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

Table 1

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

Methods	Number of iterations	Spectral radius	Rate of convergence
J	19	0.6036	0.2193
GS	9	0.3643	0.4385
SOR	5	0.1128	0.9477
CG	6
BiCG	6
MINRES	19
RGS	5	0.1327	0.8771
SRGS	3	0.0483	1.3161
-RGS	3	0.0176	1.7545
-RGS	2	0.0064	2.1938
-RGS	2	0.0023	2.6383
-RGS	2	0.00085	3.07058
-RGS	2	0.00031	3.5086
-RGS	1	0.00011	3.9586