N = 11

t = 16

t = 36

t = 60

t = 84

Max.absolute error by implicit Euler

0.0093

2.7649E−004

7.0708E−005

7.0708E−005

Root mean square of errors by implicit Euler

0.0050

1.6835E−004

4.0801E−005

4.0801E−005

CPU time

0.024

0.024

0.029

0.029