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Table 8 The absolute errors \(\pmb{|f(z)-f_{n}(z)|}\) at some selected points on Ω for Example 4

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

n

0.2 − 0.4i

0.3 − 0.2i

0.6 + 0.2i

1 + 0.5i

32

\(7.0~(-4) \)

\(1.6~(-3) \)

\(1.3~(-3) \)

\(1.1~(-3) \)

64

\(3.87~(-5) \)

\(1.02~(-4) \)

\(8.92~(-5) \)

\(37.07~(-5) \)

128

\(2.04~(-6) \)

\(6.23~(-6) \)

\(5.86~(-6) \)

\(4.58~(-6) \)

256

\(9.83~(-8) \)

\(3.66~(-7) \)

\(3.76~(-7) \)

\(2.97~(-7) \)

512

\(4.34~(-9) \)

\(2.12~(-8) \)

\(2.39~(-8) \)

\(1.92~(-8) \)

1,024

\(1.87~(-10) \)

\(1.22~(-9) \)

\(1.51~(-9) \)

\(1.24~(-9) \)