At first, both the concepts of fuzzy set and fuzzy re-lation are given, and the convergence of fuzzy matrices is introduced. 我们从模糊集与模糊关系的概念开始，引出模糊矩阵幂序列的收敛性问题。
On inverse semi-groups, the fuzzy normal sub-semigroup and fuzzy quotient sub-semigroup are defined via some special fuzzy relation by using fuzzy congruence relation on set. 摘要利用集合上模糊同余关系，在逆半群上定义了模糊正规子半群和模糊商子半群，并研究了逆半群上由这几类模糊关系所定义的模糊同余关系的一些性质。
