Characterization of Real Inner Product Spaces by Means of Symmetrical Bilinear Forms

Angles in Normed Linear Spaces and a Cha

Angles in Normed Linear Spaces and a Characterization of Real Inner Product Spaces

✍ Charles R. Diminnie; Edward Z. Andalafte; Raymond W. Freese 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 412 KB 👁 1 views

A number of writers have defined a concept of angle in a normed linear space or metric space by means of the law of cosines, and have studied the properties of these angles obtaining, in some cases, characterizations of real inner product spaces. (For a summary of earlier results see MARTIN and VAL