PETSc version 3.15.5
PCMGSetInterpolation
Sets the function to be used to calculate the interpolation from l-1 to the lth level 
Synopsis
#include "petscksp.h" 
PetscErrorCode  PCMGSetInterpolation(PC pc,PetscInt l,Mat mat)
Logically Collective on PC
Input Parameters
|  | pc | - the multigrid context | 
|  | mat | - the interpolation operator | 
|  | l | - the level (0 is coarsest) to supply [do not supply 0] | 
Notes
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.
See Also
 PCMGSetRestriction()
Level
advanced
Location
src/ksp/pc/impls/mg/mgfunc.c
Examples
src/ksp/ksp/tutorials/ex42.c.html
Index of all PC routines
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Index of all manual pages