figure-of-eight curve

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• Figure 8 — might refer to: *Figure 8, an expression describing a Lissajous curve that resembles the number 8 *Figure 8, a circle that turns around upon itself, on its side is a symbol for infinity *Figure eight knot, (also called a Flemish Knot), is a type… …   Wikipedia

• National Ice Skating Association — NISA Sport Ice skating Formation date 1879 Affiliation International Skating Union Headquarters National Ice Centre, Notting …   Wikipedia

• Analemma — was also a book by Ptolemy .In astronomy, an analemma (IPA: IPA|/ˌænəˈlɛmə/, Latin for the pedestal of a sundial) is a curve representing the angular offset of a celestial body (usually the Sun) from its mean position on the celestial sphere as… …   Wikipedia

• Powertrack — (UK) and Speedtrack (US) are brandnames for Matchbox s foray into toy slot cars. Introduced in the late 1970s Powertrack/Speedtrack featured cars that could be seen in the dark as the cars had headlights. Matchbox s H0/00 (approx. 1/64th) cars… …   Wikipedia

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• Lemniscate of Gerono — In algebraic geometry, the lemniscate of Gerono, or figure eight curve , is a plane algebraic curve of degree four and genus zero shaped like an infty symbol, or figure eight. It has equation:x^4 x^2+y^2 = 0.It was studied by Camille Christophe… …   Wikipedia

• connectedness — See connectedly. * * * ▪ mathematics       in mathematics, fundamental topological property of sets that corresponds with the usual intuitive idea of having no breaks. It is of fundamental importance because it is one of the few properties of… …   Universalium

• homeomorphism — homeomorphic, homeomorphous, adj. /hoh mee euh mawr fiz euhm/, n. 1. similarity in crystalline form but not necessarily in chemical composition. 2. Math. a function between two topological spaces that is continuous, one to one, and onto, and the… …   Universalium

• Mandelbrot , Benoit — (1924–) Polish born American mathematician The son of a Lithuanian Jewish merchant, Mandelbrot was born in the Polish capital Warsaw but moved with his parents to Paris in 1936. In 1939 they found it necessary to flee once more and lived in Tulle …   Scientists

• Sof Omar Caves — At 15.1 km (9.5 miles) long, Sof Omar Cave is the longest cave in Ethiopia; sources claim it is the longest system of caves in Africa [ [http://www.oromiagov.org/Nattraction.asp Natural Attractions Oromia State government website] ] and ranks as… …   Wikipedia

• Camille-Christophe Gerono — (1799 in Paris, France – 1891 in Paris) was a French mathematician and co editor of Nouvelles annales de mathématiques . He concerned himself above all with geometry. The Lemniscate of Gerono or figure eight curve was named after him …   Wikipedia