%0 Journal Article %T Ranks of elliptic curves in families of quadratic twists %A Karl Rubin %A Alice Silverberg %J Mathematics %D 1999 %I arXiv %X We show that the unboundedness of the ranks of the quadratic twists of an elliptic curve is equivalent to the divergence of certain infinite series. %U http://arxiv.org/abs/math/9912249v1