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Unirationality of hypersurfaces via highly tangent lines

Algebraic Geometry 2025-11-12 v1

Abstract

This article describes a unirationality construction for general low degree complete intersections in projective space which is based on a variety of highly tangent lines. Applied to hypersurfaces, this implies that a general hypersurface of degree d6d \geq 6 in projective nn-space is unirational as soon as n2(d1)2d5n \geq 2^{(d-1)2^{d-5}}, significantly improving classical bounds.

Keywords

Cite

@article{arxiv.2511.07545,
  title  = {Unirationality of hypersurfaces via highly tangent lines},
  author = {Raymond Cheng},
  journal= {arXiv preprint arXiv:2511.07545},
  year   = {2025}
}

Comments

18 pages, comments very welcome!