%0 Journal Article %A García Pacheco, Francisco Javier %T The index of strong rotundity %D 2023 %@ 2473-6988 %U http://hdl.handle.net/10498/31483 %X The index of strong rotundity is introduced. This index is used to determine how far an element of the unit sphere of a real Banach space is from being a strongly exposed point of the unit ball. This index is computed for Hilbert spaces. Characterizations of the set of rotund points and the set of smooth points are provided for a better understanding of the construction of the index of strong rotundity. Finally, applications to the stereographic projection are provided %K exposed point %K rotund point %K smooth point %K Banach space %K Hilbert space %~ Universidad de Cádiz