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arXiv math/0702531math.AC
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正则局部环的正特征刻划

Characterizations of Regular Local Rings in Positive Characteristics

Jinjia Li

摘要:

本文利用Hilbert-Kunz重数和它的高阶$\tor$重数$ıt_i=\underset{n \to \infty}{\lim} ł(\tor_i(k,{}^{f^n} R))/p^{nd}$给出了正则局部环的正特征刻划.我们还应用这些特征来改进Bridgeland和Iyengar最近在特征$p$情况下的结果。我们的证明避免了使用大Cohen-Macaulay模的存在性,这是Bridgeland和Iyengar证明的主要工具。

英文摘要:

In this note, we provide several characterizations of regular local rings in positive characteristics, in terms of the Hilbert-Kunz multiplicity and its higher $\tor$ counterparts $ıt_i=\underset{n \to \infty}{\lim} ł(\tor_i(k,{}^{f^n} R))/p^{nd}$. We also apply the characterizations to improve a recent result by Bridgeland and Iyengar in the characteristic $p$ case. Our proof avoids using the existence of big Cohen-Macaulay modules, which is the major tool in the proof of Bridgeland and Iyengar.

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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