RT journal article T1 The index of strong rotundity A1 García Pacheco, Francisco Javier A2 Matemáticas K1 exposed point K1 rotund point K1 smooth point K1 Banach space K1 Hilbert space AB The index of strong rotundity is introduced. This index is used to determine how far anelement of the unit sphere of a real Banach space is from being a strongly exposed point of the unitball. This index is computed for Hilbert spaces. Characterizations of the set of rotund points and theset of smooth points are provided for a better understanding of the construction of the index of strongrotundity. Finally, applications to the stereographic projection are provided PB AMER INST MATHEMATICAL SCIENCES-AIMS SN 2473-6988 YR 2023 FD 2023 LK http://hdl.handle.net/10498/31483 UL http://hdl.handle.net/10498/31483 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 12-nov-2026