On covering properties of end and ray spaces

We provide new results on combinatorial characterizations of covering properties in end spaces and ray spaces. In particular, we characterize the Lindelöf degree, the extent, the Rothberger property, $σ$-compactness and the Menger property for ray, end and edge-end spaces. We show that $σ$-compactness and the Menger property are equivalent for these spaces, and that they are all $D$-spaces. As an application of some of these characterizations, we are able to provide combinatorial characterizations of graphs with countably many ends and edge-ends.

Publication Details

Journal
ArXiv.org
Published
2025-10-12
Primary Topic
Ancient and Medieval Archaeology Studies
Type
article
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article

On covering properties of end and ray spaces

ArXiv.org
Ancient and Medieval Archaeology Studies
article

On covering properties of end and ray spaces

article en

Abstract

We provide new results on combinatorial characterizations of covering properties in end spaces and ray spaces. In particular, we characterize the Lindelöf degree, the extent, the Rothberger property, $σ$-compactness and the Menger property for ray, end and edge-end spaces. We show that $σ$-compactness and the Menger property are equivalent for these spaces, and that they are all $D$-spaces. As an application of some of these characterizations, we are able to provide combinatorial characterizations of graphs with countably many ends and edge-ends.

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On covering properties of end and ray spaces · ArXiv.org (2025) | TGRS Research Map | TGRS