MLI

Parameter options for the smoothed aggregation preconditioner MLI
Parameter options for the smoothed aggregation preconditioner MLI.

outputLevel xxx
where xxx is the output level for diagnostics.
method xxx
where xxx is either {\sf AMGSA} (default), {\sf AMGSAe}, to indicate which MLI algorithm is to be used.
numLevels xxx
where xxx is the maximum number of levels (default=30) used.
maxIterations xxx
where xxx is the maximum number of iterations (default = 1 as preconditioner).
cycleType xxx
where xxx is either 'V' or 'W' cycle (default = 'V').
strengthThreshold xxx
strength threshold for coarsening (default = 0).
smoother xxx
where xxx is either {\sf Jacobi}, {\sf BJacobi}, {\sf GS}, {\sf SGS}, {\sf HSGS} (SSOR,default), {\sf BSGS}, {\sf ParaSails}, {\sf MLS}, {\sf CGJacobi}, {\sf CGBJacobi}, or {\sf Chebyshev}.
numSweeps xxx
where xxx is the number of smoother sweeps (default = 2).
coarseSolver xxx
where xxx is one of those in 'smoother' or {\sf SuperLU} (default).
minCoarseSize xxx
where xxx is the minimum coarse grid size to control the number of levels used (default = 3000).
Pweight xxx
where xxx is the relaxation parameter for the prolongation smoother (default 0.0).
nodeDOF xxx
where xxx is the degree of freedom for each node (default = 1).
nullSpaceDim xxx
where xxx is the dimension of the null space for the coarse grid (default = 1).
useNodalCoord xxx
where xxx is either 'on' or 'off' (default) to indicate whether the nodal coordinates are used to generate the initial null space.
saAMGCalibrationSize xxx
where xxx is the additional null space vectors to be generated via calibration (default = 0).
numSmoothVecs xxx
where xxx is the number of near null space vectors used to create the prolongation operator (default = 0).
smoothVecSteps xxx
where xxx is the number of smoothing steps used to generate the smooth vectors (default = 0).

In addition, to use 'AMGSAe', the parameter 'haveSFEI' has to be sent into the FEI using the parameters function (this option is valid only for the Sandia FEI implementation).

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