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arXiv 2101.02673math.NT
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二次域上素度的显式同构

Explicit isogenies of prime degree over quadratic fields

Barinder S. Banwait

摘要:

设$K$是一个二次域,它不是类数为1的虚二次域。我们描述了一个算法来计算素数$p$,其中存在一个椭圆曲线在$K$上,允许一个$K$ -有理$p$ -等距。这是建立在David,Larson-Vaintrob和Momose的工作基础上的。结合这个算法和Bruin-Najman、Özman-Siksek以及最近的Box的工作,我们确定了三个二次域$\mathbb{Q}(\sqrt{-10})$、$\mathbb{Q}(\sqrt{5})$和$\mathbb{Q}(\sqrt{7})$的素数集合,这是Mazur在1978年确定$K = \mathbb{Q}$之后的第一个这样的例子。算法的终止依赖于广义黎曼假设。

英文摘要:

Let $K$ be a quadratic field which is not an imaginary quadratic field of class number one. We describe an algorithm to compute the primes $p$ for which there exists an elliptic curve over $K$ admitting a $K$-rational $p$-isogeny. This builds on work of David, Larson-Vaintrob, and Momose. Combining this algorithm with work of Bruin-Najman, Özman-Siksek, and most recently Box, we determine the above set of primes for the three quadratic fields $\mathbb{Q}(\sqrt{-10})$, $\mathbb{Q}(\sqrt{5})$, and $\mathbb{Q}(\sqrt{7})$, providing the first such examples after Mazur's 1978 determination for $K = \mathbb{Q}$. The termination of the algorithm relies on the Generalised Riemann Hypothesis.

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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