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

Table 6

Convergence results for IGPMHSS with 𝑃₁=𝑃₂=𝑊.

(𝛼𝐺,𝛽𝐺)	𝑚	𝜏=0.95			𝜏=0.9			𝜏=0.85
		it.s	avg1	avg2	it.s	avg1	avg2	it.s	avg1	avg2
(0.8, 2)	16	55	21.5	22.5	69	26.3	27.1	82	30.4	30.8
(0.8, 1.6)	24	82	32.1	33.1	105	39.4	40.1	125	45.8	46.1
(0.8, 1.4)	32	108	43.4	42.7	139	52.8	52.4	167	61.3	60.8
(0.8, 1.2)	64	160	95.4	54.2	190	96.4	70.2	198	96.9	80.8
(0.8, 1.2)	128	185	95.1	91.7	178	95.2	92.3	184	95.3	91.9