Contents Online
Mathematical Research Letters
Volume 19 (2012)
Number 5
Elliptic curves with a lower bound on 2-Selmer ranks of quadratic twists
Pages: 1137 – 1143
DOI: https://dx.doi.org/10.4310/MRL.2012.v19.n5.a14
Author
Abstract
For any number field $K$ with a complex place, we present an infinite family of elliptic curves defined over $K$ such that ${\mathrm{dim}_{\mathbb{F}_2}} {\mathrm{Sel}}_2(E^F/K) \ge {\mathrm{dim}_{\mathbb{F}_2}} E^F(K)[2] + r_2$ for every quadratic twist $E^F$ of every curve $E$ in this family, where $r_2$ is the number of complex places of $K$. This provides a counterexample to a conjecture appearing in work of Mazur and Rubin.
Published 15 March 2013