Geodesic
Local Approximation Properties of Sets and Continuous Selections on Them
Matematičeskie zametki, Tome 106 (2019) no. 6, pp. 924-939.

Voir la notice de l'article provenant de la source Math-Net.Ru

Sets with a continuous selection from the near-best approximation operator are studied and the relationship of such sets with the radial $\delta$-solarity property and with the metric function is discussed.
Keywords: continuous selection, sun, fixed points. 
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I. G. Tsar'kov. Local Approximation Properties of Sets and Continuous Selections on Them. Matematičeskie zametki, Tome 106 (2019) no. 6, pp. 924-939. http://geodesic.mathdoc.fr/item/MZM_2019_106_6_a12/

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