definite metric
81Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun …
82Melvil Dewey — Born Melville Louis Kossuth Dewey December 10, 1851 (1851 12 10) Adams Center, New York …
83Gear — For the gear like device used to drive a roller chain, see Sprocket. This article is about mechanical gears. For other uses, see Gear (disambiguation). Two meshing gears transmitting rotational motion. Note that the smaller gear is rotating… …
84Singular value decomposition — Visualization of the SVD of a 2 dimensional, real shearing matrix M. First, we see the unit disc in blue together with the two canonical unit vectors. We then see the action of M, which distorts the disk to an ellipse. The SVD decomposes M into… …
85Comparison of American football and rugby union — A comparison of American football and rugby union is possible because of the games shared origins, despite their dissimilarities. A rugby union match from the 2011 Rugby World Cup showing the sports distinguishing feature, the ball carrier leads… …
86Philosophical Explanations — is a wide ranging metaphysical, epistemological, and ethical treatise written by Robert Nozick and published in 1981. The Parthenon Model and non coercive philosophy Nozick makes a case for a Parthenon model of philosophical ambition rather than… …
87Clifford bundle — In mathematics, a Clifford bundle is an algebra bundle whose fibers have the structure of a Clifford algebra and whose local trivializations respect the algebra structure. There is a natural Clifford bundle associated to any (pseudo) Riemannian… …
88Davidon-Fletcher-Powell formula — The Davidon Fletcher Powell formula (DFP) finds the solution to the secant equation that is closest to the current estimate and satisfies the curvature condition (see below). It was the first quasi Newton method which generalize the secant method …
89Jazz drumming — is the art of playing percussion (predominantly the drum set) in jazz. The techniques and instrumentation of this type of performance have evolved over several periods, influenced by jazz at large and the individual drummers within it.… …
90Berthollet, Claude-Louis — ▪ French chemist Introduction born Dec. 9, 1748, Talloires, Savoy, France died Nov. 6, 1822, Arcueil central French figure in the emergence of chemistry as a modern discipline in the late 18th century. He combined acute experimental skills… …
