Nodes (x, y)

The Chebyshev nodes

The equidistant nodes

m = 8

m = 16

m = 32

m = 8

m = 16

(0.1, 0.1)

3.8528e−11

7.4940e−16

2.4980e−16

3.6538e−11

9.3405e−07

(0.3, 0.3)

8.1330e−12

1.6653e−15

1.6653e−15

1.3789e−11

2.6547e−06

(0.5, 0.5)

5.5622e−14

2.5535e−15

2.4425e−15

8.3724e−12

3.9562e−06

(0.7, 0.7)

4.0140e−12

2.4425e−15

1.2212e−15

5.8561e−12

4.6331e−06

(0.9, 0.9)

5.8634e−12

2.9976e−15

2.9976e−15

1.5618e−11

4.5786e−06