Abstract
By extending Kato's theory of two Hilbert space scattering, we are able to formulate both optical and accoustical scattering from inhomogeneous media as strictly elliptic problems. We use this formulation to present simple proofs of the existence and completeness of scattering states.
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Reed, M., Simon, B. The scattering of classical waves from inhomogeneous media. Math Z 155, 163–180 (1977). https://doi.org/10.1007/BF01214216
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DOI: https://doi.org/10.1007/BF01214216