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# TSAdjointSetUp
Sets up the internal data structures for the later use of an adjoint solver
## Synopsis
```
#include "petscts.h"
PetscErrorCode TSAdjointSetUp(TS ts)
```
Collective
## Input Parameter
- ***ts -*** the `TS` context obtained from `TSCreate()`
## See Also
[](ch_ts), `TSCreate()`, `TSAdjointStep()`, `TSSetCostGradients()`
## Level
advanced
## Location
src/ts/interface/sensitivity/tssen.c
## Implementations
TSAdjointSetUp_ARKIMEX in src/ts/impls/arkimex/arkimex.c
TSAdjointSetUp_RK in src/ts/impls/explicit/rk/rk.c
TSAdjointSetUp_Theta in src/ts/impls/implicit/theta/theta.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ts/interface/sensitivity/tssen.c)
[Index of all Sensitivity routines](index.md)
[Table of Contents for all manual pages](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)