Table 1.

Errors for first- and “second order” schemes for example shown in Fig. 4.

Grid	L2 error		L∞ error
	First-order	Second-order	First-order	Second-order
212	0.00818	0.00753	0.01500	0.02161
412	0.00432	0.00142	0.00785	0.00559
812	0.00213	0.00024	0.00386	0.00130
1612	0.00108	0.00004	0.00195	0.00031