伪统一模与剩余格之间的关系

讨论伪统一模与剩余格之间的关系,证明完备格上无穷∨-分配伪统一模和它的剩余蕴涵算子构成一个完备剩余格,并说明任给一个完备剩余格L=(L,∧,∨,*,e→,,*是无穷∨-分配的伪统一模,→和(?)是*的剩余蕴涵算子.     

完备格Brouwer上伪t-模与蕴涵算子的注记(II)(英文)

进一步研究完备Brouwer格上伪t-模与蕴涵算子,给出同二元算子生成的伪t-模与蕴涵算子的计算公式。     

完备格Brouwer上伪t-模与蕴涵算子的注记(Ⅱ)

进一步研究完备Brouwer格上伪t-模与蕴涵算子，给出同二元算子生成的伪t-模与蕴涵算子的计算公式。     

完备Brouwer格上伪t-模与蕴涵算子的注记(I)

进一步研究完备Brouwer格上伪t-模和蕴涵算子,讨论完备Brouwer格上伪t-模和蕴涵算子的直积分解。     

广义单侧剩余广群

对吴氏左（右）剩余广群，给出一种新而且简化的定义，并详细地讨论其基本性质。用其主要结论得到完备格上的所有无穷∨-分配强伪t-模与所有无穷∧-分配强蕴涵算子之间的关系。     

三角模族T_(q,p)-LGN与逻辑系统LGN

首先, 给出一种新的带两个参数的左连续三角模族T(q,p)-LGN((q,p)∈[-1,1]×(-∞,0))及其伴随蕴涵算子族R(q,p)-LGN((q,p)∈[-1,1]×(-∞,0)), 分别简称它们为左连续三角模族T(p,q)-LGN及伴随蕴涵算子族R(q,p)-LGN;然后,定义了LGN三角模族的概念(基于此族的模糊逻辑系统等价于系统L,G与L*(或NM) 的所有定理的交LGN);最后,证明了左连续三角模族T(q,p)-LGN是LGN三角模族的一个子族.     

关于非正规算子的Putnam-Fuglede定理

<正> Hilbert 空间上的正规算子的 Putnam-Fuglede 定理(简称 P-F 定理),近年来又有许多作者进行了更深入的研究,并沿各种方向作了进一步的推广,例如,在定理的形式上加以推广,向着非正规算子方面的推广,以及以理想为模的 P-F 定理,等等.文献[1]证明了第二种形式的 P-F 定理:设 N_1,N_2 为正规算子,则 N_1XN_2=X 蕴涵 N_1XN_2=X;     

格蕴涵代数的区间值(J)-模糊滤子理论

将区间值模糊集和D[0,1]上的t-模(J)应用于格蕴涵代数的滤子理论,引入格蕴涵代数的区间值,(J)-模糊(关联、正关联)滤子的概念,给出了它们的等价刻画,研究了它们之间的关系.     

具有无穷时滞中立型泛函积分微分方程周期解的存在性

本文讨论具有无穷时滞中立型泛函积分微分方程ddtx(t)-∫t-∞B(t,s)x(s)ds=A(t,x(t))x(t) ∫t-∞C(t,s)x(s)ds ∑i=l1gi(t,x(t-τi(t)))的周期解问题.通过巧妙的构造算子,利用线性系统的指数二分性和Kras-noselskii不动点定理得到了周期解的存在性.我们的结果推广了相关文献的主要结果.     

分配夹心半环与加法完全J*-单半环（英文）

本文介绍了一类加法完全J~*-单半环,这类半环的加法半群为完全J~*-单半群.为了给出这类半环的结构,首先利用半环的H~*-类构造了一类分配夹心伪环.接着利用加法左零半环、加法右零半环和分配夹心伪环,给出了加法完全J~*-单半环的一个结构定理,推广了文献[J.Aust.Math.Soc.,1975,20(3):257-267]中关于加法完全单半环的相关结构定理.     

