PCMGalerkinType#

Determines if the coarse grid operators are computed via the Galerkin process

Synopsis#

typedef enum {
  PC_MG_GALERKIN_BOTH,
  PC_MG_GALERKIN_PMAT,
  PC_MG_GALERKIN_MAT,
  PC_MG_GALERKIN_NONE,
  PC_MG_GALERKIN_EXTERNAL
} PCMGGalerkinType;

Values#

PC_MG_GALERKIN_PMAT - computes the pmat (matrix from which the preconditioner is built) via the Galerkin process from the finest grid
PC_MG_GALERKIN_MAT - computes the mat (matrix used to apply the operator) via the Galerkin process from the finest grid
PC_MG_GALERKIN_BOTH - computes both the mat and pmat via the Galerkin process (if pmat == mat the construction is only done once
PC_MG_GALERKIN_NONE - neither operator is computed via the Galerkin process, the user must provide the operator