:orphan:
# TaoLineSearchSetVariableBounds
Sets the upper and lower bounds for a bounded line search 
## Synopsis
```
#include "petsctaolinesearch.h" 
PetscErrorCode TaoLineSearchSetVariableBounds(TaoLineSearch ls, Vec xl, Vec xu)
```
Logically Collective


## Input Parameters

- ***ls -*** the `TaoLineSearch` context
- ***xl  -*** vector of lower bounds
- ***xu  -*** vector of upper bounds





## Note
If the variable bounds are not set with this routine, then
`PETSC_NINFINITY` and `PETSC_INFINITY` are assumed


## See Also
 [](ch_tao), `Tao`, `TaoLineSearch`, `TaoSetVariableBounds()`, `TaoLineSearchCreate()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/linesearch/interface/taolinesearch.c.html#TaoLineSearchSetVariableBounds">src/tao/linesearch/interface/taolinesearch.c</A>


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


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