English

Quintic threefolds with triple points

Algebraic Geometry 2019-11-13 v1

Abstract

We study the geometry of quintic threefolds XP4X\subset \mathbb{P}^4 with only ordinary triple points as singularities. In particular, we show that if a quintic threefold XX has a reducible hyperplane section then XX has at most 1010 ordinary triple points, and that this bound is sharp. We construct various examples of quintic threefolds with triple points and discuss their defect.

Keywords

Cite

@article{arxiv.1712.05710,
  title  = {Quintic threefolds with triple points},
  author = {Remke Kloosterman and Slawomir Rams},
  journal= {arXiv preprint arXiv:1712.05710},
  year   = {2019}
}
R2 v1 2026-06-22T23:19:27.528Z