N = 11

t = 6.0

t = 12

t = 22

t = 34

Max.absolute error by implicit Euler

0.0220

0.0176

0.0012

0.0012

Root mean square of errors by implicit Euler

0.0134

0.0089

6.8117E−004

6.8188E−004

CPU time

0.021

0.017

0.024

0.038