English

On Helly number for crystals and cut-and-project sets

Metric Geometry 2024-02-14 v5 Combinatorics

Abstract

We prove existence of Helly numbers for crystals and for cut-and-project sets with convex windows. Also we show that for a two-dimensional crystal consisting of kk copies of a single lattice the Helly number does not exceed k+6k+6.

Cite

@article{arxiv.1605.07881,
  title  = {On Helly number for crystals and cut-and-project sets},
  author = {Alexey Garber},
  journal= {arXiv preprint arXiv:1605.07881},
  year   = {2024}
}
R2 v1 2026-06-22T14:09:17.061Z