English

Hyperspaces $C(p,X)$ of finite graphs

General Topology 2019-08-20 v1

Abstract

Given a continuum XX and pXp\in X, we will consider the hyperspace C(p,X)C(p,X) of all subcontinua of XX containing pp and the family K(X)K(X) of all hyperspaces C(q,X)C(q,X), where qXq\in X. In this paper we give some conditions on the points p,qXp,q\in X to guarantee that C(p,X)C(p,X) and C(q,X)C(q,X) are homeomorphic, for finite graphs XX. Also, we study the relationship between the homogeneity degree of a finite graph XX and the number of topologically distinct spaces in K(X)K(X), called the size of K(X)K(X). In addition, we construct for each positive integer nn, a finite graph XnX_n such that K(Xn)K(X_n) has size nn, and we present a theorem that allows to construct finite graphs XX with a degree of homogeneity different from the size of the family K(X)K(X).

Keywords

Cite

@article{arxiv.1905.00564,
  title  = {Hyperspaces $C(p,X)$ of finite graphs},
  author = {Florencio Corona-Vázquez and Russell Aarón Quiñones Estrella and Javier Sánchez-Martínez and Hugo Villanueva},
  journal= {arXiv preprint arXiv:1905.00564},
  year   = {2019}
}

Comments

16 pages

R2 v1 2026-06-23T08:54:49.387Z