English

No transcendental Brauer-Manin obstructions on abelian varieties

Number Theory 2018-04-27 v3

Abstract

Suppose XX is a torsor under an abelian variety AA over a number field. We show that any adelic point of XX that is orthogonal to the algebraic Brauer group of XX is orthogonal to the whole Brauer group of XX. We also show that if there is a Brauer-Manin obstruction to the existence of rational points on XX, then there is already an obstruction coming from the locally constant Brauer classes. These results had previously been established under the assumption that AA has finite Tate-Shafarevich group. Our results are unconditional.

Keywords

Cite

@article{arxiv.1711.01541,
  title  = {No transcendental Brauer-Manin obstructions on abelian varieties},
  author = {Brendan Creutz},
  journal= {arXiv preprint arXiv:1711.01541},
  year   = {2018}
}

Comments

v3: Fixed a gap in the proof of Lemma 13, and other minor changes