Ludo Philippaerts Ludo Philippaerts Ludo Philippaerts (born 22 June 1963) is a Belgian show jumping rider. He is a native of Genk, Limburg, Belgium. Philippaerts is a four-time Olympian. As an individual, he ranked 4th at both the 2000 Olympic Games and the 2004 Olympic Games. In Athens, the Belgian team, of which he was a part, ranked 6th. At the 1992 Summer Olympics in Barcelona, Philippaerts and his late champion horse, Darco, ranked 7th. Philippaerts won the 2008 FEI World Cup final in Mechelen, 26–30 December 2008. At the 2006 FEI World Equestrian Games in Aachen, he had an individual rank
What Is Mathematics? What Is Mathematics? What Is Mathematics? is a mathematics book written by Richard Courant and Herbert Robbins, published in England by Oxford University Press. It is an introduction to mathematics, intended both for the mathematics student and for the general public. First published in 1941, it discusses number theory, geometry, topology and calculus. A second edition was published in 1996 with an additional chapter on recent progress in mathematics, written by Ian Stewart. The book was based on Courant's course material. Although Robbins assisted in writing a large part of the book, he had to fight for authorship. Nevertheless, Courant