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

Table 7

Convergence results for IGPMHSS with 𝑃₁=𝑃₂=𝑇.

(𝛼𝐺,𝛽𝐺)	𝑚	𝜏=0.95			𝜏=0.9			𝜏=0.85
		it.s	avg1	avg2	it.s	avg1	avg2	it.s	avg1	avg2
(1.2, 2.2)	16	49	21.7	15.6	60	26.7	19.5	71	30.8	22.2
(1.2, 1.9)	24	70	29.7	21.8	91	38.1	28.1	109	45.0	33.0
(1.2, 1.8)	32	90	37.1	27.6	119	48.7	36.8	144	58.4	43.4
(1.2, 1.6)	64	157	92.5	54.2	200	93.2	75.1	200	93.1	88.6
(1.2, 1.6)	128	192	92.3	89.1	192	92.3	90.4	192	92.4	91.6