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arXiv 0809.3507math.ACmath.AG
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秩1赋值半群的增长性

Growth of rank 1 valuation semigroups

Steven Dale Cutkosky, Kia Dalili, Olga Kashcheyeva

摘要:

我们考虑的问题是,哪些半群可以出现作为半群$S_R(ν)$的秩1赋值控制的诺特局部环$R$的正值。从$P_R(n)$的上界开始,给出了$n\in\NN$的$ϕ(n)=S_R(ν)\cap (0,n)$增长的多项式型上界,其中$P_R(n)$是$R$的Hilbert函数.在Cutkosky和Teissier的论文“Semigroups of valuations on local rings,II”中,这个界被推广到任意秩赋值的一个非常一般的界,arXiv:0805.3788。这个界已经足以给出秩1良序半群的简单例子,这些半群不是控制诺特局部环的赋值的值半群$S_R(ν)$。在秩为1的情况下,有可能给出更精确的估计$ϕ(n)$,我们证明在本文中。我们还给出的例子表明,许多不同的增长率是可能的$ϕ(n)$在一个经常的本地环的尺寸2,如$n(α$的任何合理的$α$与$1\leα\le 2$,和$n{log}(n)$。

英文摘要:

We consider the question of which semigroups can occur as the semigroup $S_R(ν)$ of positive values of a rank 1 valuation dominating a Noetherian local ring $R$. We give a number of bounds of polynomial type on the growth of $ϕ(n)=S_R(ν)\cap (0,n)$ for $n\in\NN$, starting with the upper bound of $P_R(n)$, where $P_R(n)$ is the Hilbert function of $R$. This bound is generalized to an extremely general bound for arbitrary rank valuations in the paper "Semigroups of valuations on local rings, II", by Cutkosky and Teissier, arXiv:0805.3788. This bound is already enough to give simple examples of rank 1 well ordered semigroups which are not the value semigroup $S_R(ν)$ of a valuation dominating a Noetherian local ring. In the case of rank 1, it is possible to give more precise estimates of $ϕ(n)$, which we prove in this paper. We also give examples showing that many different rates of growth are possible for $ϕ(n)$ on a regular local ring of dimension 2, such as $n(α$ for any rational $α$ with $1\leα\le 2$, and $n{log}(n)$.

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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