orbitally stable solution

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Orbital stability — In mathematical physics or theory of partial differential equations, the solitary wave solution of the form is said to be orbitally stable if any solution with the initial data sufficiently close to forever remains in a given small neighborhood… … Wikipedia
Derrick's theorem — is an argument due to a physicist G.H. Derrick which shows that stationary localized solutions to a nonlinear wave equation or nonlinear Klein–Gordon equation in dimensions three and higher are unstable. Contents 1 Original argument 2… … 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

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