Generalized Preconditioned MHSS Method for a Class of Complex Symmetric Linear Systems

Table 5

Numerical results for GPMHSS with 𝑃₁=𝑇 and 𝑃₂=𝑊.

𝑚	8×8	16×16	24×24	32×32
𝛼^∗𝐺	1.3	1.3	1.3	1.3
𝛽^∗𝐺	1.7	1.4	1.4	2.2
𝜌(𝑀𝛼^∗𝐺,𝛽^∗𝐺)	0.2644	0.2988	0.3044	0.3191
RES	4.7850𝑒−7	5.349𝑒−7	9.151𝑒−7	8.141𝑒−7
CPU(s)	0.015	0.031	0.078	0.172
IT	15	18	18	20
Speed-up	1	26.71	95.15	246.09