局部凸空间的正规性

本文建立局部凸拓扑向量空间的正规性、完全正规性和单调正规性的等价条件．作为这些结果的应用，研究了函数空间的单调正规性和可度量性．     

端单调线性泛函的存在性(英文)

讨论了偏序线性空间的代数对偶空间上的端单调线性泛函的延拓性．进一步,还推导出端单调线性泛函的存在性定理．     

单位球上Dirichlet空间上的分式线性复合算子

本文主要研究单位球上Dirichlet空间上的分式线性复合算子的伴随算子,讨论了该空间以及它与常值函数的商空间上此类算子的正规性和本性正规性,并得到非椭圆型分式线性映射和其伴随映射的复合为椭圆或抛物型分式线性映射的结论.     

一类具有非单调内层性态的半线性边值问题

本文运用内层校正方法和微分不等式理论研究了一类半线性边值问题.在一定的条件下,我们获得了两类非单调内层性态:尖层性态或非单调过渡层性态的解的一致有效复合展开式.     

模糊分析中的泛函空间

本文从四个方面简要综述了模糊分析中泛函空间的若干研究工作,包括:(1)在拓扑线性空间和某些模糊赋范线性空间框架下模糊泛函分析的发展;(2)模糊数空间的各种度量及对具有线性结构的相应具体泛函空间的嵌入;(3)模糊连续函数空间与针对不同模糊连续性的多层正则模糊神经网络的逼近;(4)基于单调测度论的可测函数空间和Sugemo可积函数空间.文中也提出今后开展研究的几点建议.吴从炘在1952–1955年期间是东北人民大学数学系的一名本科生,徐利治先生给予了吴长期指导与诸多支持.     

数学年刊第25卷B辑第2期(2004)目次和提要

具孔洞区域内的半线性抛物方程的齐性化 P.DONA了ro A.NABIL 该文致力于在具有周期性的大小为‘的子循环孔洞的区域内的具急振系数的半线性抛物方程的齐性化.在孔洞的边界规定了一个Neumann条件. 孔洞的出现不再保证LZ解的紧性.为克服这一困难,作者引入了一个恰当的辅助线性间题,利用校正算子的结果,刻划了当‘朴O时该半线性问题的渐近状态,给出了极限方程. 正则关系与单调正规序空间 徐晓泉刘应明 该文推广了Zareckii关于关系正则性的经典定理,获得了关系正则性的内蕴刻划.基于推广的Zareckii定理和正则性内蕴刻划给出了序拓扑空间…     

两个GO-空间乘积的正规性

本文是在日本数学家Ｋｅｍｏｔｏ １９９３年所作的关于一个ＧＯ－空间（广义线性序空间）和一个正则不可数基数乘积正规性的结果的基础上作了进一步的推广，得到了两个ＧＯ－空间乘积的正规性的一个更一般的结果．     

对称Fock空间上的加权复合算子

本文研究了可分Hilbert空间上的对称Fock空间上有界(线性和反线性)加权复合算子. 完全刻画了酉加权复合算子和自伴加权复合算子, 并考虑了一类正规加权复合算子.     

James空间的推广

R.H.Lohman和P.G.Casazza[2]就自反的、具有对称的块P——Hilbert基的Banach空间进行了讨论,给出了一阶次自反Banach空间的一种构造方法。本文在一类具有IS型基的Banach空间上进行了推广,并给出了构造一阶次自反空间的更一般性的方法。 以下记号S、的意义同[2],文中IS序列、ESA序列、SA序列及单调基、正规基的定义可见[2]、[3]。并总设E是Banach空间,{x_i}是E之IS型单调正规基。 一般的James空间定义类似[2],区别在于对于a=(a_i)∈S和我们定义:     

弱Hardy正规鞅空间与原子分解

本文证明了弱Hardy正规鞅空间wHp和wH^sp上的原子分解定理.利用鞅的原子分解给出了弱Hardy正规鞅空间上的次线性算子有界的一个充分条件.利用这个条件得到了关于正规鞅的一些弱Lp范数不等式和弱（p,p）型不等式.这些结果是经典Hp鞅论中一些重要结果的弱型对应.     

