Table 3: The basic method is divergent (Theorem 2).

MatrixMethod Convergence interval

pde225SOR 2.4937 , −0.30.7980
pde225AOR , 1.5542 , −0.50.7745
pde225SSOR , 1.1112 , 12.05400.9388
pde225SAOR , 4.9844 , 0.25100.7741
cage5SOR 1.0150 , −0.40.7425
cage5AOR , 2.0370 , −0.430.3355
cage5SSOR , 1.8715 , 2.02800.7681
cage5SAOR , 4.0002 , 0.4580.3748
pivtolSOR 4.3002 , −0.330.7778
pivtolAOR , 1.5280 , −0.580.6766
pivtolSSOR 2.1132 , −0.550.7306
pivtolSAOR , 2.6670 , −0.470.7235
bfwb782Jacobi1.0554 , −0.813050.6794
bfwb782AOR , 2.1398 , −0.40.3996
bfwb782SSOR 2.1411 , 1.55500.7748
bfwb782SAOR , 4.0000 , 0.450.3570