differential equation with a small parameter

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• Matrix differential equation — A differential equation is a mathematical equation for an unknown function of one or several variables that relates the values of the function itself and of its derivatives of various orders. A matrix differential equation is one containing more… …   Wikipedia

• Differential geometry of surfaces — Carl Friedrich Gauss in 1828 In mathematics, the differential geometry of surfaces deals with smooth surfaces with various additional structures, most often, a Riemannian metric. Surfaces have been extensively studied from various perspectives:… …   Wikipedia

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• Debye–Hückel equation — The Debye–Hückel equation and Debye–Hückel limiting law, were derived by Peter Debye and Erich Hückel, who developed a theory with which to calculate activity coefficients of electrolyte solutions.[1] Activities, rather than concentrations, are… …   Wikipedia

• Landau–Lifshitz–Gilbert equation — In physics, the Landau Lifshitz Gilbert equation , named for Lev Landau and Evgeny Lifshitz and T. L. Gilbert, is a name used for a differential equation describing the precessional motion of magnetization M in a solid. It is a modification by… …   Wikipedia

• Camassa–Holm equation — In fluid dynamics, the Camassa–Holm equation is the integrable, dimensionless and non linear partial differential equation:u t + 2kappa u x u {xxt} + 3 u u x = 2 u x u {xx} + u u {xxx}. ,The equation was introduced by Camassa and HolmCamassa Holm …   Wikipedia

• Continuous-repayment mortgage — Analogous to continuous compounding, a continuous annuity[1][2] is an ordinary annuity in which the payment interval is narrowed indefinitely. A (theoretical) continuous repayment mortgage is a mortgage loan paid by means of a continuous annuity …   Wikipedia

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• 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

• Cnoidal wave — US Army bombers flying over near periodic swell in shallow water, close to the Panama coast (1933). The sharp crests and very flat troughs are characteristic for cnoidal waves. In fluid dynamics, a cnoidal wave is a nonlinear and exact periodic… …   Wikipedia