Walter Benz

Walter Benz (May 2, 1931 – January 13, 2017) was a German mathematician, an expert in geometry. Benz was born in Mainz, Germany. He studied at the Johannes Gutenberg University of Mainz.
After a position at the Johann Wolfgang Goethe University Frankfurt am Main, he served as a professor at the Universities of Bochum, Waterloo and Hamburg where he was professor emeritus. Benz was honoured with the degree of a Dr. h.c.
Inner product spaces over the real numbers were the basis of a 2007 book by Benz: "Classical Geometries in Modern Contexts".