Geodesic
On functions preserving almost radiality and their relations to radial and pseudo-radial spaces
Commentationes Mathematicae Universitatis Carolinae, Tome 28 (1987) no. 4, pp. 751-781
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Classification : 54A25, 54C10, 54D55 
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Dimov, Georgi D.; Isler, Romano; Tironi, G. On functions preserving almost radiality and their relations to radial and pseudo-radial spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 28 (1987) no. 4, pp. 751-781. http://geodesic.mathdoc.fr/item/CMUC_1987_28_4_a14/

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