On the Brauer-Siegel ratio for abelian varieties over function fields

Abstract

Hindry has proposed an analogue of the classical Brauer-Siegel theorem for abelian varieties over global fields. Roughly speaking, it says that the product of the regulator of the Mordell-Weil group and the order of the Tate-Shafarevich group should have size similar to the exponential differential height. Hindry-Pacheco and Griffon have proved this for certain families of elliptic curves over function fields using analytic techniques. Our goal in this work is to prove similar results by more algebraic arguments, namely by a direct approach to the Tate-Shafarevich group and the regulator. We recover the results of Hindry-Pacheco and Griffon and extend them to new families, including families of higher-dimensional abelian varieties.

v2: Revisions following referee report, including new material on towers of geometrically Galois extensions. 48 pp

References in corpus (1)

• L-functions with large analytic rank and abelian varieties with large algebraic rank over function fields

Cited by in corpus (2)

• On the $\mu$-invariants of abelian varieties over function fields of positive characteristic
• On the arithmetic of a family of twisted constant elliptic curves