安徽工业大学学报(自然科学版)
安徽工業大學學報(自然科學版)
안휘공업대학학보(자연과학판)
JOURNAL OF ANHUI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE)
2012年
2期
180-182
,共3页
几乎优化扩张%Gorenstein投射%Gorenstein同调维数
幾乎優化擴張%Gorenstein投射%Gorenstein同調維數
궤호우화확장%Gorenstein투사%Gorenstein동조유수
almost excellent extension%Gorenstein projective%Gorenstein homological dimension
假设R是环,S是R的几乎优化扩张环.主要研究环R和环S上的Gorenstein同调维数的关系.首先,假设M是S模,证明MR是Gorenstein投射的充分必要条件为Ms是Gorenstein投射的.其次,证明了环R的左Gorenstein维数跟环S的左Gorenstein 同调维数相等.
假設R是環,S是R的幾乎優化擴張環.主要研究環R和環S上的Gorenstein同調維數的關繫.首先,假設M是S模,證明MR是Gorenstein投射的充分必要條件為Ms是Gorenstein投射的.其次,證明瞭環R的左Gorenstein維數跟環S的左Gorenstein 同調維數相等.
가설R시배,S시R적궤호우화확장배.주요연구배R화배S상적Gorenstein동조유수적관계.수선,가설M시S모,증명MR시Gorenstein투사적충분필요조건위Ms시Gorenstein투사적.기차,증명료배R적좌Gorenstein유수근배S적좌Gorenstein 동조유수상등.
Let R be a ring and S an almost excellent extension of R.The relationship of Gorenstein homological dimensions over R and S are studied.Firstly,if M is an S-module,then MR is Gorenstein projective if and only if Ms is Gorenstein projective.Secondly,the conclusion that the right Gorenstein dimension of R is equal to the right Gorenstein dimension of S is proved.