English

Geometric quadratic Chabauty and $p$-adic heights

Number Theory 2024-03-07 v3 Algebraic Geometry

Abstract

Let XX be a curve of genus g>1g>1 over Q\mathbb{Q} whose Jacobian JJ has Mordell--Weil rank rr and N\'eron--Severi rank ρ\rho. When r<g+ρ1r < g+ \rho - 1, the geometric quadratic Chabauty method determines a finite set of pp-adic points containing the rational points of XX. We describe algorithms for geometric quadratic Chabauty that translate the geometric quadratic Chabauty method into the language of pp-adic heights and pp-adic (Coleman) integrals. This translation also allows us to give a comparison to the (original) cohomological method for quadratic Chabauty. We show that the finite set of pp-adic points produced by the geometric method is contained in the finite set produced by the cohomological method, and give a description of their difference.

Keywords

Cite

@article{arxiv.2207.10389,
  title  = {Geometric quadratic Chabauty and $p$-adic heights},
  author = {Juanita Duque-Rosero and Sachi Hashimoto and Pim Spelier},
  journal= {arXiv preprint arXiv:2207.10389},
  year   = {2024}
}

Comments

Update definition of simple open. This clarifies that simple opens are everywhere locally soluble, which is not explicitly noted in the published version