Accessible Requires Authentication Published by De Gruyter March 23, 2011

Root numbers and parity of ranks of elliptic curves

Tim Dokchitser and Vladimir Dokchitser
From the journal


The purpose of the paper is to complete several global and local results concerning parity of ranks of elliptic curves. Primarily, we show that the Shafarevich–Tate conjecture implies the parity conjecture for all elliptic curves over number fields, we give a formula for local and global root numbers of elliptic curves and complete the proof of a conjecture of Kramer and Tunnell in characteristic 0. The method is to settle the outstanding local formulae by deforming from local fields to totally real number fields and then using global parity results.

Received: 2009-11-02
Revised: 2010-04-25
Published Online: 2011-03-23
Published in Print: 2011-September

© Walter de Gruyter Berlin · New York 2011