Isogenies of Degree $p$ of Elliptic Curves over Local Fields and Kummer Theory
Isogenies of Degree $p$ of Elliptic Curves over Local Fields and Kummer Theory
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局部域上椭圆曲线的次数$p$同构与Kummer理论
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发表时间:
2002
期刊:
影响因子:
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通讯作者:
Mayumi Kawachi
中科院分区:
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作者:
Mayumi Kawachi
. Let p be a prime number. In order to calculate the Selmer group of a p -isogeny ν : E → E (cid:2) of elliptic curves, we determine the image of a local Kummer map E (cid:2) (K)/νE(K) → H 1 (K, ker ν) over a finite extension K of Q p . We describe the image using a filtration on a unit group of a local field and the valuation of a coefficient of a leading term in a formal power series of an isogeny.