Table 3: The order of convergence at , , .

order order

0.8 0.083831920.08300304
0.4 0.07424489 0.17520793 0.05061152 0.71369837
0.2 0.07833790 −0.07817543 0.04448503 0.18614587
0.1 0.07972878 −0.02539013 0.04573242 −0.03989733
0.05 0.08009801 −0.00666580 0.04606181 −0.01035383
0.025 0.08019167 −0.00168598 0.04614408 −0.00257446