# DMSNESSetJacobian
set `SNES` Jacobian evaluation function 
## Synopsis
```
#include "petscsnes.h" 
#include "petscdm.h" 
PetscErrorCode DMSNESSetJacobian(DM dm, PetscErrorCode (*J)(SNES, Vec, Mat, Mat, void *), void *ctx)
```
Not Collective


## Input Parameters

- ***dm -*** `DM` to be used with `SNES`
- ***J -*** Jacobian evaluation function
- ***ctx -*** context for residual evaluation





## Note
`SNESSetJacobian()` is normally used, but it calls this function internally because the user context is actually
associated with the `DM`.


## Developer Note
This makes the interface consistent regardless of whether the user interacts with a `DM` or
not. If `DM` took a more central role at some later date, this could become the primary method of setting the Jacobian.


## See Also
 `DMSNESSetContext()`, `SNESSetFunction()`, `DMSNESGetJacobian()`, `SNESSetJacobian()`, `SNESJacobianFunction`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/utils/dmsnes.c.html#DMSNESSetJacobian">src/snes/utils/dmsnes.c</A>


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