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Table 4 Error of v in example ( 57 )

From: Numerical solution to Bitsadze-Samarskii type elliptic overdetermined multipoint NBVP

Difference scheme

N  =  M  = 10

N  =  M  = 20

N  =  M  = 40

First order of the ADS

0.01089

0.00408

0.0017133

Second order of the ADS

5.39 × 10−3

1.34 × 10−3

3.27 × 10−4