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Table 1 Truncation method: Relative error E r (f)

From: Two regularization methods for a class of inverse boundary value problems of elliptic type

N

M

ϵ

E r (f)

20

4

0.01

0.0361

40

4

0.01

0.0155

20

4

0.001

0.0022

40

4

0.001

0.0019