arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1204.3575math.NT
收藏

关于具有非平凡子域的数域

On number fields with nontrivial subfields

Martin Widmer

摘要:

复次数$d$数域有非平凡子域的概率是多少?正如读者所料,答案在很大程度上取决于对概率的解释。我们表明,如果字段枚举的最小高度,其生成器的概率为零,至少如果$d>6$。这与当字段由判别式枚举时所期望的相反。本文的主要结果是一个估计的代数数的程度$d=e n$和有界的高度,产生一个领域,其中包含一个未指定的子域的程度$e$。如果是$n>\max\{e^2+e,10\}$,我们得到正确的渐近,因为高度趋于无穷大。

英文摘要:

What is the probability for a number field of composite degree $d$ to have a nontrivial subfield? As the reader might expect the answer heavily depends on the interpretation of probability. We show that if the fields are enumerated by the smallest height of their generators the probability is zero, at least if $d>6$. This is in contrast to what one expects when the fields are enumerated by the discriminant. The main result of this article is an estimate for the number of algebraic numbers of degree $d=e n$ and bounded height which generate a field that contains an unspecified subfield of degree $e$. If $n>\max\{e^2+e,10\}$ we get the correct asymptotics as the height tends to infinity.

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。

↑