Banakh spaces and their geometry
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arXiv
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866915918094794752 |
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| author | Banakh, Taras |
| author_facet | Banakh, Taras |
| contents | Following Will Brian, we define a metric space $X$ to be $Banakh$ if all nonempty spheres of positive radius $r$ in $X$ have cardinality $2$ and diameter $2r$. Standard examples of Banakh spaces are subgroups of the real line. In this paper we study the geometry of Banakh spaces, characterize Banakh spaces which are isometric to subgroups of the real line, and also construct Banakh spaces $(X,d)$ which do not embed into the real line and have a prescribed distance set $d[X^2]$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_07354 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Banakh spaces and their geometry Banakh, Taras General Topology Metric Geometry 30L05, 46B85, 51F20, 54C35, 54E50 Following Will Brian, we define a metric space $X$ to be $Banakh$ if all nonempty spheres of positive radius $r$ in $X$ have cardinality $2$ and diameter $2r$. Standard examples of Banakh spaces are subgroups of the real line. In this paper we study the geometry of Banakh spaces, characterize Banakh spaces which are isometric to subgroups of the real line, and also construct Banakh spaces $(X,d)$ which do not embed into the real line and have a prescribed distance set $d[X^2]$. |
| title | Banakh spaces and their geometry |
| topic | General Topology Metric Geometry 30L05, 46B85, 51F20, 54C35, 54E50 |
| url | https://arxiv.org/abs/2305.07354 |