摘要
本文首次利用投射模给出了右ＦＰ—内射环的一个外部特征，即Ｒ为右ＦＰ一内射环当且仅当投射左Ｒ—模的有限生成子模为闭子模。
In this paper, we give an external characterization of righL FP-injective rings by meansof projective inodules.That is, R is a right FP-injective ring if and only if every finitelygenerated submodule of projective left R-module is closed.
