English

Flimsy Spaces

General Topology 2025-11-25 v1

Abstract

We study nn-flimsy spaces, which are the topological spaces that remain connected when removing fewer than nn points but become disconnected when removing exactly nn points. We show that no such space exists for n3n \geq 3, and that the compact 22-flimsy spaces are precisely the dense and order-complete cyclically ordered sets equipped with their order topology. Furthermore, we examine variants of the definition obtained by replacing connectedness by path-connectedness, where paths are either parametrized by [0,1][0,1] or by arbitrary compact linear continua.

Keywords

Cite

@article{arxiv.2511.17745,
  title  = {Flimsy Spaces},
  author = {Robin Khanfir and Béranger Seguin},
  journal= {arXiv preprint arXiv:2511.17745},
  year   = {2025}
}

Comments

38 pages, 7 figures, 3 diagrams

R2 v1 2026-07-01T07:49:42.473Z