limiting, amplitude, principle, mathematics, limiting, amplitude, principle, concept, from, operator, theory, scattering, theory, used, choosing, particular, solution, helmholtz, equation, choice, made, considering, particular, time, dependent, problem, forced. In mathematics the limiting amplitude principle is a concept from operator theory and scattering theory used for choosing a particular solution to the Helmholtz equation The choice is made by considering a particular time dependent problem of the forced oscillations due to the action of a periodic force The principle was introduced by Andrey Nikolayevich Tikhonov and Alexander Andreevich Samarskii 1 It is closely related to the limiting absorption principle 1905 and the Sommerfeld radiation condition 1912 The terminology both the limiting absorption principle and the limiting amplitude principle was introduced by Aleksei Sveshnikov 2 Formulation editTo find which solution to the Helmholz equation with nonzero right hand side Dv x k2v x F x x R3 displaystyle Delta v x k 2 v x F x quad x in mathbb R 3 nbsp with some fixed k gt 0 displaystyle k gt 0 nbsp corresponds to the outgoing waves one considers the wave equation with the source term D t2 u x t F x e ikt t 0 x R3 displaystyle Delta partial t 2 u x t F x e ikt quad t geq 0 quad x in mathbb R 3 nbsp with zero initial data u x 0 0 tu x 0 0 displaystyle u x 0 0 partial t u x 0 0 nbsp A particular solution to the Helmholtz equation corresponding to outgoing waves is obtained as the limit v x limt u x t eikt displaystyle v x lim t to infty u x t e ikt nbsp for large times 1 3 See also editLimiting absorption principle Sommerfeld radiation conditionReferences edit a b Tikhonov A N and Samarskii A A 1948 On the radiation principle PDF Zh Eksper Teoret Fiz 18 2 243 248 a href Template Cite journal html title Template Cite journal cite journal a CS1 maint multiple names authors list link Sveshnikov A G 1950 Radiation principle Doklady Akademii Nauk SSSR Novaya Seriya 5 917 920 Zbl 0040 41903 Smirnov V I 1974 Course in Higher Mathematics Vol 4 6 ed Moscow Nauka nbsp This mathematics related article is a stub You can help Wikipedia by expanding it vte nbsp This scattering related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Limiting amplitude principle amp oldid 1104036176, wikipedia, wiki, book, books, library,