English

On the section conjecture and Brauer-Severi varieties

Number Theory 2021-08-04 v1 Algebraic Geometry

Abstract

J. Stix proved that a curve of positive genus over Q\mathbb{Q} which maps to a non-trivial Brauer-Severi variety satisfies the section conjecture. We prove that, if XX is a curve of positive genus over a number field kk and the Weil restriction Rk/QXR_{k/\mathbb{Q}}X admits a rational map to a non-trivial Brauer-Severi variety, then XX satisfies the section conjecture. As a consequence, if XX maps to a Brauer-Severi variety PP such that the corestriction cork/Q([P])Br(Q)\operatorname{cor}_{k/\mathbb{Q}}([P])\in\operatorname{Br}(\mathbb{Q}) is non-trivial, then XX satisfies the section conjecture.

Keywords

Cite

@article{arxiv.2106.07397,
  title  = {On the section conjecture and Brauer-Severi varieties},
  author = {Giulio Bresciani},
  journal= {arXiv preprint arXiv:2106.07397},
  year   = {2021}
}
R2 v1 2026-06-24T03:10:28.972Z