摘要
In this paper we consider that rings R are coherents and R is p-injective,We call suchrings to be right PC-rings.The structure of these rings is examined and if S is PC-ring if and only tfR is PC-ring,where S is an almost exeallent extension of R.
本文我们讨论了这种环R的结构,R是凝聚环且R作为R_模是P_内射,我们称此环为PC_环.并证明了在几乎优越扩张下的不变性.
