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arXiv 1711.02432math.NT
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利用三次范数方程计算3-等距Selmer群上的Cassels-Tate配对

Computing the Cassels-Tate pairing on 3-isogeny Selmer groups via cubic norm equations

Monique van Beek, Tom Fisher

摘要:

本文介绍了一种计算椭圆曲线上3-等距Selmer群上的Cassels-Tate配对的方法。这将来自3-等距下降的椭圆曲线的秩的上界提高到来自全3-下降的秩的上界。我们的工作的一个组成部分是一个新的算法来解决三次范数方程,避免了任何S-单位计算的需要。作为应用,我们证明了Eroshkin所发现的扭子群阶为3且秩至少为13的椭圆曲线的秩正好为13。

英文摘要:

We explain a method for computing the Cassels-Tate pairing on the 3-isogeny Selmer groups of an elliptic curve. This improves the upper bound on the rank of the elliptic curve coming from a descent by 3-isogeny, to that coming from a full 3-descent. One ingredient of our work is a new algorithm for solving cubic norm equations, that avoids the need for any S-unit computations. As an application, we show that the elliptic curves with torsion subgroup of order 3 and rank at least 13, found by Eroshkin, have rank exactly 13.

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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