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Descartes on Polyhedra: A Study of the "De solidorum elementis" is a book in the history of mathematics, concerning the work of René Descartes on polyhedra.Central to the book is the disputed priority for Euler's polyhedral formula between Leonhard Euler, who published an explicit version of the formula, and Descartes, whose De solidorum elementis includes a result from which the formula is ...
Skellefteå Kraft Arena is an indoor sporting arena located in Skellefteå, Sweden. The capacity of the arena is 5,801 and it was built in 1966. and inaugurated on 6 January 1967. It is the home arena of the SHL's Skellefteå AIK as well as Hockeyettan's SK Lejon. The arena is named after Skellefteå Kraft, a Swedish power company.
He died on July 15, 1962, and was buried in the Mausoleum of Knollwood Cemetery. [4] He married Nancy Lovis in December 1909 and had three children, Nanette, Margaret, and Edwin Arthur, Jr. The year after his wife's death in 1925 Kraft married his second wife, mezzo-soprano Marie Simmelink. [5] He was a fellow of the American Guild of Organists ...
Jeux Descartes was a French publisher of roleplaying games and board games. Their most popular lines included: Eurogames, a set of serious board games, previously published by Duccio Vitale 's independent company; Blue Games, small card games for larger groups; and Games for Two . Jeux Descartes was founded in 1977 and went out of business in 2005.
It is a snark, first discovered by William Tutte in 1948 under the pseudonym Blanche Descartes. A Descartes snark is obtained from the Petersen graph by replacing each vertex with a nonagon and each edge with a particular graph closely related to the Petersen graph. Because there are multiple ways to perform this procedure, there are multiple ...
Descartes' rule of signs. In mathematics, Descartes' rule of signs, first described by René Descartes in his work La Géométrie, is a technique for getting information on the number of positive real roots of a polynomial. It asserts that the number of positive roots is at most the number of sign changes in the sequence of polynomial's ...
Descartes was the lead ship of the Descartes class of protected cruisers built for the French Navy in the 1890s. The Descartes -class cruisers were ordered as part of a construction program directed at strengthening the fleet's cruiser force. At the time, France was concerned with the growing naval threat of the Italian and German fleets, and ...
Erika Kraft (18 November 1931 – 4 March 2003) was a German former figure skater who represented West Germany. She was the 1952 national champion and placed tenth at the 1952 Winter Olympics in Oslo, Norway. She finished 14th at the 1951 World Championships in Milan, Italy, and fourth at the 1952 European Championships in Vienna, Austria.