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arXiv 1412.2182math.ACmath.KT
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Cohen-Macaulay锥的边界和形状

Boundary and shape of Cohen-Macaulay cone

Hailong Dao, Kazuhiko Kurano

摘要:

令$R$为科恩-麦考利本地域。本文研究了在\cite{CK}中引入的模的数值等价下,Cohen-Macaulay模在生成的$R$ -模的Grothendieck群中的锥.本文证明了关于Cohen-Macaulay域的锥的边界的一个结果,并利用它得到了极大Cohen-Macaulay理想的同构类的有限性的一些推论.最后,我们明确地计算了由$ξη- f(x_1, \ldots, x_n)$定义的某些孤立超曲面奇点的Cohen-Macaulay锥。

英文摘要:

Let $R$ be a Cohen-Macaulay local domain. In this paper we study the cone of Cohen-Macaulay modules inside the Grothendieck group of finitely generated $R$-modules modulo numerical equivalences, introduced in \cite{CK}. We prove a result about the boundary of this cone for Cohen-Macaulay domain admitting de Jong's alterations, and use it to derive some corollaries on finiteness of isomorphism classes of maximal Cohen-Macaulay ideals. Finally, we explicitly compute the Cohen-Macaulay cone for certain isolated hypersurface singularities defined by $ξη- f(x_1, \ldots, x_n)$.

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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