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The asymptotic behaviour of the Fourier coefficients in the scattering problem by the contours \(r=(1+\beta\;\cos \varphi)\gamma\). (Russian) Zbl 0333.35059


MSC:

35P25 Scattering theory for PDEs
35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation
35B40 Asymptotic behavior of solutions to PDEs
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