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# PCBDDCGetNeumannBoundaries
Get parallel `IS` for Neumann boundaries 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCBDDCGetNeumannBoundaries(PC pc, IS *NeumannBoundaries)
```
Not Collective


## Input Parameter

- ***pc -*** the preconditioning context



## Output Parameter

- ***NeumannBoundaries -*** index set defining the Neumann boundaries





## Note
The `IS` returned (if any) is the same passed in earlier by the user with `PCBDDCSetNeumannBoundaries()`


## See Also
 `PCBDDC`, `PCBDDCSetNeumannBoundaries()`, `PCBDDCGetDirichletBoundaries()`, `PCBDDCSetDirichletBoundaries()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/bddc/bddc.c.html#PCBDDCGetNeumannBoundaries">src/ksp/pc/impls/bddc/bddc.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/bddc/bddc.c.html#PCBDDCGetNeumannBoundaries_BDDC">PCBDDCGetNeumannBoundaries_BDDC in src/ksp/pc/impls/bddc/bddc.c</A><BR>


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


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