English

Interpolation of low degree points on curves

Algebraic Geometry 2025-08-07 v1 Number Theory

Abstract

We study points of moderately low degree on a curve CC over a number field, which is embedded on a nice toric surface SS. Recently, Smith and Vogt related the linear equivalence classes of such points to intersections of CC with curves in the ambient surface. We show that when CC is sufficiently effective and ample with simple singularities, all but finitely many sufficiently low degree points are obtained via intersections of CC with curves in the ambient surface SS. Our methods make use of the toric geometry of the ambient surface SS to produce curves which interpolate the low degree points on CC. Furthermore, we generalise a result by Debarre and Klassen to singular plane curves and higher degrees of points.

Keywords

Cite

@article{arxiv.2508.04426,
  title  = {Interpolation of low degree points on curves},
  author = {Eden Granot},
  journal= {arXiv preprint arXiv:2508.04426},
  year   = {2025}
}