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Two-scale decompositions of quasi-normal waves in irregular refractive wave guides and an estimation of their applicability for high frequencies. (Russian) Zbl 0478.35031

MSC:
35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation
35C99 Representations of solutions to partial differential equations
78A40 Waves and radiation in optics and electromagnetic theory
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