The Extended Exterior Sphere Condition

Journal of Convex Analysis Volume 31 (2024), No. 1, 039--050 We prove that the complement of a closed set S satisfying an extended exterior sphere condition is nothing but the union of closed balls with common radius. This generalizes [11, Theorem 3] where the set S is assumed to be prox-regular, a...

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Hauptverfasser:	Nour, Chadi, Takche, Jean
Format:	Artikel
Sprache:	eng
Schlagworte:	Mathematics - Metric Geometry
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