Period, index and potential sha

Period, index and potential sha
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周期、指数及潜力股

DOI:
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发表时间:
2008
期刊:
arXiv: Number Theory
影响因子:
--
通讯作者:
Shahed Sharif
Shahed Sharif
中科院分区:
--
文献类型:
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作者:
P. L. Clark;Shahed Sharif

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本文提出了O 'Neil周期指数阻塞映射的理论,并导出了全局域上亏格为1的曲线的算法。我们的第一个结果意味着对每对正整数(P,I),其中P整除I,I整除P^2,存在数域K和K上的亏格为1的曲线C,其周期为P,指数为I。其次,设E是整体域K上的任意椭圆曲线,P > 1是被K的特征线整除的任意整数。我们在K上构造了无限多个亏格为1的曲线C,其周期为P,指数为P^2,雅可比矩阵为E。我们推导出强烈的后果的结构Sharevich-Tate群下的字段扩展。
In this paper we advance the theory of O'Neil's period-index obstruction map and derive consequences for the arithmetic of genus one curves over global fields. Our first result implies that for every pair of positive integers (P,I) with P dividing I and I dividing P^2, there exists a number field K and a genus one curve C over K with period P and index I. Second, let E be any elliptic curve over a global field K, and let P > 1 be any integer indivisible by the characteristic of K. We construct infinitely many genus one curves C over K with period P, index P^2, and Jacobian E. We deduce strong consequences on the structure of Sharevich-Tate groups under field extension.
关于椭圆曲线 Tate-Shafarevich 群的 p 秩
DOI: --
发表时间: 2005
期刊:
影响因子: --
作者:
塩濱勝博;成慶明;松野 一夫
通讯作者: 松野 一夫