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Stability of Gorenstein categories

机译:戈伦斯坦类别的稳定性

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摘要

We show that an iteration of the procedure used to define the Gorenstein projective modules over a commutative ring R yields exactly the Gorenstein projective modules. Specifically, given an exact sequence of Corenstein projective R-modules G = ...->partial derivative(G)(2) G(1) -> partial derivative(G)(1) G(0) -> partial derivative(G)(0) ... such that the complexes HOMR(G, H) and Hom(R)(H, G) are exact for each Gorenstein projective R-module H, the module Coker(partial derivative(G)(1)) is Gorenstein projective. The proof of this result hinges upon our analysis of Gorenstein subcategories of abelian categories.
机译:我们表明,用于在交换环R上定义Gorenstein投射模的过程的迭代恰好产生了Gorenstein投射模。具体来说,给定Corenstein投射R-模的精确序列G = ...->偏导数(G)(2)G(1)->偏导数(G)(1)G(0)->偏导数( G)(0)...使得复合物HOMR(G,H)和Hom(R)(H,G)对于每个Gorenstein射影R模H,模量Coker(偏导数(G)(1) ))是Gorenstein射影的。该结果的证明取决于我们对阿贝尔类别的Gorenstein子类别的分析。

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