English

Four classic problems

Metric Geometry 2022-02-22 v1

Abstract

In this work we survey four classic problems: Borsuk's partition problem, Tarski's plank problem, the Kneser--Poulsen problem on the monotonicity of the union of balls under a contraction of their centers, and the Hadwiger--Levi problem on covering convex bodies by their smaller positively homothetic copies.

Keywords

Cite

@article{arxiv.2202.09863,
  title  = {Four classic problems},
  author = {Gábor Fejes Tóth and Włodzimierz. Kuperberg},
  journal= {arXiv preprint arXiv:2202.09863},
  year   = {2022}
}
R2 v1 2026-06-24T09:46:37.316Z