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Published in:
2019 | OriginalPaper | Chapter
2. The Helmholtz Equation
Authors : David Colton, Rainer Kress
Published in: Inverse Acoustic and Electromagnetic Scattering Theory
Publisher: Springer International Publishing
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Abstract
Studying an inverse problem always requires a solid knowledge of the theory for the corresponding direct problem. Therefore, the following two chapters of our book are devoted to presenting the foundations of obstacle scattering problems for time-harmonic acoustic waves, i.e., to exterior boundary value problems for the scalar Helmholtz equation. Our aim is to develop the analysis for the direct problems to an extent which is needed in the subsequent chapters on inverse problems.