plane approximation

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• Beta plane — In geophysical fluid dynamics, an approximation whereby the Coriolis parameter, f , is set to vary linearly in space is called a beta plane approximation. On a rotating sphere such as the earth, f varies with the sine of latitude; a linear… …   Wikipedia

• Muffin-tin approximation — Electronic structure methods Tight binding Nearly free electron model Hartree–Fock method Modern valence bond Generalized valence bond Møller–Plesset perturbation theory …   Wikipedia

• Boussinesq approximation (water waves) — In fluid dynamics, the Boussinesq approximation for water waves is an approximation valid for weakly non linear and fairly long waves. The approximation is named after Joseph Boussinesq, who first derived them in response to the observation by… …   Wikipedia

• Lanczos approximation — In mathematics, the Lanczos approximation is a method for computing the Gamma function numerically, published by Cornelius Lanczos in 1964. It is a practical alternative to the more popular Stirling s approximation for calculating the Gamma… …   Wikipedia

• Bit plane — A bit plane of a digital discrete signal (such as image or sound) is a set of bits having the same position in the respective binary numbers [cite web last = first = authorlink = coauthors = title =Bit Plane work = publisher =PC Magazine date =… …   Wikipedia

• Born approximation — Not to be confused with the Born–Oppenheimer approximation. In scattering theory and, in particular in quantum mechanics, the Born approximation consists of taking the incident field in place of the total field as the driving field at each point… …   Wikipedia

• Slowly varying envelope approximation — In physics, the slowly varying envelope approximation (SVEA) is the assumption that the envelope of a forward travelling wave pulse varies slowly in time and space compared to a period or wavelength. This requires the spectrum of the signal to be …   Wikipedia

• Paraxial approximation — In geometric optics, the paraxial approximation is an approximation used in ray tracing of light through an optical system (such as a lens).cite book | first=John E. | last=Greivenkamp | year=2004 | title=Field Guide to Geometrical Optics |… …   Wikipedia

• Linear approximation — In mathematics, a linear approximation is an approximation of a general function using a linear function (more precisely, an affine function). DefinitionGiven a differentiable function f of one real variable, Taylor s theorem for n =1 states that …   Wikipedia

• Onde plane progressive sinusoïdale — Onde plane Une façon possible de représenter une onde plane. Les plans correspondent aux fronts d ondes qui doivent être imaginés infinis. L onde plane est un concept issu de la physique de la propagation des ondes. C est une onde dont les fronts …   Wikipédia en Français

• Fake projective plane — For Freedman s example of a non smoothable manifold with the same homotopy type as the complex projective plane, see 4 manifold. In mathematics, a fake projective plane (or Mumford surface) is one of the 50 complex algebraic surfaces that have… …   Wikipedia