English

Comparison of different Tate conjectures

Algebraic Geometry 2025-08-04 v4 Number Theory

Abstract

For an abelian variety AA over a finitely generated field KK of characteristic p>0p > 0, we prove that the algebraic rank of AA is at most a suitably defined analytic rank. Moreover, we prove that equality, i.e., the BSD rank conjecture, holds for A/KA/K if and only if a suitably defined Tate--Shafarevich group of A/KA/K (1) has finite \ell-primary component for some/all p\ell \neq p, or (2) finite prime-to-pp part, or (3) has pp-primary part of finite exponent, or (4) is of finite exponent. There is an algorithm to verify those conditions for concretely given A/KA/K.

Keywords

Cite

@article{arxiv.2012.01337,
  title  = {Comparison of different Tate conjectures},
  author = {Veronika Ertl and Timo Keller and Yanshuai Qin},
  journal= {arXiv preprint arXiv:2012.01337},
  year   = {2025}
}
R2 v1 2026-06-23T20:40:41.227Z