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Is a Distance One Preserving Mapping between Metric Spaces Always an Isometry? - MaRDI portal

Is a Distance One Preserving Mapping between Metric Spaces Always an Isometry? (Q3657047)

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Is a Distance One Preserving Mapping between Metric Spaces Always an Isometry?
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    Is a Distance One Preserving Mapping between Metric Spaces Always an Isometry? (English)
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