English

$Cp(X)$ for Hattori Spaces

General Topology 2023-09-21 v1

Abstract

Motivated by the main results of the articles by Hattori and Bouziad, we seek to answer the following questions about Hattori spaces. Let A be a subset of the real line, then: Given a compact set KK in the Euclidean topology, under what conditions is KK compact in the Hattori space H(A)H(A)? When is H(A)H(A) a quasi-metrizable space? When is H(A)H(A) a semi-stratifiable space? When is Cp(H(A))C_p(H(A)) a normal space? When is Cp(H(A))C_p(H(A)) a Lindel\"of space? We obtain complete answers for 3 out of these 5 questions, while the last ones remain with partial answers, among them: \ Theorem: If RA\mathbb{R}\setminus A is analytic, then Cp(H(A))C_p(H(A)) is not normal. Moreover when we work on the Solovay Model we can improve the previous result to only require RA\mathbb{R}\setminus A to be uncountable.

Keywords

Cite

@article{arxiv.2309.11045,
  title  = {$Cp(X)$ for Hattori Spaces},
  author = {Elmer Enrique Tovar-Acosta},
  journal= {arXiv preprint arXiv:2309.11045},
  year   = {2023}
}
R2 v1 2026-06-28T12:26:50.274Z