English

Effective Chabauty for symmetric powers of curves

Number Theory 2016-06-17 v1 Algebraic Geometry

Abstract

Faltings' theorem states that curves of genus g2g \geq 2 have finitely many rational points. Using the ideas of Faltings, Mumford, Parshin and Raynaud, one obtains an upper bound on the number of rational points, but this bound is too large to be used in any reasonable sense. In 1985, Coleman showed that Chabauty's method, which works when the Mordell-Weil rank of the Jacobian of the curve is smaller than gg, can be used to give a good effective bound on the number of rational points of curves of genus g>1g > 1. We draw ideas from nonarchimedean geometry to show that we can also give an effective bound on the number of rational points outside of the special set of dd-th symmetric power of XX, where XX is a curve of genus g>dg > d, when the Mordell-Weil rank of the Jacobian of the curve is at most gdg-d and the curve further satisfies certain rigid analytic conditions.

Keywords

Cite

@article{arxiv.1606.05195,
  title  = {Effective Chabauty for symmetric powers of curves},
  author = {Jennifer Park},
  journal= {arXiv preprint arXiv:1606.05195},
  year   = {2016}
}