PCSYSPFMG#

the hypre SysPFMG multigrid solver

Options Database Keys#

-pc_syspfmg_its its - number of iterations of SysPFMG to use as preconditioner
-pc_syspfmg_num_pre_relax steps - number of smoothing steps before coarse grid
-pc_syspfmg_num_post_relax steps - number of smoothing steps after coarse grid
-pc_syspfmg_tol tol - tolerance of SysPFMG
-pc_syspfmg_relax_type (Weighted- Jacobi|Red/Black-Gauss-Seidel) - relaxation type for the up and down cycles

See PCPFMG for hypre’s PFMG that works for a scalar PDE and PCSMG

See PCHYPRE for hypre’s BoomerAMG algebraic multigrid solver

This is for CELL-centered descretizations

This must be used with the MATHYPRESSTRUCT matrix type.

This does not give access to all the functionality of hypres SysPFMG, it supports only one part, and one block per process defined by a PETSc DMDA.

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