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# PCHYPRESetInterpolations
Set interpolation matrices for `PCHYPRE` type of ams or ads
## Synopsis
```
#include "petscpc.h"
PetscErrorCode PCHYPRESetInterpolations(PC pc, PetscInt dim, Mat RT_PiFull, Mat RT_Pi[], Mat ND_PiFull, Mat ND_Pi[])
```
Collective
## Input Parameters
- ***pc -*** the preconditioning context
- ***dim -*** the dimension of the problem, only used in AMS
- ***RT_PiFull -*** Raviart-Thomas interpolation matrix
- ***RT_Pi -*** x/y/z component of Raviart-Thomas interpolation matrix
- ***ND_PiFull -*** Nedelec interpolation matrix
- ***ND_Pi -*** x/y/z component of Nedelec interpolation matrix
## Notes
For AMS, only Nedelec interpolation matrices are needed, the Raviart-Thomas interpolation matrices can be set to NULL.
For ADS, both type of interpolation matrices are needed.
## Developer Note
This automatically converts the matrix to `MATHYPRE` if it is not already of that type
## See Also
`PCHYPRE`
## Level
intermediate
## Location
src/ksp/pc/impls/hypre/hypre.c
## Implementations
PCHYPRESetInterpolations_HYPRE in src/ksp/pc/impls/hypre/hypre.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/pc/impls/hypre/hypre.c)
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