Torsion points of abelian varieties in abelian extensions

Details Torsion points of abelian varieties in abelian extensions Torsion points of abelian varieties in abelian extensions

1998-03-13

arxiv.org/abs/math/9803169v1

Mathematics

Number Theory

Scientific paper

Let A be an abelian variety defined over a number field K and let Kab be the maximal abelian extension of K. We show that there only finitely many torsion points of A which are defined over Kab iff A has no abelian subvariety with complex multiplication over K. We use this to give another proof of Ribet's result that A has only finitely many torsion points which are defined over the cyclotomic extension of K.

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