English

The hyperspace of non-cut subcontinua of graphs and dendrites

General Topology 2024-01-08 v6

Abstract

Given a continuum XX, let C(X)C(X) denote the hyperspace of all subcontinua of XX. In this paper we study the Vietoris hyperspace NC(X)={AC(X):XA is connected}NC^{*}(X)=\{ A \in C(X):X\setminus A\text{ is connected}\} when XX is a finite graph or a dendrite; in particular, we give conditions under which NC(X)NC^{*}(X) is compact, connected, locally connected or totally disconnected. Also, we prove that if XX is a dendrite and the set of endpoints of XX is dense, then NC(X)NC^{*}(X) is homeomorphic to the Baire space of irrational numbers.

Keywords

Cite

@article{arxiv.2108.06020,
  title  = {The hyperspace of non-cut subcontinua of graphs and dendrites},
  author = {Rodrigo Hernández-Gutiérrez and Verónica Martínez-de-la-Vega and Jorge M. Martínez-Montejano and Jorge E. Vega},
  journal= {arXiv preprint arXiv:2108.06020},
  year   = {2024}
}