Grid Size

${\text{Rate}}_{L_2}$

${\text{Rate}}_{L_{\infty }}$

$L_2$

$L_{\infty }$

11 ´ 11

2.9385

2.0235

0.1671

0.0285

21 ´ 21

2.2367

1.9896

0.1869

0.0463

31 ´ 31

1.8976

1.4781

0.2139

0.0512

41 ´ 41

1.2145

1.2797

0.3913

0.0710

51 ´ 51

1.1135

1.0923

0.5524

0.0989