Harold Scott MacDonald "Donald" Coxeter, CC , Ph.D. , D.Math. , FRS (February 9, 1907 - March 31, 2003) is regarded as one of the great geometers of the 20th century. He was born in London but spent most of his life in Canada. The Order of Canada is Canadas highest civilian honour, awarded to those who adhere to the Orders motto Desiderantes meliorem patriam meaning desiring a better country. ... Doctor of Philosophy (Ph. ... The Royal Society of London is claimed to be the oldest learned society still in existence and was founded in 1660. ... February 9 is the 40th day of the year in the Gregorian Calendar. ... 1907 was a common year starting on Tuesday (see link for calendar). ... March 31 is the 90th day of the year in the Gregorian Calendar (91st in Leap years), with 275 days remaining, as the final day of March. ... 2003 is a common year starting on Wednesday of the Gregorian calendar. ... A geometer is a mathematician whose area of study is geometry. ... (19th century - 20th century - 21st century - more centuries) Decades: 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s As a means of recording the passage of time, the 20th century was that century which lasted from 1901–2000 in the sense of the Gregorian calendar (1900–1999 in the... St Stevens Tower - The Clock Tower of the Palace of Westminster which contains Big Ben London (see also different names) is the capital city of the United Kingdom and of England. ...

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. Founded in 1827, the University of Toronto (U of T), in Toronto, Ontario, is the largest university in Canada and one of the most important scholarly publishers in North America. ... In geometry polytope means, first, the generalization to any dimension of polygon in two dimensions, and polyhedron in three dimensions. ... Self-portrait (1943) by M.C. Escher Maurits Cornelis Escher (Leeuwarden, June 17, 1898 – March 27, 1972 in Laren) was a Dutch artist most known for his woodcuts, lithographs and mezzotints, which tend to feature impossible constructions, explorations of infinity, and tessellations. ... In the US postage stamp commemorating Buckminster Fuller and his contributions to architecture and science, some of his inventions are visible. ...

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. Philosophy of mathematics is that branch of philosophy which attempts to answer questions such as: why is mathematics useful in describing nature?, in which sense(s), if any, do mathematical entities such as numbers exist? and why and how are mathematical statements true?. Various approaches to answering these questions will... Ludwig Wittgenstein (1889-1951), pictured here in 1930, made influential contributions to logic and the philosophy of language, critically examining the task of conventional philosophy and its relation to the nature of language. ... Full name The College of the Holy and Undivided Trinity Motto Virtus vera nobilitas Virtue is true Nobility Named after The Holy Trinity Previous names Kings Hall and Michaelhouse (until merged) Established 1546 Sister College Christ Church Master Sir Martin Rees Location Trinity Street Undergraduates 656 Graduates 380 Homepage... For other Princetons, see Princeton. ... 1936 was a leap year starting on Wednesday (link will take you to calendar). ... 1948 is a leap year starting on Thursday (link will take you to calendar). ... The Royal Society of London for the Improvement of Natural Knowledge, known simply as the Royal Society, is claimed to be the oldest learned society still in existence. ... 1950 was a common year starting on Sunday (link will take you to calendar). ...

In 1997 he was made a Companion of the Order of Canada. 1997 is a common year starting on Wednesday of the Gregorian calendar. ... The Order of Canada is Canadas highest civilian honour, awarded to those who adhere to the Orders motto Desiderantes meliorem patriam meaning desiring a better country. ...

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)

S. L. Greitzer is a mathematician wo wrote the text book Geometry Revisited together with H. S. M. Coxeter in 1967. ... Walter William Rouse Ball (1850 August 14–1925 April 4) was a Brtish mathematician, and a fellow at Trinity College, Cambridge from 1878 to 1905. ...

External link

• Harold Scott McDonald Coxeter