# PCBDDCSetDirichletBoundaries
Set IS defining Dirichlet boundaries for the global problem. 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCBDDCSetDirichletBoundaries(PC pc, IS DirichletBoundaries)
```
Collective


## Input Parameters

- ***pc -*** the preconditioning context
- ***DirichletBoundaries -*** parallel IS defining the Dirichlet boundaries





## Note
Provide the information if you used `MatZeroRows()` or `MatZeroRowsColumns()`. Any process can list any global node


## See Also
 `PCBDDC`, `PCBDDCSetDirichletBoundariesLocal()`, `MatZeroRows()`, `MatZeroRowsColumns()`

## Level
intermediate

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

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex71.c.html">src/ksp/ksp/tutorials/ex71.c.html</A><BR>

## Implementations

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