An Intrinsic Characterization of Five Points in a CAT(0) Space
Gromov (2001) and Sturm (2003) proved that any four points in a CAT(0) space satisfy a certain family of inequalities. We call those inequalities the ⊠-inequalities, following the notation used by Gromov. In this paper, we prove that a metric space X containing at most five points admits an isometri...
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| Format: | Article |
| Language: | English |
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De Gruyter
2020-08-01
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| Series: | Analysis and Geometry in Metric Spaces |
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| Online Access: | https://doi.org/10.1515/agms-2020-0111 |