A geometric linear Chabauty comparison theorem
Abstract
The Chabauty-Coleman method is a -adic method for finding all rational points on curves of genus whose Jacobians have Mordell-Weil rank . Recently, Edixhoven and Lido developed a geometric quadratic Chabauty method that was adapted by Spelier to cover the case of geometric linear Chabauty. We compare the geometric linear Chabauty method and the Chabauty-Coleman method and show that geometric linear Chabauty can outperform Chabauty-Coleman in certain cases. However, as Chabauty-Coleman remains more practical for general computations, we discuss how to strengthen Chabauty-Coleman to make it theoretically equivalent to geometric linear Chabauty. We apply these methods to genus 2 and genus 3 curves.
Cite
@article{arxiv.2102.04967,
title = {A geometric linear Chabauty comparison theorem},
author = {Sachi Hashimoto and Pim Spelier},
journal= {arXiv preprint arXiv:2102.04967},
year = {2021}
}
Comments
fixed minor issues and updated exposition; to appear in Acta Arithmetica