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arXiv 0811.4461math.ACmath.RA
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有限同调维数模中嵌入的存在性

On the existence of embeddings into modules of finite homological dimensions

Ryo Takahashi, Siamak Yassemi, Yuji Yoshino

摘要:

设R是交换Noether局部环.我们证明了R是Gorenstein当且仅当每个有限投射维数投射维数的有限投射生成R-模都能嵌入到有限投射维数的有限投射生成R-模中.这将Auslander和Bridger的一个结果推广到了克鲁尔维数更高的环上,并且改进了Foxby的一个结果,其中环被假定为Cohen-Macaulay环.

英文摘要:

Let R be a commutative Noetherian local ring. We show that R is Gorenstein if and only if every finitely generated R-module can be embedded in a finitely generated R-module of finite projective dimension. This extends a result of Auslander and Bridger to rings of higher Krull dimension, and it also improves a result due to Foxby where the ring is assumed to be Cohen-Macaulay.

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