English

Models and Integral Differentials of Hyperelliptic Curves

Number Theory 2024-11-20 v3 Algebraic Geometry

Abstract

Let C:y2=f(x)C: y^2=f(x) be a hyperelliptic curve of genus g1g\geq 1, defined over a complete discretely valued field KK, with ring of integers OKO_K. Under certain conditions on CC, mild when residue characteristic is not 22, we explicitly construct the minimal regular model with normal crossings C/OK\mathcal{C}/O_K of CC. In the same setting we determine a basis of integral differentials of CC, that is an OKO_K-basis for the global sections of the relative dualising sheaf ωC/OK\omega_{\mathcal{C}/O_K}.

Keywords

Cite

@article{arxiv.2003.01830,
  title  = {Models and Integral Differentials of Hyperelliptic Curves},
  author = {Simone Muselli},
  journal= {arXiv preprint arXiv:2003.01830},
  year   = {2024}
}

Comments

Introduction changed, general improvement; 57 pages

R2 v1 2026-06-23T14:03:00.212Z