It introduces the concept of power semigroup, studies the relations between homomorphism and congruence of power semigroup and obtains some perfect results. 摘要給出了冪半群的概念，研究了冪半群的同態(tài)與同余關(guān)系，討論了它們之間的關(guān)系，并得到了一些理想的結果。
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關(guān)系，在逆半群上定義了模糊正規子半群和模糊商子半群，并研究了逆半群上由這幾類(lèi)模糊關(guān)系所定義的模糊同余關(guān)系的一些性質(zhì)。
