Singular perturbation of reduced wave equation and scattering from an embedded obstacle

Hongyu Liu, Zaijiu Shang, Hongpeng Sun +1

We consider time-harmonic wave scattering from an inhomogeneous isotropic medium supported in a bounded domain $\Omega \subset {\mathbb{R}}^N$ ($N\ge 2$). {In a subregion $D⋐\Omega$, the…