:orphan:
# PCMGGetInterpolation
Gets the function to be used to calculate the interpolation from l-1 to the lth level 
## Synopsis
```
#include "petscksp.h" 
PetscErrorCode PCMGGetInterpolation(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]



## Output Parameter

- ***mat -*** the interpolation matrix, can be `NULL`





## See Also
 `PCMG`, `PCMGGetRestriction()`, `PCMGSetInterpolation()`, `PCMGGetRScale()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/mg/mgfunc.c.html#PCMGGetInterpolation">src/ksp/pc/impls/mg/mgfunc.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/pc/impls/mg/mgfunc.c)


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