:orphan:
# TaoLineSearchCreate
Creates a `TaoLineSearch` object.  Algorithms in `Tao` that use line-searches will automatically create one so this all is rarely needed 
## Synopsis
```
#include "petsctaolinesearch.h" 
PetscErrorCode TaoLineSearchCreate(MPI_Comm comm, TaoLineSearch *newls)
```
Collective


## Input Parameter

- ***comm -*** MPI communicator



## Output Parameter

- ***newls -*** the new `TaoLineSearch` context



## Options Database Key

- ***-tao_ls_type -*** select which method `Tao` should use





## See Also
 [](ch_tao), `Tao`, `TaoLineSearch`, `TaoLineSearchType`, `TaoLineSearchSetType()`, `TaoLineSearchApply()`, `TaoLineSearchDestroy()`

## Level
developer

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

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/linesearch/impls/armijo/armijo.c.html#TaoLineSearchCreate_Armijo">TaoLineSearchCreate_Armijo in src/tao/linesearch/impls/armijo/armijo.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/linesearch/impls/gpcglinesearch/gpcglinesearch.c.html#TaoLineSearchCreate_GPCG">TaoLineSearchCreate_GPCG in src/tao/linesearch/impls/gpcglinesearch/gpcglinesearch.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/linesearch/impls/morethuente/morethuente.c.html#TaoLineSearchCreate_MT">TaoLineSearchCreate_MT in src/tao/linesearch/impls/morethuente/morethuente.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/linesearch/impls/owarmijo/owarmijo.c.html#TaoLineSearchCreate_OWArmijo">TaoLineSearchCreate_OWArmijo in src/tao/linesearch/impls/owarmijo/owarmijo.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/linesearch/impls/unit/unit.c.html#TaoLineSearchCreate_Unit">TaoLineSearchCreate_Unit in src/tao/linesearch/impls/unit/unit.c</A><BR>


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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)