Figure 9: (a) The identities (14) and (31) hold to high accuracy in our implementation, irrespective of the degree of mesh refinement. (b) The solution to (25) on (1) with parameters as specified in Section 4. The solution with RCIP (17) and (28), shown as blue stars, agrees with the solution from (8), shown as a red solid line. The solution diverges in the corner.