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Translated fromSibirskii Matematicheskii Zhurnal, Vol. 36, No. 5, pp. 1113–1118, September–October, 1995.
In conclusion, the author expresses his gratitude to V. A. Toponogov for fruitful discusstions.
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Kuz'minykh, A.V. On mappings “loosening” convexity. Sib Math J 36, 958–962 (1995). https://doi.org/10.1007/BF02112536
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DOI: https://doi.org/10.1007/BF02112536