Simplicial arrangements with few double points
Combinatorics
2025-10-21 v2 Algebraic Geometry
Geometric Topology
Abstract
In their solution to the orchard-planting problem, Green and Tao established a structure theorem which proves that in a line arrangement in the real projective plane with few double points, most lines are tangent to the dual curve of a cubic curve. We provide geometric arguments to prove that in the case of a simplicial arrangement, the aforementioned cubic curve cannot be irreducible. It follows that Gr\"{u}nbaum's conjectural asymptotic classification of simplicial arrangements holds under the additional hypothesis of a linear bound on the number of double points.
Cite
@article{arxiv.2409.01892,
title = {Simplicial arrangements with few double points},
author = {Dmitri Panov and Guillaume Tahar},
journal= {arXiv preprint arXiv:2409.01892},
year = {2025}
}
Comments
16 pages, 5 figures, Discrete & Computational Geometry