Remarks on the lattices of fuzzy subsets of a groupoid

In this paper we give a necessary and sufficient condition for a groupoid D such that the sup-min product is distributive over arbitrary intersection of fuzzy subsets of D, and correct some results from the paper [S. Ray, The lattice of all idempotent fuzzy subsets of a groupoid, Fuzzy Sets and Systems 96 (1998) 239–245]. Also, we prove that the set of all idempotent fuzzy sets forms a complete lattice, which is a complete join-sublattice of the lattice of all fuzzy subgroupoids. This result extends the corresponding result from the above mentioned paper.     

A note on the article “Fuzzy alpha-sets and alpha-continuous maps”

In this note we show that some results which appeared in the article by M.K. Singal and N. Rajvanshi [Fuzzy Sets and Systems 48 (1992) 383–390] are incorrect.     

Fuzzy coefficient volatility (FCV) models with applications

Recently, Carlsson and Fuller [C. Carlsson, R. Fuller, On possibilistic mean value and variance of fuzzy numbers, Fuzzy Sets and Systems 122 (2001) 315–326] have introduced possibilistic mean, variance and covariance of fuzzy numbers and Fuller and Majlender [R. Fuller, P. Majlender, On weighted possibilistic mean and variance of fuzzy numbers, Fuzzy Sets and Systems 136 (2003) 363–374] have introduced the notion of crisp weighted possibilistic moments of fuzzy numbers. In this paper, we propose a class of FCV (Fuzzy Coefficient Volatility) models and study the moment properties. The method used here is very similar to the method used in Appadoo et al. [S.S. Appadoo, M. Ghahramani, A. Thavaneswaran, Moment properties of some time series models, Math. Sci. 30 (1) (2005) 50–63]. The proposed models incorporate fuzziness, subjectivity, arbitrariness and uncertainty observed in most financial time series. The usual forecasting method does not incorporate parameter variability. Fuzzy numbers are used to model the parameters to incorporate parameter variability.     

Notes on convergence of geometric mean for fuzzy numbers

In this paper, we give some sufficient conditions for convergence of geometric mean forT-related fuzzy numbers whereT is an Archimedeant-norm under some mild restrictions. These results generalize earlier results of Hong and Lee [Fuzzy Sets and Systems 116 (2000) 263–267].     

A note on the left and right translations in L-topological groups

In this note, we show by a counterexample that a proposition on L-homeomorphism property of the left and right translations in L-topological groups given by Bayoumi [On initial and final L-topological groups, Fuzzy Sets and Systems 156 (2005) 43–54] is incorrect, and offer its modified version.     

Stability and the fuzzy controller

This paper corrects a part of the main result (Theorem 1) in Buckley (Fuzzy Sets and Systems 77 (1996) 167–173).     

Comments on some versions of intuitionistic fuzzy propositional calculus due to K. Atanassov and G. Gargov

We show that the versions of intuitionistic fuzzy propositional calculus given in Definitions 6 and 7 in Atanassov and Gargov (Fuzzy Sets and Systems 95 (1998) 39–52) do not satisfy modus ponens. Furthermore, we show that the version of intuitionistic fuzzy propositional calculus given in Definition 8 by Atanassov and Gargov is incorrect.     

Multidimensional interval-valued fuzzy reasoning approach based on weighted similarity measure

This paper focuses on presentation of a method to bidirectional interval-valued fuzzy approximate reasoning by employing a weighted similarity measure between the fact and the antecedent (or consequent) portion of production rule in which the vague terms are represented by interval-valued fuzzy concepts rather than plain fuzzy sets. The proposed method is more reasonable and flexible than the one presented in the paper by Chen [Fuzzy Sets and Systems, 91(1997), 339–353] due to the fact that it not only can deal with multidimensional interval-valued fuzzy reasoning scheme, but also consider the different importance degree of linguistic variables in production rule and that of elements in each universe.