The Mixed Finite Element Multigrid Method for Stokes Equations

Table 3

Number of iterations and CPU time for Braess-Sarazin (2diag(), ()) multigrid -cycle at different levels of refinement, tolerance = .

Levels	MG--cycle
	()	()	()	()
	Iter(cpu time (sec))	Iter(cpu time (sec))	Iter(cpu time (sec))	Iter(cpu time (sec))
	16 ()	11 ()	7 ()	5 ()
	17 ()	12 ()	7 ()	5 ()
	17 ()	13 ()	8 ()	6 ()
	16 (1.98)	13 (3.24)	8 ()	6 (5.78)