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09:27, 9 August 2021 Comech talk contribs created page Limiting amplitude principle (←Created page with '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.<ref name="tikhonov1948radi...')
10:42, 5 February 2020 Comech talk contribs created page Pokhozhaev's identity (←Created page with ''''Pokhozhaev's identity''' is an integral relation satisfied by stationary localized solutions to a nonlinear wave equation or nonlinear Klein...')
03:48, 7 October 2019 Comech talk contribs created page Discrete spectrum (Mathematics) (←Created page with 'In mathematics, specifically in spectral theory, a '''discrete spectrum''' of a closed linear operator is defi...')
07:53, 23 September 2019 Comech talk contribs created page Riesz projector (←Created page with 'In mathematics, in spectral theory, the '''Riesz projector''' is the projector onto the eigenspace corresponding to a particular eigenvalue (or, more gen...')
21:33, 20 September 2019 Comech talk contribs created page Normal eigenvalues (←Created page with 'In Spectral theory, an eigenvalue <math>\lambda</math> of a closed linear operator <math>A:\,\mathbf{X}\to...')
01:23, 28 June 2019 Comech talk contribs created page Talk:Limiting absorption principle (←Created page with '"In applied mathematics"... Michael, there is nothing particularly "applied" about Spectral Theory/Operator Theory/Functional Analysis -- let us keep this as "In...')
12:45, 26 June 2019 Comech talk contribs created page Limiting absorption principle (←Created page with 'The limiting absorption principle (commonly abbreviated as "LAP") is the concept from the scattering theory of choosing the "correct" resolvent formalism|r...')
03:10, 16 February 2006 User account Comech talk contribs was created