$h_i$

2⁻¹

2⁻²

2⁻³

2⁻⁴

2⁻⁵

${\tau }_i$

2⁻³

2⁻⁵

2⁻⁷

2⁻⁹

2⁻¹¹

$\Vert V_{h_i}^{{\tau }_i}-V_{h_{i+1}}^{{\tau }_{i+1}}\Vert$

0.244918662404

0.124353001772

0.0624187467475

0.0311224397851

Order

0.98

0.99

1.00

1.00