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math.AP2020★ 2 cited
The stiff Neumann problem: asymptotic specialty and "kissing" domains
V. Chiadò Piat, L. D'Elia, S. A. Nazarov
We study the stiff spectral Neumann problem for the Laplace operator in a smooth bounded domain which is divided into two subdomains: an annulus and a…
math.AP2014★ 18 cited
Non-scattering wavenumbers and far field invisibility for a finite set of incident/scattering directions
Anne-Sophie Bonnet-Ben Dhia, Lucas Chesnel, Sergei A. Nazarov
We investigate a time harmonic acoustic scattering problem by a penetrable inclusion with compact support embedded in the free space. We consider cases where an observer can produc…