M

$E_2$ error

Rate

$E_{\infty }$ error

Rate

10

1.9923e−02

--

1.1289e−02

--

12

6.9134e−03

5.8051

2.8648e−03

7.5214

14

1.0059e−03

12.5047

5.8600e−04

10.2947

16

4.1586e−04

6.6146

2.0181e−04

7.9831

18

2.5697e−04

4.0872

1.4630e−04

2.7308

20

1.3513e−04

6.1004

7.6041e−05

6.2111