可列集合套

[1]中给出模糊集的分解定理与表现定理，指出可利用集合套H＝{H（λ）|λ∈[0,1]}刻化模糊集。本文定义可列集合套H＝{H（a）|a∈Q}，Q是（0，1）的可列稠密子集。相应地给出新的分解定理与表现定理。指出可利用可列集合套刻化的模糊集。     

Spaces in Which Countable Closed Sets Have Countable Character

It is proved that in a T ₃ space countable closed sets have countable character if and only if the set of limit point of the space is a countable compact set and every compact set is of countable character. Also, it is shown that spaces where countable sets have countable character are WN-spaces and are very close to M-spaces. Finally, some questions of Dai and Lia are discussed and some questions are proposed.     

随机模糊集与随机集

本文研究了三个方面的工作：一是定义了一种模糊集上的可测结构，从而定义了随机模糊集，这些定义都与论域Ｘ上的拓扑结构无关。将通常意义下的集合看成特殊模糊集得到的通常集合上的超可测结构与文（３）中的定义一致；二是给出了随机模糊集、随机集的一些等价条件；三是研究了随机模糊集、随机集的分布与其有限维落影族的关系。     

Generating Countable Sets of Permutations

Let E be an infinite set. In answer to a question of Wagon,I show that every countable subset of the symmetric group Sym(E)is contained in a 2-generator subgroup of Sym(E). In answerto a question of Macpherson and Neumann, I show that, if Sym(E)is generated by A B where |B| ||E||, then Sym(E) is generatedby A {} for some permutation in Sym(E).     

随机集的独立性与同分布性的刻划

本文绘出了随机集的独立性与同分布性的刻化，所给出的准则比Hess[4]，[5]更易于验证．     

Generalized Vector Variational Inequalities over Countable Product of Sets

In this paper, we consider vector variational inequalities with set-valued mappings over countable product sets in a real Banach space setting. By employing concepts of relative pseudomonotonicity, we establish several existence results for generalized vector variational inequalities and for systems of generalized vector variational inequalities. These results strengthen previous existence results which were based on the usual monotonicity type assumptions     

Generalized Vector Variational Inequalities over Countable Product of Sets

In this paper, we consider vector variational inequalities with set-valued mappings over countable product sets in a real Banach space setting. By employing concepts of relative pseudomonotonicity, we establish several existence results for generalized vector variational inequalities and for systems of generalized vector variational inequalities. These results strengthen previous existence results which were based on the usual monotonicity type assumptions     

Fuzzy集的势与可数Fuzzy基数

本文首先定义了Ｆｕｚｚｙ集的等势关系和Ｆｕｚｚｙ集的势，并讨论了有关Ｆｕｚｚｙ集的势的若干命题，然后在自然数集上定义了可数Ｆｕｚｚｙ基数。最后给出了确定可数论域上Ｆｕｚｚｙ集的Ｆｕｚｚｙ基数的方法，并对其若干性质进行了讨论。上述定义均以经典集论中相应定义为特款。     

End-Faithful Spanning Trees of Countable Graphs with Prescribed Sets of Rays

We prove that a countable connected graph has an end-faithful spanning tree that contains a prescribed set of rays whenever this set is countable, and we show that this solution is, in a certain sense, the best possible. This improves a result of Hahn and Siran [2, Theorem 1]     

Conical Uniqueness Sets for the Spherical Radon Transform

Let K be a cone in Rⁿ. Then K is a uniqueness set for the sphericalRadon transform if and only if it is not contained in the zeroset of any (nontrivial) homogeneous harmonic polynomial. A localversion of this result is also proved. 1991 Mathematics SubjectClassification 44A12.     

Uniqueness of the Core for Chain-Complete Ordered Sets

It is proved that the C-core of a chain-complete ordered set is unique up to isomorphism if it exists. We also give an example that shows that the (U CL C)-core of an ordered set need not be unique. This is related to a question, which asks if the P-core is unique if it exists.     

Curvature Measures and Random Sets,I

The paper deals with signed curvature measures as introduced by Federer for sets with positive reach. An integral representation and a local Steiner formula for these measures are given. The main result is the additive extension of the curvature measures to locally finite unions of compatible sets with positive reach. Within this comprehensive class of subsets of R^d a generalized Steiner polynomial (local version) and section theorems (principal kinematic formula, Crofton formula) for the curvature measures are derived.     

统计自相似集与随机不变测度

设犡是一完备可分度量空间，犓（ω）为Ｇｒａｆ随机模型下的随机递归集．该文构造了一列随机不变测度μ狀（狀≥１），它们是Ｈｕｔｃｈｉｎｓｏｎ确定模型下不变测度的推广；证明了存在一随机概率测度μ ，使得Ｓｕｐｐμ ＝犓（ω）且μ狀→μ （狀→∞）（弱收敛）；得到了μ狀的一些局部性质．     

一类随机算子方程的随机解的存在唯一性

利用Mann迭代技巧,讨论了一类随机算子方程A（ω,x（ω）,x（ω））=B（ω,x（ω））的随机解的存在唯一性,并给出了迭代序列收敛于解的误差估计,所得结果是某些已知结果本质改进和推广.     

随机赋范线性空间中的凸集与凸性

本文定义了随机赋范线性空间中各种凸集和凸性，研究了它们的特性及相互间关系．     

On a Class of Random Variational Inequalities on Random Sets

We study a class of random variational inequalities on random sets and give measurability, existence, and uniqueness results in a Hilbert space setting. In the special case where the random and the deterministic variables are separated, we present a discretization technique based on averaging and truncation, prove a Mosco convergence result for the feasible random set, and establish norm convergence of the approximation procedure.     

具有两个IM公共值集的亚纯函数

本文讨论了亚纯函数的唯一性问题,证明了存在一个具有13个元素的集合S使得对任意两个非常数的亚纯函数f与g,只要满足E(S,f)=E(S,g)和E({∞),f)=E({∞},g),必有f≡g.     

Uniqueness Theorems for Meromorphic Functions That Share Three Sets

In this article, we deal with the problem of uniqueness of meromorphic functions that share three sets, and obtain one set S with 5 elements such that any two nonconstant meromorphic functions ? and g satisfying E(S, ?) = E(S, g), E({0}, ?) = E({0}, g) and E({∞}, ?) = E({∞}, g) must be identical.     

变异函数S-粗集的随机特性

利用函数S-粗集理论和属性函数迁移的随机性,提出属性函数迁移的信度及信度函数的概念;给出变异函数Sp-粗集与变异函数S(p,p')-粗集的随机生成,讨论了变异函数Sp-粗集与变异函数S(p,p')-粗集的结构及特性.     

Existence and Uniqueness of Solutions to Random Impulsive Differential Systems

The existence and uniqueness in mean square of solutions to certain random impulsive differentialsystems is discussed in this paper.Cauchy-Schwarz inequality,Lipschtiz condition and techniques in stochasticanalysis are employed in achieve the desired results.