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# PCBDDCSetPrimalVerticesLocalIS
Set additional user defined primal vertices in `PCBDDC`
## Synopsis
```
#include "petscpc.h"
PetscErrorCode PCBDDCSetPrimalVerticesLocalIS(PC pc, IS PrimalVertices)
```
Collective
## Input Parameters
- ***pc -*** the preconditioning context
- ***PrimalVertices -*** index set of primal vertices in local numbering (can be empty)
## See Also
`PCBDDC`, `PCBDDCSetPrimalVerticesIS()`, `PCBDDCGetPrimalVerticesIS()`, `PCBDDCGetPrimalVerticesLocalIS()`
## Level
intermediate
## Location
src/ksp/pc/impls/bddc/bddc.c
## Examples
src/ksp/ksp/tutorials/ex59.c
## Implementations
PCBDDCSetPrimalVerticesLocalIS_BDDC in src/ksp/pc/impls/bddc/bddc.c
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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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