Blurb::
The merit function by Tapia and Argaez
Description::
The "argaez_tapia" merit function can be classified as a modified
augmented Lagrangian function. The augmented Lagrangian is modified by
adding to its penalty term a potential reduction function to handle
the perturbed complementarity condition. The cost per linesearch
iteration is one function evaluation. For more information, see
:cite:p:`Tapia1`.

If the function evaluation is expensive or noisy, set the
``merit_function`` to "argaez_tapia" or "van_shanno".
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