# PetscDSSetImplicit
Set the flag for implicit solve for this field. This is just a guide for `TSIMEX` 
## Synopsis
```
#include "petscds.h" 
PetscErrorCode PetscDSSetImplicit(PetscDS prob, PetscInt f, PetscBool implicit)
```
Not collective


## Input Parameters

- ***prob -*** The `PetscDS` object
- ***f -*** The field number
- ***implicit -*** The flag indicating what kind of solve to use for this field





## See Also
 `TSIMEX`, `PetscDSGetImplicit()`, `PetscDSSetDiscretization()`, `PetscDSAddDiscretization()`, `PetscDSGetNumFields()`, `PetscDSCreate()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/dt/interface/dtds.c.html#PetscDSSetImplicit">src/dm/dt/interface/dtds.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex45.c.html">src/ts/tutorials/ex45.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex48.c.html">src/ts/tutorials/ex48.c.html</A><BR>


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


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