Table 1: Error estimate in maximum norm when .

Computational cost Reduction Computational cost Reduction 1 0.1560 0.0159   0.3130 0.0356   2 0.5780 0.0062 2.56 1.1560 0.0137 2.60 4 2.3440 0.0026 2.38 4.6080 0.0058 2.36 8 9.2810 0.0012 2.17 18.6800 0.0026 2.23