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An a priori estimate for the principal radii of curvature of a closed convex hypersurface in terms of their mean values. (English. Russian original) Zbl 0193.21702

Sov. Math., Dokl. 10, 626-628 (1969); translation from Dokl. Akad. Nauk SSSR 186, 516-518 (1969).

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