Zero-dimensional spaces from linear structures

It is well known that spaces defined from a separated uniform structure with a linearly ordered base of uncountable cofinality (ω_μ-metrizable spaces) are ultraparacompact and have an ortho-base, hence are non-Archimedean spaces in the sense of A. Monna. Our results concern whether certain wider classes of spaces defined from linear structures retain these properties. We construct for every regular cardinal ω_μ, examples of ω_μ-additive, ω_μ-stratifiable spaces (i.e., ω_μ-Nagata spaces) that do not have an ortho-base. We give a number of examples of linearly stratifiable spaces, one of which is related to an example of Eric K. van Douwen concerning countable box products of stratifiable spaces.     

Characterizations of stratifiable μ-spaces

We show that the following classes of topological spaces coincide: (1) stratifiable μ-spaces, (2) stratifiable spaces with an M-structure, (3) regularly stratifiable spaces, and (4) strongly regularly stratifiable spaces.     

Stratifiable spaces defined by pair collections

We define a pair (F,U) to be a closed set F and an open set U such that F ? U. A sequence of pair collections is used to characterize stratifiable spaces instead of a sequence of neighbornets. We introduce a new class of spaces, called regularly stratifiable spaces, which is defined in terms of pair collections. Every stratifiable μ -space is regularly stratifiable, and every regularly stratifiable space has a σ -almost locally finite base, thus is hereditary M₁. J. Nagata's problem for the dimension of M₁ -spaces is answered positively in the class of regularly stratifiable spaces.     

边缘s映射、边缘紧映射与k半层空间

主要讨论了k半层空间上的闭映射性质,证明了k半层空间的闭映像若是不含有闭子空间同胚于S_(ω1)(S_ω)的k空间,则该闭映射是边缘s映射(边缘紧映射).最后给出例子表明弱层空间未必是层空间,否定回答了关于层空间的一个问题.     

When is a Volterra space Baire?

In this paper, we study the problem when a Volterra space is Baire. It is shown that every stratifiable Volterra space is Baire. This answers affirmatively a question of Gruenhage and Lutzer in [G. Gruenhage, D. Lutzer, Baire and Volterra spaces, Proc. Amer. Math. Soc. 128 (2000) 3115-3124]. Further, it is established that a locally convex topological vector space is Volterra if and only if it is Baire; and the weak topology of a topological vector space fails to be Baire if the dual of the space contains an infinite linearly independent pointwise bounded subset.     

Insertion of semi-continuous functions and sequences of sets

We investigate the relations between decreasing sequences of sets and the insertion of semi-continuous functions, and give some characterizations of countably metacompact spaces, countably paracompact spaces, monotonically countably paracompact spaces (MCP), monotonically countably metacompact spaces (MCM), perfectly normal spaces and stratifiable spaces.     

k半层空间的性质及相关问题

k半层空间是层空间与N空间的共同推广,本文综述k半层空间的研究进展,介绍k半层空间的刻画、性质及其推广,给出一些相关问题,供进一步研究.     

Concerning the Collins, Reed, Roscoe, Rudin Metrisation Theorem

New criteria, in terms of the Collins-Roscoe structuring mechanism,are given for a space to be semi-stratifiable. Known characterisationsof metrisable, developable and stratifiable spaces are deduced.     

Semi-stratifiable spaces and the insertion of semi-continuous functions

In this paper, we investigate the relations between the stratifiable structure of spaces and the insertion of semi-continuous functions and give some characterizations of perfect spaces, semi-stratifiable spaces and K-semi-stratifiable spaces.     

Continuous Function Characterizations of Stratifiable Spaces

The insertion of a continuous function between pairs of semicontinuous functions in a monotone manner is investigated. In particular, it is established that a topological space is stratifiable if and only if for every pair of semicontinuous functions......