# TSGetI2Function
Returns the vector where the implicit residual is stored and the function/context to compute it. 
## Synopsis
```
#include "petscts.h"  
PetscErrorCode TSGetI2Function(TS ts, Vec *r, TSI2Function *fun, void **ctx)
```
Not Collective


## Input Parameter

- ***ts -*** the `TS` context



## Output Parameters

- ***r -*** vector to hold residual (or NULL)
- ***fun -*** the function to compute residual (or NULL)
- ***ctx -*** the function context (or NULL)





## See Also
 [](chapter_ts), `TS`, `TSSetIFunction()`, `SNESGetFunction()`, `TSCreate()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/interface/ts.c.html#TSGetI2Function">src/ts/interface/ts.c</A>


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


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