迭代法

$8\times 8$

$16\times 16$

$32\times 32$

$64\times 64$

PMHSS

${\alpha }_{opt}$

0.4029

0.3795

0.3589

0.3438

IT

32

33

34

35

CPU

0.0604

0.5637

13.3296

422.7802

RES (e−7)

6.5594

8.5023

8.5826

9.2327

MPMHSS

${\alpha }_{opt}$

0.4029

0.3795

0.3589

0.3438

${\mu }_{opt}$

0.0524

0.0469

0.0473

0.0473

IT

28

30

31

31

CPU

0.0239

0.1154

1.9316

30.0267

RES (e−7)

7.9096

8.1575

8.6728

9.6342

GMRES (20)

IT

178

444

939

1638

RES (e−7)

9.6000

9.8000

1.0000

9.9000