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# DMTSGetI2Function
get `TS` implicit residual evaluation function for 2nd order systems 
## Synopsis
```
#include "petscts.h" 
PetscErrorCode DMTSGetI2Function(DM dm, TSI2Function *fun, void **ctx)
```
Not Collective


## Input Parameter

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



## Output Parameters

- ***fun -*** function evaluation function, for calling sequence see `TSSetI2Function()`
- ***ctx -*** context for residual evaluation





## Note
`TSGetI2Function()` is normally used, but it calls this function internally because the user context is actually
associated with the `DM`.


## See Also
 [](ch_ts), `DM`, `TS`, `DMTSSetI2Function()`, `TSGetI2Function()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/utils/dmts.c.html#DMTSGetI2Function">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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