L-Fuzzy θ-良紧空间

引入θ－拓扑和θ－良紧的概念,并对其作了较深刻的研究,主要结果有：（１）θ－良紧是半正则性质和Ｌ好的推广;（２）θ－良紧是弱同胚不变性质;（３）满层θ－良紧空间与θ－良紧空间与θ－良紧空间的积空间是θ－良紧;（４）对于弱艉导空间（Ｌ＾Ｘ〈δ）,它是θ－良紧当且仅当它的底空间（Ｘ,「δ」是θ－紧。     

关于次中紧空间

本文得到如下主要结果：一个空间是次中紧的当且仅当它的每令定向开覆盖有σ-闭包保持闭加细使得它被一切紧子集组成的族所加细；次中紧空间在闭的紧覆盖映射下的象是次中紧的；一个空间是可度量的当且仅当它是次中紧的Moore空间。     

Lω-空间的ωδ-紧性

在Lω-空间中借助βα-ωδ-开覆盖,定义了Lω-空间的ωδ-紧性,ωδ-基与ωδ-子基,并证明了ωδ-紧性被连续的Zadeh型函数所保持,Tychonoff乘积定理也成立.     

Lω-空间的ωδ-紧性

在Lω-空间中借助βα-ωδ-开覆盖,定义了Lω-空间的ωδ-紧性,ωδ-基与ωδ-子基,并证明了ωδ-紧性被连续的Zadeh型函数所保持,Tychonoff乘积定理也成立.     

L-fuzzy拓扑空间中α-开运算及α-紧性

给出了L-fuzzy拓扑空间中L-fuzzyα-开运算的定义.然后借助L-fuzzyα-开运算给出L-fuzzy拓扑空间中L-fuzzyα-紧的定义;其次给出L-拓扑空间中开覆盖及fuzzyα-紧的定义;并分别得到了一些相关性质;最后讨论了L-fuzzy拓扑空间中L-fuzzyα-紧与L-拓扑空间中fuzzyα-紧之间的关系.     

紧黎曼面上一类线丛截面空间的基

对于亏格g≥1的紧Riemann曲面M,本文运用Riemann-Roch定理,证明了其上线丛Lλ(M)的某类截面空间非空集,并利用Theta函数和素形式构造出这类截面空间的一组基．     

强1-星紧空间的性质

探讨强1-星紧与可数紧、feebly紧、伪紧和DFCC之间的关系，给出它在具有分离性（Q）的T1空间类中的特征．     

L-拓扑空间中的α-紧度

借助于格L的蕴涵算子,在L-拓扑空间中引入了模糊集的α-紧度的概念.一个L-模糊集G是α-紧的当且仅当它的α-紧度coma(G)=(T).我们还研究了α-紧度的一系列性质.     

遗传中紧空间与散射分解

本文证明了可数仿紧(中紧、亚紧)空间有类似Junnila的刻画，遗传中紧空间不具有类似Junnila的刻画，并给出了每个散射分解有紧有限的开膨胀的充要条件．     

Affine Spaces within Projective Spaces

We endow the set of complements of a fixed subspace of a projective space with the structure of an affine space, and show that certain lines of such an affine space are affine reguli or cones over affine reguli. Moreover, we apply our concepts to the problem of describing dual spreads. We do not assume that the projective space is finite-dimensional or pappian.     

QCLkR空间与QCLkS空间

引入了QCLkR空间和QCLkS空间的概念,以局部自反原理为工具证明了QCLkR空间和QCLkS空间的对偶关系.利用切片给出了QCLkR空间和QCLkS空间的特征刻画,并讨论了它们与其它凸性和光滑性的关系,所得结果进一步完善了关于Banach空间凸性与光滑性的研究.     

局部强紧空间的Hoare空间与Smyth空间

本文主要讨论局部强紧空间的性质,特别是其Hoare空间和Smyth空间的性质,证明了T_0空间为局部强紧空间的当且仅当其Hoare空间为局部强紧空间,局部强紧空间的Smyth空间为C-空间.对于强局部紧空间,我们有类似的结论.     

Approach Spaces, Limit Tower Spaces, and Probabilistic Convergence Spaces

The category LTS of limit tower spaces is defined and shown to be isomorphic to the category CAP of convergence approach spaces. The full subcategory of LTS determined by the objects satisfying a diagonal axiom due to Cook and Fischer is shown to be isomorphic to the category AP of approach spaces. A family of isomorphisms is also obtained between LTS and certain full subcategories of the category PCS of probabilistic convergence spaces.     

调和H~p空间和混合范数空间

设Ｄ是一具有Ｃ边界的有界区域．本文就Ｄ上的调和Ｈａｒｄｙ空间和调和混合范数空间,建立了若干互相之间的连续嵌入定理．     

p-Banach Spaces and p-Totally Convex Spaces

We introduce the categories Vec _p of p-normed vector spaces, Ban _p of _p -Banach spaces, AC _p of _p -absolutely and TC _p of _p -totally convex spaces (0 < p 1). It will be shown that TC _p (AC _p ) is the Eilenberg–Moore category of Ban _p (Vec _p ). Then congruence relations on TC _p (AC _p )-spaces are studied. There are many differences between TC _p (AC _p )-spaces and totally (absolutely) convex spaces (i.e. p = 1) (Pumplün and Röhrl, 1984, 1985), which will become apparent in Section 4.     

Morrey-Sobolev Spaces on Metric Measure Spaces

In this article, the authors introduce the Newton-Morrey-Sobolev space on a metric measure space (??, d, μ). The embedding of the Newton-Morrey-Sobolev space into the Hölder space is obtained if ?? supports a weak Poincaré inequality and the measure μ is doubling and satisfies a lower bounded condition. Moreover, in the Ahlfors Q-regular case, a Rellich-Kondrachov type embedding theorem is also obtained. Using the Haj?asz gradient, the authors also introduce the Haj?asz-Morrey-Sobolev spaces, and prove that the Newton-Morrey-Sobolev space coincides with the Haj?asz-Morrey-Sobolev space when μ is doubling and ?? supports a weak Poincaré inequality. In particular, on the Euclidean space \({\mathbb R}^n\) , the authors obtain the coincidence among the Newton-Morrey-Sobolev space, the Haj?asz-Morrey-Sobolev space and the classical Morrey-Sobolev space. Finally, when (??, d) is geometrically doubling and μ a non-negative Radon measure, the boundedness of some modified (fractional) maximal operators on modified Morrey spaces is presented; as an application, when μ is doubling and satisfies some measure decay property, the authors further obtain the boundedness of some (fractional) maximal operators on Morrey spaces, Newton-Morrey-Sobolev spaces and Haj?asz-Morrey-Sobolev spaces.     

Grand Sobolev Spaces on Metric Measure Spaces

Siberian Mathematical Journal - We study the properties of the so-called grand Sobolev spaces on a&nbsp;metric measure space. The introduction of the spaces is motivated by the available...