Table 2.

Errors for first- and “second-order” schemes for example shown in Fig. 5

Grid	L2 error		L∞ error
	First-order	Second-order	First-order	Second-order
212	0.00645	0.00533	0.01221	0.02034
412	0.00339	0.00117	0.00642	0.00644
812	0.00165	0.00022	0.00315	0.00203
1612	0.00084	0.00005	0.00159	0.00071