English

Constructing all Genus 2 Curves with Supersingular Jacobian

Algebraic Geometry 2022-04-08 v3

Abstract

L. Moret-Bailly constructed families CP1\mathfrak{C}\rightarrow \mathbb{P}^1 of genus 2 curves with supersingular jacobian. In this paper we first classify the reducible fibers of a Moret-Bailly family using linear algebra over a quaternion algebra. The main result is an algorithm that exploits properties of two reducible fibers to compute a hyperelliptic model for any irreducible fiber of a Moret-Bailly family.

Keywords

Cite

@article{arxiv.2105.13752,
  title  = {Constructing all Genus 2 Curves with Supersingular Jacobian},
  author = {Andreas Pieper},
  journal= {arXiv preprint arXiv:2105.13752},
  year   = {2022}
}

Comments

28 pages. MAGMA Code is available on GitHub

R2 v1 2026-06-24T02:34:03.913Z