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Table 2 Error of u in example ( 53 )

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

Difference scheme N  =  M  = 20 N  =  M  = 40 N  =  M  = 80 N  =  M  = 160
First order of the ADS 3.78 × 10−3 1.78 × 10−3 8.63 × 10−4 4.24 × 10−4
Second order of the ADS 3.88 × 10−4 9.74 × 10−5 2.44 × 10−5 6.10 × 10−6