Fast high-order solvers for the Lippmann--Schwinger equation in piecewise-smooth heterogeneous media
This article presents a fast, high-order Nystr\"om solver for the two-dimensional Lippmann--Schwinger equation arising from time-harmonic scattering by penetrable, piecewise-smooth heterogeneous media. Relying on high-order evaluation of the Newtonian potential on unstructured grids adapted to interfaces of discontinui...