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arXiv 0908.1741math.NT
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椭圆曲线的2-、3-和4-覆盖的极小化和约化

Minimisation and reduction of 2-, 3- and 4-coverings of elliptic curves

John Cremona, Tom Fisher, Michael Stoll

摘要:

在本文中,我们考虑模型的亏格1曲线的次数n(n = 2,3和4),这出现在显式n下降的椭圆曲线。我们证明定理的存在性极小模型具有相同的不变量的最小模型的雅可比椭圆曲线,并提供简单的算法,最小化一个给定的模型,有效的一般数域。最后,对于定义在Q上的亏格1模型,我们发展了一个约简理论,并再次给出了n = 2,3,4的显式算法。

英文摘要:

In this paper we consider models for genus one curves of degree n for n = 2, 3 and 4, which arise in explicit n-descent on elliptic curves. We prove theorems on the existence of minimal models with the same invariants as the minimal model of the Jacobian elliptic curve and provide simple algorithms for minimising a given model, valid over general number fields. Finally, for genus one models defined over Q, we develop a theory of reduction and again give explicit algorithms for n = 2, 3 and 4.

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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