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An anisotropic perfectly matched layer method for Helmholtz scattering problems with discontinuous wave number

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  • The anisotropic perfectly matched layer (PML) defines a continuous vector field outside a rectangle domain and performs the complex coordinate stretching along the direction of the vector field. In this paper we propose a new way of constructing the vector field which allows us to prove the exponential decay of the stretched Green function without the constraint on the thickness of the PML layer. We report numerical experiments to illustrate the competitive behavior of the proposed PML method.
    Mathematics Subject Classification: Primary: 65N30; Secondary: 78A45, 35Q60.

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