PCMGSetRestriction#
Sets the function to be used to restrict dual vectors from level l to l-1.
Synopsis#
#include "petscksp.h"
PetscErrorCode PCMGSetRestriction(PC pc, PetscInt l, Mat mat)
Logically Collective
Input Parameters#
pc - the multigrid context
l - the level (0 is coarsest) to supply [Do not supply 0]
mat - the restriction matrix
Notes#
Usually this is the same matrix used also to set the interpolation for the same level.
One can pass in the interpolation matrix or its transpose; PETSc figures out from the matrix size which one it is.
If you do not set this, the transpose of the Mat set with PCMGSetInterpolation()
is used.
See Also#
Level#
advanced
Location#
Examples#
src/dm/impls/stag/tutorials/ex4.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages