引入次T1和次T2分离公理,新的分离公理具有预期好的性质,如:具有遗传性和可乘性,在次T2空间中分子网收敛唯一等。初步讨论次分离公理与其它分离公理的关系。     

Compactification with Respect to a Generalized-net Convergence on Constructs

We introduce and deal with a convergence on (objects of) constructs which is expressed in terms of generalized nets. The generalized nets used are obtained from the usual nets by replacing the construct of directed sets and cofinal maps by an arbitrary construct. Convergence separation and convergence compactness are then introduced in a natural way. We study the convergence compactness and compactification and show that they behave in much the same way as the compactness and compactification of topological spaces.