Period, index and potential, III
Period, index and potential, III
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周期、指数和潜力,III
DOI:
10.2140/ant.2010.4.151
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发表时间:
2008
影响因子:
1.3
通讯作者:
Shahed Sharif
中科院分区:
文献类型:
--
作者:
P. L. Clark;Shahed Sharif
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 | I | P 2, there exists a number field K and a genus one curve C/K with period P and index I. Second, let E/K 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/K with period P , index P 2, and Jacobian E. We deduce strong consequences on the structure of Shafarevich-Tate groups under field extension.
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