$N+1$

5

10

20

40

80

$\underset{n}{\max }{\Vert e^n\Vert }_{\infty }$

$1.784\times {10}^{-1}$

$4.368\times {10}^{-2}$

$1.073\times {10}^{-2}$

$2.805\times {10}^{-3}$

$8.861\times {10}^{-3}$

$\underset{n}{\max }{\Vert e^n\Vert }_1$

$9.264\times {10}^{-2}$

$2.461\times {10}^{-2}$

$6.211\times {10}^{-3}$

$1.602\times {10}^{-3}$

$4.674\times {10}^{-4}$

Conv.rate

1.919

1.987

1.954

1.778