环同态上的co-＊^n-模

Co- ＊^ n-module over ring homomorphism

定义了co-*n-模,对于给定的两个同态的环A和R,找到了左A-co-*n-模AU提升到左R-co-*n-模HomA(ARR,AU))的条件。

A co- ＊^n-module was defined. The conditions under which a left co- ＊^n-module AU lifts to a left R co- ＊^n-module HomA （ARR,AU） over a ring homomorphism between ring A and R were given.