用α^＊—内射S—系对幺半群的刻划

The Characterizations of Monoids by α*-Injective S-act

利用 -格林关系将内射S -系推广为α -内射S -系 ,并且对所有S -系是α -内射的幺半群给出了刻划 .

This paper introduces the concept of α *-injective S-acts as a generalization of injective S-act through * - Green relation,and characterizes those monoids over which all S-acts are α *-injective.