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Table 4 Absolute errors \(\pmb{|f(z)-f_{n}(z)|}\) at some selected points on Ω for Example 2

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

n

−0.6 − 0.2i

0.75

0.8 + 0.4i

0.7 + 0.2i

32

\(7.0~(-4) \)

\(4.0~(-4) \)

\(1.0~(-3) \)

\(1.2~(-3) \)

64

\(1.47~(-5) \)

\(2.03~(-5) \)

\(8.64~(-5) \)

\(1.08~(-4) \)

128

\(6.51~(-7) \)

\(1.87~(-6) \)

\(6.51~(-6) \)

\(7.95~(-6) \)

256

\(2.48~(-7) \)

\(6.02~(-7) \)

\(4.56~(-7) \)

\(5.87~(-7) \)

512

\(7.30~(-8) \)

\(1.22~(-7) \)

\(4.07~(-8) \)

\(7.27~(-8) \)

1,024

\(1.29~(-8) \)

\(1.96~(-8) \)

\(5.40~(-9) \)

\(1.11~(-8)\)