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arXiv 2201.03751math.NT
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数域上高阶矩的局部到整体原理

Local to global principle over number fields for higher moments

Giacomo Micheli, Severin Schraven, Simran Tinani, Violetta Weger

摘要:

密度的局部到全局原理是Poonen和Stoll提出的一个非常方便的工具,用于计算给定整数子集的密度。本文提供了一个有效的准则来求数域的代数整数环上有限维自由模子集的密度的所有高次矩(例如均值、方差)。更确切地说,我们提供了一个本地到全球的原则,允许计算的所有更高的时刻对应的密度,在一般的数域$K$。本文的工作从两个方面推进了对密度计算的局部到整体原理的理解:一方面,推广了Bright,Browning和Loughran的结果,他们给出了数域上密度的局部到整体原理;另一方面,在一个实施例中,它将最近关于整数期望值的局部到整体原理的结果推广到代数整数的代数整数环和高阶矩大于期望值。为了说明本文方法的有效性和实用性,我们计算了数域上的艾森斯坦多项式和移位的艾森斯坦多项式的密度、均值和方差.这扩展(并完全覆盖)的结果,在文献中获得的特设的方法。

英文摘要:

The local to global principle for densities is a very convenient tool proposed by Poonen and Stoll to compute the density of a given subset of the integers. In this paper we provide an effective criterion to find all higher moments of the density (e.g. the mean, the variance) of a subset of a finite dimensional free module over the ring of algebraic integers of a number field. More precisely, we provide a local to global principle that allows the computation of all higher moments corresponding to the density, over a general number field $K$. This work advances the understanding of local to global principles for density computations in two ways: on one hand, it extends a result of Bright, Browning and Loughran, where they provide the local to global principle for densities over number fields; on the other hand, it extends the recent result on a local to global principle for expected values over the integers to both the ring of algebraic integers and to moments higher than the expected value. To show how effective and applicable our method is, we compute the density, mean and variance of Eisenstein polynomials and shifted Eisenstein polynomials over number fields. This extends (and fully covers) results in the literature that were obtained with ad-hoc methods.

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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