本文主要给出F-复盖的直积还是一个F-复盖的充分条件和充要条件.假设右R-模类F在直积,直和项下封闭,{mi}是一簇右R-模.如果每个φi......

本文主要给出F-复盖的直积还是一个F-复盖的充分条件和充要条件.假设右R-模类F在直积,直和项下封闭,{M_i}i∈I是一簇右R-模.如果每......

Let R be a ring,and let(F,C) be a cotorsion theory.In this article,the notion of F-perfect rings is introduced as a nont......