Isogeny graphs of abelian varieties and singular ideals of orders

par Stefano Marseglia

jeudi 4 déc. 2025, 14:00 → 15:00 Europe/Paris

We will present a structure theorem for the lattice of inclusions of the overorders of an order in an étalé algebra admitting a multiplicator ladder, a property satisfied by any Bass orders. We will then present a generalisation of some results about isogeny graphs of abelian varieties over finite fields given by Brooks-Jetchev-Wesolowski.