Struct SMG Solver

o HYPRE_StructSMGCreate
Create a solver object
o HYPRE_StructSMGDestroy
Destroy a solver object
o HYPRE_StructSMGSetup
Prepare to solve the system.
o HYPRE_StructSMGSolve
Solve the system
o HYPRE_StructSMGSetTol
(Optional) Set the convergence tolerance
o HYPRE_StructSMGSetMaxIter
(Optional) Set maximum number of iterations
o HYPRE_StructSMGSetRelChange
(Optional) Additionally require that the relative difference in successive iterates be small
o HYPRE_StructSMGSetZeroGuess
(Optional) Use a zero initial guess.
o HYPRE_StructSMGSetNonZeroGuess
(Optional) Use a nonzero initial guess.
o HYPRE_StructSMGSetNumPreRelax
(Optional) Set number of relaxation sweeps before coarse-grid correction
o HYPRE_StructSMGSetNumPostRelax
(Optional) Set number of relaxation sweeps after coarse-grid correction
o HYPRE_StructSMGSetLogging
(Optional) Set the amount of logging to do
o HYPRE_StructSMGSetPrintLevel
(Optional) Set the amount of printing to do to the screen
o HYPRE_StructSMGGetNumIterations
Return the number of iterations taken
o HYPRE_StructSMGGetFinalRelativeResidualNorm
Return the norm of the final relative residual

SMG is a semicoarsening multigrid solver that uses plane smoothing (in 3D). The plane smoother calls a 2D SMG algorithm with line smoothing, and the line smoother is cyclic reduction (1D SMG). For periodic problems, the grid size in periodic dimensions currently must be a power-of-two.

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