Geodesic
On the radius of a set in a Hilbert space
Commentationes Mathematicae Universitatis Carolinae, Tome 25 (1984) no. 2, pp. 355-362 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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Classification : 46C05, 47H10, 47H99, 52A40, 58C05 
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Daneš, Josef. On the radius of a set in a Hilbert space. Commentationes Mathematicae Universitatis Carolinae, Tome 25 (1984) no. 2, pp. 355-362. http://geodesic.mathdoc.fr/item/CMUC_1984_25_2_a15/

[1] J. DANEŠ: On densifying and related mappings and their application in nonlinear functional analysis. in "Theory of Nonlinear Operators", Proceedings of Summer School (G. D. R., Neuendorf, 1972), Akademie-Verlag, Berlin (1974), 15-56. | MR

[2] J. DANEŠ: Some remarks on nonlinear functional analysis. Summer School on "Nonlinear Functional Analysis and Mechanics", Stará Lesná, High Tatras, Czechoslovakia, Sept. 23-27 (1974).

[3] H. W. E. JUNG: Über die kleinste Kugel, die eine räumliche Figur einschliesst. J. Reine Angew. Math. 123 (1901), 241-257.

[4] H. STEINLEIN: A private communication (1978).