SMG is a parallel semicoarsening multigrid solver for the linear
systems arising from finite difference, finite volume, or finite
element discretizations of the diffusion equation,
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(7.1) |
SMG is a particularly robust method. The algorithm semicoarsens in the z-direction and uses plane smoothing. The xy plane-solves are effected by one V-cycle of the 2D SMG algorithm, which semicoarsens in the y-direction and uses line smoothing.