Geodesic
On the hyperspace $C_n(X)/{C_n}_K(X)$
Commentationes Mathematicae Universitatis Carolinae, Tome 62 (2021) no. 2, pp. 201-224.

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Let $X$ be a continuum and $n$ a positive integer. Let $C_n(X)$ be the hyperspace of all nonempty closed subsets of $X$ with at most $n$ components, endowed with the Hausdorff metric. For $K$ compact subset of $X$, define the hyperspace ${C_n}_K(X)=\{A\in C_n(X)\colon K\subset A\}$. In this paper, we consider the hyperspace $C_K^n(X)=C_n(X)/{C_n}_K(X)$, which can be a tool to study the space $C_n(X)$. We study this hyperspace in the class of finite graphs and in general, we prove some properties such as: aposyndesis, local connectedness, arcwise disconnectedness, and contractibility.
DOI : 10.14712/1213-7243.2021.018
Classification : 54B15, 54B20, 54F15
Keywords: hyperspace; continuum; containment hyperspace; aposyndesis; finite graph; Peano continuum; contractibility 
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     title = {On the hyperspace $C_n(X)/{C_n}_K(X)$},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
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Anaya, José G.; Castañeda-Alvarado, Enrique; Martínez-Cortez, José A. On the hyperspace $C_n(X)/{C_n}_K(X)$. Commentationes Mathematicae Universitatis Carolinae, Tome 62 (2021) no. 2, pp. 201-224. doi : 10.14712/1213-7243.2021.018. http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.2021.018/

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