RT Journal Article T1 On some characterizations of inner product spaces A1 Mendoza Casas, José A1 Pakhrou, Tijani AB We study some characterizations of inner product spaces given in the literature. Among other things, we give an example showing that one of the characterizations given in the classical book of Amir (1986) is not correct. PB Elsevier SN 0022-247X YR 2003 FD 2003-06-01 LK https://hdl.handle.net/20.500.14352/50162 UL https://hdl.handle.net/20.500.14352/50162 LA eng NO D.G.I.C.Y.T. DS Docta Complutense RD 5 abr 2025