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).