On the class numbers of certain number fields obtained from points on elliptic curves

On the class numbers of certain number fields obtained from points on elliptic curves
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关于由椭圆曲线上的点得到的某些数域的类数

DOI:
10.18910/10373
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发表时间:
2001
影响因子:
0.4
通讯作者:
A. Sato
A. Sato
中科院分区:
数学4区
文献类型:
--
作者:
A. Sato

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本文研究了由椭圆曲线的等距线所引起的数域扩张中的分歧。特别地,我们从一个椭圆曲线与一个合理的扭点,并表明,该扩展是unramified艾德当且仅当“的点,产生的扩展是减少到一个非奇异点(我们需要假设一定的条件,以证明“只有当“的部分)。我们还研究了类数可被5整除的二次数域的一个特征.
We study the ramifications in the extensions of number fields a rising from an isogeny of elliptic curves. In particular, we start with an e lliptic curve with a rational torsion point, and show that the extension is unramifi ed if and “only if ” the point which generates the extension is reduced into a nonsingular point (we need to assume certain conditions in order to prove the “only if ” part). We also study a characterization of quadratic number fields with class numb ers divisible by 5.
旗品种的 Hardy-Littlewood 特性
DOI: --
发表时间: 2003
期刊: Nagoya Math.J. 170
影响因子: --
作者:
T.Watanabe
通讯作者: T.Watanabe