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Selmer Groups of Elliptic Curves with Complex Multiplication
Published online by Cambridge University Press: 20 November 2018
Abstract
Suppose $K$ is an imaginary quadratic field and
$E$ is an elliptic curve over a number field
$F$ with complex multiplication by the ring of integers in
$K$. Let
$p$ be a rational prime that splits as
${{\mathfrak{p}}_{1}}{{\mathfrak{p}}_{2}}$
in
$K$. Let
${{E}_{{{p}^{n}}}}$
denote the
${{p}^{n}}$-division points on
$E$. Assume that
$F\left( {{E}_{{{p}^{n}}}} \right)$ is abelian over
$K\,\text{for}\,\text{all}\,n\,\ge \,0$. This paper proves that the Pontrjagin dual of the
$\mathfrak{p}_{1}^{\infty }$-Selmer group of
$E$ over
$F\left( {{E}_{{{p}^{\infty }}}} \right)$ is a finitely generated free
$\wedge $-module, where
$\wedge $ is the Iwasawa algebra of
$\text{Gal}\left( F\left( {{E}_{{{p}^{\infty }}}} \right)/F\left( E\mathfrak{p}_{1}^{\infty }{{\mathfrak{p}}_{2}} \right) \right)$
. It also gives a simple formula for the rank of the Pontrjagin dual as a
$\wedge $-module.
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- Research Article
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- Copyright © Canadian Mathematical Society 2004
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