# PCBDDCSetPrimalVerticesIS
Set additional user defined primal vertices in `PCBDDC` 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCBDDCSetPrimalVerticesIS(PC pc, IS PrimalVertices)
```
Collective


## Input Parameters

- ***pc -*** the preconditioning context
- ***PrimalVertices -*** index set of primal vertices in global numbering (can be empty)





## Note
Any process can list any global node


## See Also
 `PCBDDC`, `PCBDDCGetPrimalVerticesIS()`, `PCBDDCSetPrimalVerticesLocalIS()`, `PCBDDCGetPrimalVerticesLocalIS()`

## Level
intermediate

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

## Implementations

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