Boundary element methods (BEMs) are an increasingly popular approach to model electromagnetic scattering both by perfect conductors and dielectric objects. Several mathematical, numerical, and computaI. Bogaert, Department of Information Technology, Ghent University, SintPietersnieuwstraat 41, 9000 Gent, Belgium. (ignace.bogaert@intec.ugent.be) K. Cools, Department of Information Technology, Gh...