Direct and inverse time-harmonic elastic scattering from point-like and extended obstacles

  title={Direct and inverse time-harmonic elastic scattering from point-like and extended obstacles},
  author={Guanghui Hu and Andrea Mantile and Mourad Sini and Tao Yin},
  journal={Inverse Problems \& Imaging},
This paper concerns the time-harmonic direct and inverse elastic scattering by an extended rigid elastic body surrounded by a finite number of point-like obstacles. We first justify the point-interaction model for the Lame operator within the singular perturbation approach. For a general family of pointwise-supported singular perturbations, including anisotropic and non-local interactions, we derive an explicit representation of the scattered field. In the case of isotropic and local point… 
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