Fig. 1
From: Fast rapidly convergent penetrable scattering computations
Illustrations of the curvilinear patches and the corresponding POU functions for a three patch cover for a bean shaped scatterer. a Shows the scatterer shape. b Illustrates the POU function for the interior patch whereas (c) and (d) illustrates two boundary patches. e, f Illustrate the collection of both the boundary patches and all of the patches, respectively