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arXiv 1602.01378math.AC
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参数理想的Rees代数何时几乎是Gorenstein分次环?

When are the Rees algebras of parameter ideals almost Gorenstein graded rings?

Shiro Goto, Rahimi Mehran, Naoki Taniguchi, Hoang Le Truong

摘要:

设$A$是一个Cohen-Macaulay局部环,其上有$\operatorname{dim} A = d\ge 3$,且具有标准模${\mathrm K}_A$ .设$a_1, a_2, \ldots, a_r$ $(3 \le r \le d)$为$A$的参数子系统,并设置$Q= (a_1, a_2, \ldots, a_r)$。证明了若$Q$的Rees代数${\mathcal R}(Q)$是几乎Gorenstein分次环,则$A$是正则局部环,$a_1, a_2, \ldots, a_r$是$A$的正则参数系的一部分.

英文摘要:

Let $A$ be a Cohen-Macaulay local ring with $\operatorname{dim} A = d\ge 3$, possessing the canonical module ${\mathrm K}_A$. Let $a_1, a_2, \ldots, a_r$ $(3 \le r \le d)$ be a subsystem of parameters of $A$ and set $Q= (a_1, a_2, \ldots, a_r)$. It is shown that if the Rees algebra ${\mathcal R}(Q)$ of $Q$ is an almost Gorenstein graded ring, then $A$ is a regular local ring and $a_1, a_2, \ldots, a_r$ is a part of a regular system of parameters of $A$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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