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# PCBDDCGetPrimalVerticesIS
Get user defined primal vertices set with `PCBDDCSetPrimalVerticesIS()` 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCBDDCGetPrimalVerticesIS(PC pc, IS *is)
```
Collective


## Input Parameter

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



## Output Parameter

- ***is -*** index set of primal vertices in global numbering (`NULL` if not set)





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

## Level
intermediate

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

## Implementations

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