:orphan:
# PCSetDM
Sets the DM that may be used by some preconditioners 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCSetDM(PC pc, DM dm)
```
Logically Collective


## Input Parameters

- ***pc -*** the preconditioner context
- ***dm -*** the dm, can be NULL





## Developer Note
The routines KSP/SNES/TSSetDM() require the dm to be non-NULL, but this one can be NULL since all it does is
replace the current DM


## See Also
 `PCGetDM()`, `KSPSetDM()`, `KSPGetDM()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/interface/pcset.c.html#PCSetDM">src/ksp/pc/interface/pcset.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/pc/interface/pcset.c)


[Index of all PC routines](index.md)  
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[Index of all manual pages](/manualpages/singleindex.md)