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arXiv 2009.09274math.NT
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函数域上$D_4$四次数和伽罗瓦群偏置的计数

Enumerating $D_4$ Quartics and a Galois Group Bias Over Function Fields

Daniel Keliher

摘要:

本文给出了判别式等于某个界的函数域的$D_4$四次扩张的个数的渐近公式,基本上再现了Cohen,Diaz y Diaz和Olivier在数域上的类似结果,但具有更强的误差项.我们还研究了函数场的$D_4$和$S_4$四次扩张的相对密度,并证明了在适当的条件下,$D_4$的四次扩张的个数可以远远超过$S_4$的四次扩张的个数

英文摘要:

We give an asymptotic formula for the number of $D_4$ quartic extensions of a function field with discriminant equal to some bound, essentially reproducing the analogous result over number fields due Cohen, Diaz y Diaz, and Olivier, but with a stronger error term. We also study the relative density of $D_4$ and $S_4$ quartic extensions of a function field and show that with mild conditions, the number of $D_4$ quartic extensions can far exceed the number of $S_4$ quartic extensions

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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