English

Large degree primitive points on curves

Number Theory 2024-11-12 v2

Abstract

A number field KK is called primitive if Q\mathbb Q and KK are the only subfields of KK. Let XX be a nice curve over Q\mathbb Q of genus gg. A point PP of degree dd on XX is called primitive if the field of definition Q(P)\mathbb Q(P) of the point is primitive. In this short note we prove that if XX has a divisor of degree d>2gd> 2g, then XX has infinitely many primitive points of degree dd. This complements the results of Khawaja and Siksek that show that points of low degree are not primitive under certain conditions.

Keywords

Cite

@article{arxiv.2409.05796,
  title  = {Large degree primitive points on curves},
  author = {Maarten Derickx},
  journal= {arXiv preprint arXiv:2409.05796},
  year   = {2024}
}

Comments

6 pages, Extended main result and corrected minor mistakes

R2 v1 2026-06-28T18:38:48.123Z