# DMTSGetIJacobian
get `TS` Jacobian evaluation function 
## Synopsis
```
#include "petscts.h" 
PetscErrorCode DMTSGetIJacobian(DM dm, TSIJacobian *func, void **ctx)
```
Not Collective


## Input Parameter

- ***dm -*** `DM` to be used with `TS`



## Output Parameters

- ***func -*** Jacobian evaluation function, see `TSSetIJacobian()` for calling sequence
- ***ctx -*** context for residual evaluation





## Note
`TSGetJacobian()` is normally used, but it calls this function internally because the user context is actually
associated with the `DM`.  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
 [](chapter_ts), `DM`, `TS`, `DMTSSetContext()`, `TSSetFunction()`, `DMTSSetJacobian()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/utils/dmts.c.html#DMTSGetIJacobian">src/ts/utils/dmts.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ts/utils/dmts.c)


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