We study two families of $g$-dimensional abelian varieties, induced by distinct rational maps defined on a common variety $\overline{ \mathcal A}$ and mapping to two bases $\overline{ S}_1$ and $\overline{ S}_2$. Two non-torsion sections induce birational fiberwise translations on $\overline{ \mathcal A}$. We consider the action of a specific subset of the group generated by these translations. Under the assumption that $\operatorname{ dim} \overline{ S}_1 (= \operatorname{ dim} \overline{ S}_2) \leq g$, we prove that the points with finite orbit are contained in a proper Zariski closed subset. This subset is explicitly described to a certain extent. Our results generalize a theorem of Corvaja, Tsimermann, and Zannier to higher dimensions.

Categories: math.NT math.AG

Finite translation orbits on double families of abelian varieties (with an appendix by E. Amerik)