# PCBDDCGetDirichletBoundariesLocal
Get parallel `IS` for Dirichlet boundaries (in local ordering) 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCBDDCGetDirichletBoundariesLocal(PC pc, IS *DirichletBoundaries)
```
Collective


## Input Parameter

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



## Output Parameter

- ***DirichletBoundaries -*** index set defining the subdomain part of Dirichlet boundaries





## Note
The `IS` returned could be the same passed in earlier by the user (if provided with `PCBDDCSetDirichletBoundariesLocal()`)
or a global-to-local map of the global `IS` (if provided with `PCBDDCSetDirichletBoundaries()`).
In the latter case, the `IS` will be available only after `PCSetUp()`.


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

## Level
intermediate

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

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/bddc/bddc.c.html#PCBDDCGetDirichletBoundariesLocal_BDDC">PCBDDCGetDirichletBoundariesLocal_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)


[Index of all PC routines](index.md)  
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