幂群所诱导的L－Fuzzy幂群

本文在幂群［１］的基础上，提出了幂群所诱导的Ｌ－Ｆｕｚｚｙ幂群、Ｌ－Ｆｕｚｚｙ幂群的λ－截、次幂群等—系列概念，并给出了幂群与其诱导的Ｌ－Ｆｕｚｚｙ幂群、λ截集群间的次同态、同态等关系。     

具有弱中间幂等元的正则半群

本文在正则半群上引入弱中间幂等元和拟中间幂等元,着重探讨了这两类幂等元的性质特征.构造了若干具有弱(拟)中间幂等元的正则半群,确定了弱中间幂等元和拟中间幂等元之间的关系,给出了弱中间幂等元和拟中间幂等元各自的等价判定,利用拟中间幂等元刻画了纯正半群.最后,得到了构造具有拟中间幂等元的正则半群的一般途径,并在此基础上进一步给出了判定正则半群是否具有乘逆断面的方法.     

椭圆元在维数公式中的贡献

主要算出SU(n,1)中正规椭圆元g的共轭类在维效公式中的贡献: N(g)=λn-(n 1)m/|C(g)|(λ-λ1)(λ-λ2)…(λ-λn),其中m≥2,Bn表示n维超球,SU(n,1)是Bn的自同构群且在Bn上可迁;不失一般性,上式中g=对角阵(λ1,…,λn,λ)(其中λi≠λ,i=1,2,…,n)．     

椭圆元在维数公式中的贡献

主要算出SU(n,1)中正规椭圆元g的共轭类在维数公式中的贡献N(g)=λn-(n+1)m/|C(g)|(λ-λ1)(λ-λ2)…(λ-λn)'其中m≥2,Bn表示n维超球,SU(n,1)是Bn的自同构群且在Bn上可迁;不失一般性,上式中g=对角阵(λ1,…,λn,λ)(其中λi≠λ,i=1,2,…,n).     

分子格半群

在本文中，作者在格半群上引入了半群元和理想元的概念，使得半群（理想）和ＴＬ－Ｆｕｚｚｙ半群（理想）是其特例。在分子格半群上引入了群元和正规群元等概念，在更高的层次上统一了群和Ｌ－Ｆｕｚｚｙ群。     

粗糙模糊集的分解

引入λ-下截集，λ-下重截集和λ-上重截集的概念，讨论粗糙模糊集的构造，并得到并、交的表示。     

偏序集上的滤子极大理想

在偏序集上引入并考察了滤子极大理想的概念,证明了相应的存在性定理。引入并考察了伪极大元和伪既约元的概念,利用图表的形式对连续格中各种类型的既约元和素元之间的关系进行了归纳总结,完善了文献《Continuous Lattices and Domains》(作者:G.Gierz,et al)中的一个图表的相关内容,填补了在分配的连续格情形该图表的一个未知内容,部分地回答了该文献中的一个问题。     

九参数双参数元与广义协调元的对称列式

1.引言 最近石钟慈和陈绍春使用双参数法对九参数拟协调元和九参数广义协调元进行了研究。研究结果表明,基于函数空间     

一类矩阵的Drazin逆

本得到了一类环上矩阵Drazin的一个定理：设N表有单位元环R中零元、可逆元集合与R的中心Z(R)的交集，M表R的子域与Z（R)的交集，A∈Rn×n，若f(λ)=cλ(1-λq(λ))是A的化零多项式，其中q(λ)的系数属于N，且c∈N，则A的Drazin逆存在，且X=A^k[q(A)]k 1是A的唯一的一个Drazin逆。     

拟-*-A类算子的Riesz幂等元

证明了若T是拟-*-A类算子且λ_0是σ(T)的孤立点谱,则E是自共轭算子且满足EH=Ker(T-λ_0)=Ker(T-λ_0)~*,其中E是算子T关于λ_0的Riesz幂等元.     

关于具有Fuzzy约束的Fuzzy多目标规划非控解的存在性

本文对具有Fuzzy约束集的Fuzzy多目标规划引进Fuzzy非控点和Fuzzy非控解的概念,讨论了它们的一些基本性质和存在性。     

A fixed point theorem for a family of mappings in a fuzzy metric space

In this paper we give a common fixed point theorem for a family of mappings of a G-complete fuzzy metric space (X, M, *) into itself. From this result we deduce a common fixed point theorem for a family of mappings of a complete metric space (X, d) into itself. Supported by University of Palermo.     

Convergence of sequences of fuzzy numbers and fixed point theorems for increasing fuzzy mappings and application

In this paper, we discuss some properties of the convergence of sequences of fuzzy numbers and obtain some fixed point theorems for increasing fuzzy mappings. And as applications, we give two examples. One is about fishery production, which discusses the balance problems between the quantity of catching fish and the increase in the quantity of fish that is produced by the reproduction and growth of fish. Another is about the solvability of the equation of fuzzy numbers.     

A reply to ‘a note on fuzzy programming and the pareto optimal set’

This note corrects the error in [1] as determined by [2].     

Superconvergence for rectangular serendipity finite elements

Based on an orthogonal expansion and orthogonality correction in an element, superconvergence at symmetric points for any degree rectangular serendipity finite element approximation to second order elliptic problem is proved, and its behaviour up to the boundary is also discussed.     

A Note on Ranking Fuzzy Numbers with an Area Method using Circumcenter of Centroids

In this study, we show that ranking fuzzy numbers with the area method using circumcenter of centroids presented by Rao and Shankar failed to rank effectively the generalized fuzzy numbers. By proving a theorem and using some numerical examples, we demonstrate that their proposed method cannot rank consistently some fuzzy numbers or is not consistent with human intuition.     

Fuzzy modelling with tolerances

We consider the problem of the resolution of fuzzy equation systems: A certain number of fuzzy inputs and outputs is given. How can we determine a fuzzy relation which describes the behaviour of the object under consideration? When attributing this problem to fuzzy equations in the classical sense it may happen that a solution does not exist. Therefore we introduce fuzzy tolerances as an extension of the solvability conception. For this problem we get the whole solution set by means of posets. Moreover, we consider the inverse problem: How to determine tolerances to get consistency (i.e. at least one solution) for the arising equation system.     

On Essential Sets of Fixed Points for Functions

This article studies essential stabilities of fixed points under the dual perturbations of functions and domains using uniform topology. We show that each fixed point for most functions has the ability to resist these dual perturbations. The existence result of minimal essential sets of fixed points is established, and the connectedness of minimal essential sets is proved under some conditions. These generalize some corresponding results in references.