Harold Scott MacDonald "Donald" Coxeter (February 9, 1907 - March 31, 2003) is generally regarded as the greatest geometer of the 20th century. He was born in London but spent most of his life in Canada.

He worked for 60 years at the University of Toronto and published twelve books. He was most noted for his work on regular polytopes and higher-dimensional geometries. He met Maurits Escher and his work on geometric figures helped inspire some of Escher's works. He also inspired some of the innovations of Buckminster Fuller.

He studied the philosophy of mathematics under Ludwig Wittgenstein at Trinity College, Cambridge. He remained at Cambridge following his doctorate, then did postgraduate studies at Princeton University. In 1936 he moved to the University of Toronto, becoming a professor in 1948. He was elected a Fellow of the Royal Society in 1950.

In 1997 he was made a Companion of the Order of Canada.

Works

• The Real Projective Plane (1955)
• Introduction to Geometry (1961)
• Regular Polytopes (1963)
• Regular Complex Polytopes
• Non-Euclidean Geometry (1965)
• Geometry Revisited (with S. L. Greitzer, 1967)
• Projective Geometry (2d ed, 1974)
• The Beauty of Geometry: Twelve Essays
• The Fifty-Nine Icosahedra (with P. Du Val , H. T. Flather , J. F. Petrie )
• Mathematical Recreations and Essays (with W. W. Rouse Ball)

External link

• Harold Scott McDonald Coxeter