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Table 2 Absolute errors \(\pmb{|f(z)-f_{n}(z)|}\) at some selected points on Ω for Example 1

From: Solving Robin problems in multiply connected regions via an integral equation with the generalized Neumann kernel

n

−1.25 + 0.2i

−0.5 + 0.4i

0.5 + 0.4i

1.3 − 0.1i

32

\(2.10~(-3) \)

\(8.0~(-4) \)

\(8.0~(-4) \)

\(1.30~(-3) \)

64

\(2.98~(-5) \)

\(6.11~(-5) \)

\(6.04~(-5) \)

\(3.31~(-5) \)

128

\(1.80~(-6) \)

\(7.68~(-6) \)

\(6.80~(-6) \)

\(1.61~(-6) \)

256

\(1.99~(-7) \)

\(5.79~(-7) \)

\(5.10~(-7) \)

\(8.08~(-8) \)

512

\(1.57~(-8) \)

\(5.13~(-8) \)

\(3.53~(-8) \)

\(4.48~(-9) \)

1,024

\(1.15~(-9) \)

\(3.32~(-9) \)

\(2.39~(-9) \)

\(3.08~(-10) \)