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7.2 PFMG

PFMG is a parallel semicoarsening multigrid solver similar to SMG. See [1,5] for details on the algorithm and its parallel implementation/performance.

The main difference between the two methods is in the smoother: PFMG uses simple pointwise smoothing. As a result, PFMG is not as robust as SMG, but is much more efficient per V-cycle.


next up previous contents index
Next: 7.3 BoomerAMG Up: 7. Solvers and Preconditioners Previous: 7.1 SMG   Contents   Index
Tom Treadway 2003-10-22