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
中科院分区:
文献类型:
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作者:
A. Sato
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.
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