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arXiv 2107.09013math.NT
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Q的循环立方扩张

Cyclic Cubic Extensions of Q

Dipramit Majumdar, B. Sury

摘要:

本文明确地描述了不可约三项式X^3-aX+b,它给出了Q的所有循环三次扩张。在这样做时,我们构造曲线X^2+3Y^2 = 4DZ^3和X^2+27Y^2 = 4DZ^3的所有整数点(x,y,z),其中GCD(y,z)=1,当D在无立方正整数上变化时。我们使用众所周知的曲线X^2+3Y^2=4Z^3的积分点(x,y,z)的参数化来参数化这些点,其中GCD(y,z)=1。作为我们的结果的一个意外的副产品,我们表明,有无穷多个素数全等1或8模9,可以表示为两个有理立方的总和。

英文摘要:

In this article we explicitly describe irreducible trinomials X^3-aX+b which gives all the cyclic cubic extensions of Q. In doing so, we construct all integral points (x,y,z) with GCD(y,z)=1, of the curves X^2+3Y^2 = 4DZ^3 and X^2+27Y^2=4DZ^3 as D varies over cube-free positive integers. We parametrise these points using well known parametrisation of integral points (x,y,z) of the curve X^2+3Y^2=4Z^3 with GCD(y,z)=1. As an accidental byproduct of our result we show that there are infinitely many primes congruent to 1 or 8 modulo 9, can be expressed as sum of two rational cubes.

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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