:orphan:
# TaoSetFunctionLowerBound
Sets a bound on the solution objective value. When an approximate solution with an objective value below this number has been found, the solver will terminate. 
## Synopsis
```
#include "petsctao.h" 
PetscErrorCode TaoSetFunctionLowerBound(Tao tao, PetscReal fmin)
```
Logically Collective


## Input Parameters

- ***tao -*** the Tao solver context
- ***fmin -*** the tolerance



## Options Database Key

- ***-tao_fmin <fmin> -*** sets the minimum function value





## See Also
 [](ch_tao), `Tao`, `TaoConvergedReason`, `TaoSetTolerances()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/interface/taosolver.c.html#TaoSetFunctionLowerBound">src/tao/interface/taosolver.c</A>


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


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