On a conjecture of Mazur predicting the growth of Mordell--Weil ranks in ${\mathbb{Z}}_p$-extensions

Abstract

Let $p$ be an odd prime. We study Mazur's conjecture on the growth of the Mordell--Weil ranks of an elliptic curve $E/\mathbb{Q}$ over ${\mathbb{Z}}_p$-extensions of an imaginary quadratic field, where $p$ is a prime of good reduction for $E$. In particular, we obtain criteria that may be checked through explicit calculation, thus allowing for the verification of Mazur's conjecture in specific examples.

21 pages; to appear in Mathematical Research Letters