Some Characterizations of Left Weakly Regular Ordered Semigroups

In this paper, the notion of left weakly regular ordered semigroups is introduced. Furthermore, left weakly regular ordered semigroups are characterized by the properties of their left ideals, right ideals and （generalized） bi-ideals, and also by the properties of their fuzzy left ideals, fuzzy right ideals and fuzzy （generalized） bi-ideals.

偏序半群的左理想、偏序同态与商序同态

通过偏序半群的左理想、拟素左理想、拟半素左理想、弱素左理想和弱拟素左理想,对偏序半群的偏序同态与商序同态的性质进行了刻画。

关于完全弱半素子模

本文定义了完全弱半素左理想,完全弱半素环,完全弱半素模和m′-系的概念,给出了完全弱半素子模的一些性质和如下的一些关系:(1)设K是环R的左理想,则K是完全弱半素左理想当且仅当R/K是完全弱半素环;(2)设K是左R-模M的子模,那么K是M的完全弱半素子模,当且仅当C(K)=M\K是m′-系.

左广义弱零插入环的一个问题

首先,证明含单位元的结合环R是左广义弱零插入(GWZI)环当且仅当对任意的a,b∈R,ab=0蕴含存在正整数n,使得a^(n)Rb=0;其次,利用矩阵分块方法证明环R是左GWZI环当且仅当对任意的整数n≥2,S_(n)(R)是左GWZI环.

Some Characterizations of Strongly Semisimple Ordered Semigroups

In this paper, the concept of quasi-prime fuzzy left ideals of an ordered semigroup S is introduced. Some characterizations of strongly semisimple ordered semigroups are given by quasi-prime fuzzy left ideals of S. In particular, we prove that S is strongly semisimple if and only if each fuzzy left ideal of S is the intersection of all quasi-prime fuzzy left ideals of S containing it.

二阶下三角矩阵代数的左理想共轭类

给出了非平凡的左理想共轭类与非零奇异下三角矩阵的弱相似等价类的对应关系,刻画了二阶下三角矩阵代数的左理想共轭类半群的结构。