# DMKSPGetComputeOperators
get `KSP` matrix evaluation function 
## Synopsis
```
#include "petscksp.h" 
PetscErrorCode DMKSPGetComputeOperators(DM dm, PetscErrorCode (**func)(KSP, Mat, Mat, void *), void *ctx)
```
Not Collective


## Input Parameter

- ***dm -*** `DM` used with a `KSP`



## Output Parameters

- ***func -*** matrix evaluation function, see `KSPSetComputeOperators()` for calling sequence
- ***ctx -*** context for matrix evaluation





## See Also
 [](chapter_ksp), `DMKSP`, `DM`, `KSP`, `DMKSPSetContext()`, `KSPSetComputeOperators()`, `DMKSPSetComputeOperators()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/interface/dmksp.c.html#DMKSPGetComputeOperators">src/ksp/ksp/interface/dmksp.c</A>


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


[Index of all KSP routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
