English

Coloring triangles and rectangles

Logic 2022-04-14 v2

Abstract

It is consistent that ZF+DC holds, the hypergraph of rectangles on a given Euclidean space has countable chromatic number, while the hypergraph of equilateral triangles in two-dimensional Euclidean space does not.

Keywords

Cite

@article{arxiv.2108.09845,
  title  = {Coloring triangles and rectangles},
  author = {Jindrich Zapletal},
  journal= {arXiv preprint arXiv:2108.09845},
  year   = {2022}
}
R2 v1 2026-06-24T05:19:42.554Z