h

L^∞ error

r

L² error

r

H¹ error

r

1/8

1.4335E−02

-

4.3446E−03

-

1.8989E−01

-

1/16

4.2037E−03

1.77

1.0918E−03

1.99

9.5306E−02

0.99

1/32

1.2171E−03

1.79

2.7324E−04

2.00

4.7710E−02

1.00

1/64

3.4726E−04

1.81

6.8287E−05

2.00

2.3863E−02

1.00

1/128

9.7623E−05

1.83

1.6953E−05

2.01

1.1933E−02

1.00