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arXiv 1301.3563math.NT
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具有给定二次预解式的三次域的狄利克雷级数

Dirichlet series associated to cubic fields with given quadratic resolvent

Henri Cohen, Frank Thorne

摘要:

设k是一个二次域。本文给出了二次预解式域同构于k的三次域的狄利克雷级数计数的一个显式公式。我们的工作是一个续集以前的工作科恩和莫拉,在那里这样的公式证明了在一个更一般的设置,在某些群体有关的束类群字符的总和。本文对此作了进一步的分析,并证明了这类Q上的狄利克雷级数的显式公式。在一个配套文件中,我们做同样的四次领域有一个给定的三次预解式。作为一个应用(在最初的版本中没有),我们计算了S_3-六次域E的个数表,其中|圆盘(E)|< X,对于X,范围为10^23。第二作者的网站上有一个附带的PARI/GP实现。

英文摘要:

Let k be a quadratic field. We give an explicit formula for the Dirichlet series enumerating cubic fields whose quadratic resolvent field is isomorphic to k. Our work is a sequel to previous work of Cohen and Morra, where such formulas are proved in a more general setting, in terms of sums over characters of certain groups related to ray class groups. In the present paper we carry the analysis further and prove explicit formulas for these Dirichlet series over Q. In a companion paper we do the same for quartic fields having a given cubic resolvent. As an application (not present in the initial version), we compute tables of the number of S_3-sextic fields E with |Disc(E)| < X, for X ranging up to 10^23. An accompanying PARI/GP implementation is available from the second author's website.

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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