# PCMGSetX#

Sets the vector to be used to store the solution on a particular level.

## Synopsis#

#include "petscksp.h"
PetscErrorCode PCMGSetX(PC pc, PetscInt l, Vec c)


Logically Collective

## Input Parameters#

• pc - the multigrid context

• l - the level (0 is coarsest) this is to be used for (do not supply the finest level)

• c - the Vec

## Note#

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.

PCMG, PCMGSetRhs(), PCMGSetR()