Generalized Refinement of Gauss-Seidel Method for Consistently Ordered 2-Cyclic Matrices

Table 2

Comparison of J, GS, SOR, and GRGS methods.

Methods	Number of iterations	Spectral radius	Rate of convergence
J	39	0.7071	0.1505
GS	20	0.5	0.3010
SOR	11	0.1716	0.7655
CG	5
BiCG	8
MINRES	33
RGS	10	0.0.25	0.6021
SRGS	7	0.125	0.9031
-RGS	5	0.0.0625	1.2041
-RGS	4	0.0313	1.5045
-RGS	4	0.0156	1.8069
-RGS	3	0.0078	2.1079
-RGS	3	0.0039	2.4089
-RGS	3	0.002	2.699
-RGS	2	0.001	3