Geodesic
A Class of Quasi-Nonexpansive Multi-Valued Maps
Canadian mathematical bulletin, Tome 18 (1975) no. 5, pp. 709-714

Voir la notice de l'article provenant de la source Cambridge University Press

Let (X, d) be a (nonempty) metric space. bc(X) will denote the family of all nonempty bounded closed subsets of X endowed with the Hausdorff metric D induced by d [2, pp. 205]. Let/be a map of X into bc(X). f is nonexpansive at a point x in X if for all y in X. 
Shiau, Chyi; Tan, Kok-Keong. A Class of Quasi-Nonexpansive Multi-Valued Maps. Canadian mathematical bulletin, Tome 18 (1975) no. 5, pp. 709-714. doi: 10.4153/CMB-1975-124-2
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