English

The hyperspace of non-cut subcontinua of graphs

General Topology 2025-06-30 v3

Abstract

Given a continuum XX, let C(X)C(X) be the hyperspace of all subcontinua of XX. We consider the hyperspace NC(X)={AC(X):XANC^{*}(X)=\{A\in C(X):X\setminus A is connected}\}. In this paper we prove that the only locally connected continua XX for which NC(X)NC^{*}(X) is compact are the arcs and the simple closed curves. We also characterize the finite graphs GG for which NC(G)NC^{*}(G) is connected.

Keywords

Cite

@article{arxiv.2503.18196,
  title  = {The hyperspace of non-cut subcontinua of graphs},
  author = {Alejandro Illanes and Verónica Martínez-de-la-Vega and Jorge E. Vega},
  journal= {arXiv preprint arXiv:2503.18196},
  year   = {2025}
}