h

$\tau$

$l^{\infty }$ -error

order

$l^2$ -error

order

$\frac{1}{2^6}$

$\frac{1}{2^6}$

0.1542

-

0.0799

-

$\frac{1}{2^7}$

$\frac{1}{2^7}$

0.0814

0.9217

0.0413

0.9521

$\frac{1}{2^8}$

$\frac{1}{2^8}$

0.0421

0.9512

0.0210

0.9758

$\frac{1}{2^9}$

$\frac{1}{2^9}$

0.0215

0.9695

0.0106

0.9863

$\frac{1}{2^{10}}$

$\frac{1}{2^{10}}$

0.0109

0.9800

0.0053

1.0000