h

L^∞ error

r

L² error

r

H¹ error

r

1/8

2.1580E−02

-

4.9749E−03

-

1.5893E−01

-

1/16

6.4194E−03

1.75

1.2544E−03

1.99

8.0310E−02

0.98

1/32

1.8578E−03

1.79

3.1446E−04

2.00

4.0287E−02

1.00

1/64

5.2742E−04

1.82

7.8683E−05

2.00

2.0163E−02

1.00

1/128

1.4757E−04

1.84

1.9675E−05

2.00

1.0084E−02

1.00