On a characteristic property of isometric mappings. (English. Russian original) Zbl 0336.54029
Sov. Math., Dokl. 17, 43-45 (1976); translation from Dokl. Akad. Nauk SSSR 226, 48-50 (1976).
MSC:
54E40 | Special maps on metric spaces |
51N10 | Affine analytic geometry |
51M10 | Hyperbolic and elliptic geometries (general) and generalizations |