Torsion points of abelian varieties with values in infinite extensions over a p-adic field

Details Torsion points of abelian varieties with values in infinite extensions over a p-adic field Torsion points of abelian varieties with values in infinite extensions over a p-adic field

2008-09-24

arxiv.org/abs/0809.4061v1

Mathematics

Number Theory

Scientific paper

Let $A$ be an abelian variety over a $p$-adic field $K$ and $L$ an algebraic infinite extension over $K$. We consider the finiteness of the torsion part of the group of rational points $A(L)$ under some assumptions. In 1975, Hideo Imai proved that such a group is finite if $A$ has good reduction and $L$ is the cyclotomic $\mathbb{Z}_p$-extension of $K$. In this talk, first we show a generalization of Imai's result in the case where $A$ has ordinary good reduction. Next we give some finiteness results when $A$ is an elliptic curve and $L$ is the field generated by the $p$-power torsion of an elliptic curve.

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