Table 1: Comparison of spectral radius with preconditioner .

)

100 0.5636 0.8635 0.7404 0.8999 0.6288
200 0.6030 0.9195 0.7698 0.9473 0.7059
5000.61200.97510.78440.98470.7103

1000.36500.79060.59230.85300.4770
2000.45100.88320.65070.92400.5769
5000.43450.97300.67660.98350.5609

1000.23870.75120.66470.80870.3602
2000.34940.84910.58000.90090.4899
5000.35690.95610.62840.97310.5019
10000.36740.97380.63160.98400.5173