MGSetInterpolate

Sets the function to be used to calculate the interpolation on the lth level.

#include "petscsles.h" 
#include "petscmg.h"   
int MGSetInterpolate(PC pc,int l,Mat mat)

Collective on PC and Mat

Usually this is the same matrix used also to set the restriction 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.

multigrid, set, interpolate, level