negative half-plane
71Hour angle — In astronomy, the hour angle is one of the coordinates used in the equatorial coordinate system for describing the position of a point on the celestial sphere.The hour angle of a point is the angle between the half plane determined by the Earth… …
72Polar decomposition — In mathematics, particularly in linear algebra and functional analysis, the polar decomposition of a matrix or linear operator is a factorization analogous to the polar form of a nonzero complex number z where r is the absolute value of z (a… …
73Hardy–Littlewood circle method — In mathematics, the Hardy–Littlewood circle method is one of the most frequently used techniques of analytic number theory. It is named for G. H. Hardy and J. E. Littlewood, who developed it in a series of papers on Waring s problem. Contents 1… …
74Acererak — In universe subject = a described object = a stock character created for a role playing game category = Nofootnotes|date=February 2008 Greyhawk Character caption= name=Acererak home=Vast Swamp gender=Male race=Half fiend human class=Wizard… …
75Tiamat (Dungeons & Dragons) — Tiamat Tiamat in the background with her human form in the foreground Game background Title(s) The Chromatic Dragon[1], Creator of Evil Dragonkind …
76Hurwitz polynomial — In mathematics, a Hurwitz polynomial, named after Adolf Hurwitz, is a polynomial whose coefficients are positive real numbers and whose zeros are located in the left half plane of the complex plane, that is, the real part of every zero is… …
77Shattered kingdoms — is the name of a Multi User Dungeon (MUD) text based RPG. The game opened on January 1st, 1996 and has been evolving ever since. Shattered Kingdoms is a sword and sorcery fantasy roleplaying game, played online by many people at the same time who …
78Zeta function regularization — In mathematics and theoretical physics, zeta function regularization is a type of regularization or summability method that assigns finite values to superficially divergent sums. The technique is now commonly applied to problems in physics, but… …
79Fourier transform — Fourier transforms Continuous Fourier transform Fourier series Discrete Fourier transform Discrete time Fourier transform Related transforms The Fourier transform is a mathematical operation that decomposes a function into its constituent… …
80Enriques-Kodaira classification — In mathematics, the Enriques Kodaira classification is a classification of compact complex surfaces. For complex projective surfaces it was done by Federigo Enriques, and Kunihiko Kodaira later extended it to non algebraic compact surfaces. It… …
