关于含单半群的一些性质

Some properties on monoids

研究了含单半群的一些性质，主要结论有含单半群Ｇ的每一个正规含单子半群，确定了Ｇ上的一个拟同余关系，从而得到一个拟同余类半群；两个含单半群间的满同态可确定一个同余关系；含单半群的同态象同构于同余类半群等．

In this paper, we will make a detailed study of the monoid G. The result shows that every normal submonoid of G determines a quasi-congruent relation. An eqimorphism of G onto the monoid G'may determine a congruent relation. The homomorphic image of a monoid is isomorphic to the comgruence class.