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# PCHYPREAMSSetInteriorNodes
Set the list of interior nodes to a zero-conductivity region for `PCHYPRE` of type ams
## Synopsis
```
#include "petscpc.h"
PetscErrorCode PCHYPREAMSSetInteriorNodes(PC pc, Vec interior)
```
Collective
## Input Parameters
- ***pc -*** the preconditioning context
- ***interior -*** vector. node is interior if its entry in the array is 1.0.
## Note
This calls `HYPRE_AMSSetInteriorNodes()`
## Developer Note
If this is only for `PCHYPRE` type of ams it should be called `PCHYPREAMSSetInteriorNodes()`
## See Also
`PCHYPRE`, `PCHYPRESetDiscreteGradient()`, `PCHYPRESetDiscreteCurl()`, `PCHYPRESetAlphaPoissonMatrix()`
## Level
intermediate
## Location
src/ksp/pc/impls/hypre/hypre.c
## Implementations
PCHYPREAMSSetInteriorNodes_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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