Dane publikacji
Tom 173
Zeszyt 1
Czasopismo: Colloquium Mathematicum
Strony: 57-75
Data publikacji online: 27.03.2023
Liczba wyświetleń: 0
Liczba pobrań: 0
Abstrakt
Given a continuum $X$, let $C(X)$ denote the hyperspace of all subcontinua of $X$. In this paper we study the Vietoris hyperspace $NC^{*}(X)=\{ A \in C(X):X\setminus A$ is connected$\}$ when $X$ is a finite graph or a dendrite; in particular, we give conditions under which $NC^{*}(X)$ is compact, connected, locally connected or totally disconnected. Also, we prove that if $X$ is a dendrite and the set of endpoints of $X$ is dense, then $NC^{*}(X)$ is homeomorphic to the Baire space of irrational numbers.