Table 2: The order of convergence at .

order order

0.8 4.162964672.78665608
0.4 1.21228931 1.77987727 0.68462204 2.02515531
0.2 0.31752640 1.93278558 0.18175645 1.91330117
0.1 0.08009801 1.9803824 0.04606181 1.98036355
0.05 0.01932448 2.05133680 0.01122974 2.03624657
0.025 0.00530959 1.86375722 0.00304044 1.88497250