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arXiv 1602.07041math.AC
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理想的t-约化与t-整闭包

t-Reductions and t-integral closure of ideals

S. Kabbaj, A. Kadri

摘要:

设R是整环,I是R的非零理想. I的一个次理想J是I的一个t-约化,如果对某个正整数n,(JI^{n})_{t}=(I^{n+1})_{t}. R中的元素x是I上的t-积分,如果存在方程x^{n} + a_{1} x^{n-1} +.+ a_{n-1} x + a_{n} = 0,其中a_{i}在(I^{i})_{t}中,I = 1,.,n.所有在I上t-积分的元素的集合称为I的t-整闭包。本文研究理想的t-约化和t-整闭包。我们的目标是建立令人满意的t-类似的著名的结果,在文献中,整闭包的理想及其相关的减少。也就是说,第2节确定了理想的t-约化的基本性质,并给出了区分约化和t-约化概念的明确例子。第三节研究了理想的t-整闭包的概念,包括它与t-约化的关系。第四节研究理想的t-整闭包在环同态下的持续性和压缩性。文中的主要结果均以实例加以说明.

英文摘要:

Let R be an integral domain and I a nonzero ideal of R. A sub-ideal J of I is a t-reduction of I if (JI^{n})_{t}=(I^{n+1})_{t} for some positive integer n. An element x in R is t-integral over I if there is an equation x^{n} + a_{1}x^{n-1} +...+ a_{n-1}x + a_{n} = 0 with a_{i} in (I^{i})_{t} for I = 1,...,n. The set of all elements that are t-integral over I is called the t-integral closure of I. This paper investigates the t-reductions and t-integral closure of ideals. Our objective is to establish satisfactory t-analogues of well-known results, in the literature, on the integral closure of ideals and its correlation with reductions. Namely, Section 2 identifies basic properties of t-reductions of ideals and features explicit examples discriminating between the notions of reduction and t-reduction. Section 3 investigates the concept of t-integral closure of ideals, including its correlation with t-reductions. Section 4 studies the persistence and contraction of t-integral closure of ideals under ring homomorphisms. All along the paper, the main results are illustrated with original examples.

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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