中文

具有许多有理点且亏格与维数较小的三元与四元曲线

数论 2022-05-03 v2

摘要

我们将之前论文 arXiv:2005.07054 中的计算扩展至确定 F3\mathbb{F}_3F4\mathbb{F}_4 上固定维数(gonality)且小亏格曲线上有理点的最大数量。例如,我们发现有限域上不存在亏格5且维数6的曲线。我们基于数据提出两个猜想。第一,亏格为 gg 的最优曲线其维数至多为 g+32\lfloor \frac{g+3}{2} \rfloor。第二,Fq\mathbb{F}_q 上维数为 γ\gamma 且大亏格的曲线具有 γ(q+1)\gamma(q+1) 个有理点。

关键词

引用

@article{arxiv.2010.07992,
  title  = {Ternary and Quaternary Curves of Small Fixed Genus and Gonality with Many Rational Points},
  author = {Xander Faber and Jon Grantham},
  journal= {arXiv preprint arXiv:2010.07992},
  year   = {2022}
}

备注

Final published version as it will appear in Experimental Mathematics; 19 pages; code available at https://github.com/RationalPoint/gonality [Note that an error was corrected since the previous version: up to isomorphism, there is exactly 1 curve of genus 4 and gonality 5 over GF(3).]