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arXiv 1807.01744math.NT
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数域Galois扩张的Chebotarev密度公式

Formulas for Chebotarev densities of Galois extensions of number fields

Naomi Sweeting, Katharine Woo

摘要:

我们将Dawsey(2017)和Alladi(1977)的Chebotarev密度公式推广到数域$L/K$的任意有限Galois扩张的情形。特别是,如果$C \subset G = \textrm{Gal}(L/K)$是一个共轭类,那么我们建立Chebotarev密度是以下极限的部分和的理想$K$:\[ -\lim_{X\rightarrow\infty} \sum_{\substack{2\leq N(I)\leq X \\ I \in S(L/K; C)}} \frac{μ_K(I)}{N(I)} = \frac{|C|}{|G|}, \]其中$μ_K(I)$表示广义莫比乌斯函数和$S(L/K;C)$是一组理想$I\subset \mathcal{O}_K$,使$I$有一个唯一的素因子$\mathfrak{p}$的最小范数和阿丁符号$\left[\frac{L/K}{\mathfrak{p}}\right]$是$C$。为了得到这个公式,我们推广了几个结果,从经典的解析数论,以及阿拉迪的概念的对偶最小和最大的素因子,设置的理想在数域。

英文摘要:

We generalize the Chebotarev density formulas of Dawsey (2017) and Alladi (1977) to the setting of arbitrary finite Galois extensions of number fields $L/K$. In particular, if $C \subset G = \textrm{Gal}(L/K)$ is a conjugacy class, then we establish that the Chebotarev density is the following limit of partial sums of ideals of $K$: \[ -\lim_{X\rightarrow\infty} \sum_{\substack{2\leq N(I)\leq X \\ I \in S(L/K; C)}} \frac{μ_K(I)}{N(I)} = \frac{|C|}{|G|}, \] where $μ_K(I)$ denotes the generalized Möbius function and $S(L/K;C)$ is the set of ideals $I\subset \mathcal{O}_K$ such that $I$ has a unique prime divisor $\mathfrak{p}$ of minimal norm and the Artin symbol $\left[\frac{L/K}{\mathfrak{p}}\right]$ is $C$. To obtain this formula, we generalize several results from classical analytic number theory, as well as Alladi's concept of duality for minimal and maximal prime divisors, to the setting of ideals in number fields.

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