N

K = 3

K = 4

K = 6

K = 12

Error

Order

Error

Order

Error

Order

Error

Order

10

1.814e−3

9.131e−4

3.771e−4

9.040e−5

20

3.771e−4

−2.27

2.070e−4

−2.14

9.040e−5

−2.06

2.237e−5

−2.01

30

1.625e−4

−2.08

9.040e−5

−2.04

3.987e−5

−2.02

9.922e−6

−2.01

40

9.040e−5

−2.04

5.054e−5

−2.02

2.237e−5

−2.01

5.578e−6

−2.00