利用Moritacontext31,j画具有两个对象的预加范畴.得到了具有两个对象的范畴是预加法范畴的充要条件以及两个环是Morita等价的一个刻画.
Based iects, than obtains a on Morita context characterizes pre-addictive categories with two oh- sufficient and necessary conditions that category with two objects is a pre-addictive category and characterization that two rings are Morita equivalence.