# PCBDDCSetChangeOfBasisMat
Set user defined change of basis for dofs 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCBDDCSetChangeOfBasisMat(PC pc, Mat change, PetscBool interior)
```
Collective on pc


## Input Parameters

- ***pc -*** the preconditioning context
- ***change -*** the change of basis matrix
- ***interior -*** whether or not the change of basis modifies interior dofs





## See Also
 `PCBDDC`

## Level
intermediate

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

## Implementations

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