h

$\tau$

$l^{\infty }$ -error

order

$l^2$ -error

order

$\frac{1}{2^5}$

$\frac{1}{3\cdot 2^5}$

0.1016

-

0.0539

-

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

$\frac{1}{3\cdot 2^6}$

0.0535

0.9253

0.0276

0.9656

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

$\frac{1}{3\cdot 2^7}$

0.0277

0.9497

0.0140

0.9792

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

$\frac{1}{3\cdot 2^8}$

0.0142

0.9640

0.0071

0.9795

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

$\frac{1}{3\cdot 2^9}$

0.0072

0.9798

0.0035

1.0205