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Orbit transversality for abelian varieties

Kaiwen Lu, Brown University
Monday, September 21, 2026
4:00-5:00 PM
3096 East Hall Map
The dynamical Mordell–Lang problem asks how one forward orbit intersects a subvariety. We consider a complementary question over number fields, allowing passage to a suitable finite extension: can a proper Zariski-closed subset meet every rational grand orbit?
Assuming a Zariski-dense forward orbit, Pasten and Silverman answered this question negatively for linear automorphisms of projective space and for self-morphisms of geometrically simple abelian varieties. We will see that the answer is no for every dominant self-morphism of an abelian variety, without the dense-orbit assumption. If time permits, we will also discuss the case of projective space.
Building: East Hall
Event Type: Lecture / Discussion
Tags: Dynamics, Number Theory
Source: Happening @ Michigan from Complex Analysis, Dynamics and Geometry Seminar - Department of Mathematics, Department of Mathematics