#include "petscksp.h" PetscErrorCode PCMGSetR(PC pc,PetscInt l,Vec c)Logically Collective on PC and Vec
|pc||- the multigrid context|
|l||- the level (0 is coarsest) this is to be used for|
|c||- the space|
Notes: If this is not provided PETSc will automatically generate one.
You do not need to keep a reference to this vector if you do not need it PCDestroy() will properly free it.