Mordell-Weil groups of a hyperkähler manifold - a question of F. Campana
arXiv:math/0610472
Abstract
Mordell-Weil groups of different abelian fibrations of a hyperkähler manifold may have non-trivial relation even among elements of infinite order, but have essentially no relation, as its birational transformation. Precise definition of the terms "essentially no relation" will be given in Introduction.
9pages