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. Author manuscript; available in PMC: 2013 Jun 4.
Published in final edited form as: SIAM Rev Soc Ind Appl Math. 2011 Nov 7;53(4):683–720. doi: 10.1137/090774288

Fig. 3.3.

Fig. 3.3

Relative errors of image approximations with the source locations. (a) Accuracy performance of Friedman, improved Friedman, Abagyan–Totrov, and Kirkwood image approximations, and multiple image approximations (M = 1 and 2), for the Poisson equation. (b) Accuracy performance of line image approximations to the exact series solution of the PB equation for λ = 1 using different asymptotic formulas, where M = 20 is used in order to discretize the line image with high accuracy to give “exact” values. Asyms. A, B, and C represent formulas (3.33), (3.35), and (3.36), respectively.