摘要
引入PI-内射模,它是余挠模的一种自然推广.通过对PI-内射模的研究,定义了弱完全环并给出了Noether环与von Neumann正则环的一些新刻画.证明了:(1)若R为右Noether环,则每个右R-模都是PI-内射的;(2)Noether环R是完全环当且仅当R上的所有PI-内射模是余挠的.
The notion of PI-injective module is introduced,which is a natural generalization of cotorsion module.By discussing the properties of PI-injective modules,the weakly perfect ring is defined and some new characterizations of von Neumann regular rings and Noetherian rings are given.The following results are proved:(1) Let R be a ring.If R is right Noetherian,then each right R-module is PI-injective;(2) Let R be a Noetherian ring.Then R is perfect if and only if each PI-injective module is cotorsion.
出处
《浙江大学学报(理学版)》
CAS
CSCD
北大核心
2010年第2期123-125,147,共4页
Journal of Zhejiang University(Science Edition)