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arXiv 1306.0027math.NT
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具有torsion group Z/8Z或Z/2Z x Z/6Z的椭圆曲线

Elliptic curves with torsion group Z/8Z or Z/2Z x Z/6Z

Andrej Dujella, Juan Carlos Peral

摘要:

证明了对于挠群Z/8 Z和Z/2 Z × Z/6 Z,存在通有秩至少为2的Q上的椭圆曲线族.此外,在这两种情况下,我们证明了存在的无穷多个椭圆曲线,这是参数化的椭圆曲线的点与正秩,这样的扭转群和秩至少为3。这些结果代表了改进以前的结果坎贝尔,Kulesz,Lecacheux,Dujella和Rabarison在两种情况下,其中家庭的排名至少为1。

英文摘要:

We show the existence of families of elliptic curves over Q whose generic rank is at least 2 for the torsion groups Z/8Z and Z/2Z x Z/6Z. Also in both cases we prove the existence of infinitely many elliptic curves, which are parameterized by the points of an elliptic curve with positive rank, with such torsion group and rank at least 3. These results represent an improvement of previous results by Campbell, Kulesz, Lecacheux, Dujella and Rabarison where families with rank at least 1 were constructed in both cases.

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