h

τ

l -error

order

l 2 -error

order

1 2 5

1 2 2 5

0.0770

-

0.0408

-

1 2 6

1 2 2 6

0.0404

0.9305

0.0208

0.9720

1 2 7

1 2 2 7

0.0208

0.9578

0.0105

0.9862

1 2 8

1 2 2 8

0.0106

0.9725

0.0053

0.9863

1 2 9

1 2 2 9

0.0054

0.9730

0.0027

0.9730