On the fields of $2$-power torsion of certain elliptic curves
On the fields of $2$-power torsion of certain elliptic curves
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关于某些椭圆曲线的$2$幂扭转场
DOI:
10.4310/mrl.2004.v11.n4.a10
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发表时间:
2004
影响因子:
1
通讯作者:
C. Rasmussen
中科院分区:
文献类型:
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作者:
C. Rasmussen
Let μ2∞ denote the group of 2-power roots of unity. The outer pro-2 Galois representation on the projective line minus three points has a kernel whose fixed field, Ω2, is a pro-2 extension of Q (μ2∞), unramified away from 2. The fields of 2-power torsion of elliptic curves defined over Q possessing good reduction away from 2 are also pro-2 extensions of Q (μ2∞), unramified away from 2. In this paper, we show that these fields are contained in Ω2. An analogous result is shown for a certain family of elliptic curves defined over Q (μ2∞).