(reoptimizer_local_solver)=
# Local solver

Local solvers proposed by {{uranie}} come from the NLopt library (Non Linear OPTimization). This 
library is developed by Steven G. Johnson, integrating many original algorithms in an uniform 
interface. The [NLopt website](http://ab-initio.mit.edu/nlopt) provides many useful information, that 
enhance the succinct ones provided here. The example used as support for this part is given in 
[](#use_cases_macro_reoptimizer_bar_code) with a specification with respect to the way it was 
described in [](#reoptimizer_problem_example_problem): since there is no multicriteria solver 
implemented from NLopt, the criteria on the distortion is downgraded to a constraint using a randomly 
defined threshold (set to 14).

```{toctree}
local_solver/tnlopt
local_solver/solvers
```