:orphan:
# TSARKIMEXSetFullyImplicit
Solve both parts of the equation implicitly, including the part that is normally solved explicitly
## Synopsis
```
#include "petscts.h"
PetscErrorCode TSARKIMEXSetFullyImplicit(TS ts, PetscBool flg)
```
Logically Collective
## Input Parameters
- ***ts -*** timestepping context
- ***flg -*** `PETSC_TRUE` for fully implicit
## See Also
[](ch_ts), `TSARKIMEX`, `TSARKIMEXGetType()`, `TSARKIMEXGetFullyImplicit()`
## Level
intermediate
## Location
src/ts/impls/arkimex/arkimex.c
## Examples
src/ts/tutorials/ex36A.c
src/ts/tutorials/ex36SE.c
src/ts/tutorials/extchem.c
src/ts/tutorials/extchemfield.c
## Implementations
TSARKIMEXSetFullyImplicit_ARKIMEX in src/ts/impls/arkimex/arkimex.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ts/impls/arkimex/arkimex.c)
[Index of all TS routines](index.md)
[Table of Contents for all manual pages](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)