.. index:: single: log_barrier(Problem,InnerSolver) .. _log_barrier/2:

.. rst-class:: right

object

log_barrier(Problem,InnerSolver)

• Problem - Problem object implementing constrained_optimization_problem_protocol. The initial point need not be strictly feasible.
• InnerSolver - Atom naming a local_optimization solver class taking a single problem parameter, e.g. bfgs or lbfgs. Constructed dynamically each outer iteration as InnerSolver(SubProblem). Interior-point log-barrier method for inequality constraints, optionally combined with a quadratic penalty for equality constraints.

  | Availability: | logtalk_load(constrained_optimization(loader))

  | Author: Paulo Moura | Version: 1:0:0 | Date: 2026-09-03

  | Compilation flags: | static, context_switching_calls

  | Imports: | public :ref:`constrained_optimization_solver <constrained_optimization_solver/0>` | public :ref:`local_optimization_solver(Problem) <local_optimization_solver/1>` | Uses: | :ref:`list <list/0>`

  | Remarks: | (none)

  | Inherited public predicates: | Â :ref:`options_protocol/0::check_option/1` Â :ref:`options_protocol/0::check_options/1` Â :ref:`options_protocol/0::default_option/1` Â :ref:`options_protocol/0::default_options/1` Â :ref:`options_protocol/0::option/2` Â :ref:`options_protocol/0::option/3` Â :ref:`local_optimization_solver/1::run/2` Â :ref:`local_optimization_solver/1::run/3` Â :ref:`local_optimization_solver/1::run/4` Â :ref:`options_protocol/0::valid_option/1` Â :ref:`options_protocol/0::valid_options/1` Â

  .. contents:: :local: :backlinks: top

Public predicates

(no local declarations; see entity ancestors if any)

Protected predicates

(no local declarations; see entity ancestors if any)

Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)

.. seealso::

:ref:`constrained_optimization_problem_protocol <constrained_optimization_problem_protocol/0>`, :ref:`augmented_lagrangian(Problem,InnerSolver) <augmented_lagrangian/2>`, :ref:`quadratic_penalty(Problem,InnerSolver) <quadratic_penalty/2>`, :ref:`sqp_active_set(Problem) <sqp_active_set/1>`, :ref:`local_optimization_solver(Problem) <local_optimization_solver/1>`, :ref:`bfgs(Problem) <bfgs/1>`, :ref:`lbfgs(Problem) <lbfgs/1>`