Table 3: Convergence rate in time for (46) with and .

-norm -norm c. rate CPUT (seconds)

0.001 1/4 3.0985 4.2525 0.218
0.001 1/16 1.0789 1.4807 1.5221 0.413
0.001 1/32 3.6702 5.0372 1.5556 0.921
0.001 1/64 1.1772 1.6156 1.6406 1.855
0.001 1/128 3.0704 4.2139 1.6388 3.783