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arXiv math/0703644math.ACmath.RA
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Gorenstein范畴的稳定性

Stability of Gorenstein Categories

Sean Sather-Wagstaff, Tirdad Sharif, Diana White

摘要:

我们表明,迭代的程序用于定义Gorenstein投射模在交换环$R$产生的Gorenstein投射模。具体地说,给定Gorenstein投射$R$ -模块$G=...\xra{\partial^G_2}G_1\xra{\partial^G_1}G_0\xra{\partial^G_0} ...$的精确序列,使得复合物$\Hom_R(G,H)$和$\Hom_R(H,G)$对于每个Gorenstein投射$R$ -模块$H$是精确的,模块$\coker(\partial^G_1)$是Gorenstein投射的。这个结果的证明依赖于我们对阿贝尔范畴的Gorenstein子范畴的分析。

英文摘要:

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 Gorenstein projective $R$-modules $G=...\xra{\partial^G_2}G_1\xra{\partial^G_1}G_0\xra{\partial^G_0} ...$ such that the complexes $\Hom_R(G,H)$ and $\Hom_R(H,G)$ are exact for each Gorenstein projective $R$-module $H$, the module $\coker(\partial^G_1)$ is Gorenstein projective. The proof of this result hinges upon our analysis of Gorenstein subcategories of abelian categories.

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