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Table 1 Maximum absolute errors for Example 1 at number of mesh points 2N

From: Accelerated fitted operator finite difference method for singularly perturbed delay differential equations with non-local boundary condition

ε

N = 32

N = 64

N = 128

N = 256

N = 512

10−4

6.8161e−06

1.7125e−06

4.2918e−07

1.0743e−07

2.6988e−08

 

1.9928

1.9964

1.9982

1.9930

 

10−8

6.8161e−06

1.7125e−06

4.2918e−07

1.0743e−07

2.6988e−08

 

1.9928

1.9964

1.9982

1.9930

 

10−12

6.8161e−06

1.7125e−06

4.2918e−07

1.0743e−07

2.6988e−08

 

1.9928

1.9964

1.9982

1.9930

 

10−16

6.8161e−06

1.7125e−06

4.2918e−07

1.0743e−07

2.6988e−08

 

1.9928

1.9964

1.9982

1.9930

 

10−20

6.8161e−06

1.7125e−06

4.2918e−07

1.0743e−07

2.6988e−08

 

1.9928

1.9964

1.9982

1.9930