Poisson constant

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• Poisson's ratio — n. [see POISSON DISTRIBUTION] Physics an elastic constant of a material equal to the ratio of contraction sideways to expansion lengthwise when the material is stretched …   English World dictionary

• Constant of motion — In mechanics, a constant of motion is a quantity that is conserved throughout the motion, imposing in effect a constraint on the motion. However, it is a mathematical constraint, the natural consequence of the equations of motion, rather than a… …   Wikipedia

• Poisson bracket — In mathematics and classical mechanics, the Poisson bracket is an important operator in Hamiltonian mechanics, playing a central role in the definition of the time evolution of a dynamical system in the Hamiltonian formulation. In a more general… …   Wikipedia

• Poisson process — A Poisson process, named after the French mathematician Siméon Denis Poisson (1781 ndash; 1840), is the stochastic process in which events occur continuously and independently of one another (the word event used here is not an instance of the… …   Wikipedia

• Poisson manifold — In mathematics, a Poisson manifold is a differentiable manifold M such that the algebra of smooth functions over M is equipped with a bilinear map called the Poisson bracket, turning it into a Poisson algebra. Since their introduction by André… …   Wikipedia

• Poisson summation formula — The Poisson summation formula is an equation relating the coefficients of the Fourier Series of the periodic extension of a function in terms of the values of the function s continuous Fourier transform. The Poisson Summation Formula was… …   Wikipedia

• Poisson distribution — /pwah sohn /; Fr. /pwann sawonn /, Statistics. a limiting form of the binomial probability distribution for small values of the probability of success and for large numbers of trials: particularly useful in industrial quality control work and in… …   Universalium

• Poisson-Boltzmann equation — The Poisson Boltzmann equation is a differential equation that describes electrostatic interactions between molecules in ionic solutions. It is the mathematical base for the Gouy Chapman double layer (interfacial) theory; first proposed by Gouy… …   Wikipedia

• Poisson , Siméon-Denis — (1781–1840) French mathematician and mathematical physicist Poisson, born the son of a local government administrator at Pithiviers in France, studied at the Ecole Polytechnique, where his teachers included Pierre Simon Laplace and Joseph… …   Scientists

• Poisson's ratio — /ˌpwʌsɒnz ˈreɪʃioʊ/ (say .pwusonz raysheeoh) noun an elastic constant of a material, defined as the ratio of lateral strain to the longitudinal strain construed as a positive value …  

• Einstein's constant — or Einstein s gravitational constant, noted kappa; (kappa), is the coupling constant appearing in the Einstein field equation which can be written: G^{alpha gamma} = kappa , T^{alpha gamma} where Gα gamma; is the Einstein tensor and Tα gamma; is… …   Wikipedia