h

$\tau$

$l^{\infty }$ -error

order

$l^2$ -error

order

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

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

0.0471

-

0.0660

-

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

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

0.0239

0.9787

0.0333

0.9869

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

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

0.0120

0.9940

0.0167

0.9957

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

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

0.0060

1.0000

0.0084

0.9914

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

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

0.0030

1.0000

0.0042

1.0000