%0 Journal Article %A Mendoza Casas, José %A Pakhrou, Tijani %T On some characterizations of inner product spaces %D 2003 %@ 0022-247X %U https://hdl.handle.net/20.500.14352/50162 %X 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. %~