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- W2145948049 abstract "Time-harmonic acoustic wave propagation in an inhomogeneous ocean with depth-dependent sound speed can be modeled by the Helmholtz equation in an infinite, three-dimensional (3D) waveguide of finite height. Using variational theory in Sobolev spaces we prove well posedness of the corresponding scattering problem from a bounded inhomogeneity inside such an ocean. To this end, we introduce an exterior Dirichlet-to-Neumann operator for depth-dependent sound speed and prove boundedness, coercivity, and holomorphic dependence of this operator in function spaces adapted to our weak solution theory. Analytic Fredholm theory then yields existence and uniqueness of solution for the scattering problem for all but a countable sequence of frequencies. The latter result generalizes corresponding theory for waveguide scattering with constant sound speed and easily extends to various related scattering problems, e.g. to scattering from impenetrable obstacles." @default.
- W2145948049 created "2016-06-24" @default.
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- W2145948049 date "2015-05-21" @default.
- W2145948049 modified "2023-09-24" @default.
- W2145948049 title "Time-harmonic acoustic wave scattering in an ocean with depth-dependent sound speed" @default.
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- W2145948049 doi "https://doi.org/10.1080/00036811.2015.1047831" @default.
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