.. SPDX-FileCopyrightText: 2022 Dominik Vilsmeier

   SPDX-License-Identifier: GPL-3.0-or-later


Optimizers
==========

The available optimizers are listed in the `API documentation <optim_>`_.

The convergence criteria of the optimizers vary slightly, but are mainly
determined by the ``ftol``, ``gtol`` and ``xtol`` parameters. These refer
to, respectively, the change of cost, the norm of the gradient and the change
of the parameter values during each iteration.
The implementation follows `scipy_least_squares`_.


.. _optim: ../../api/accinv.optim.html
.. _scipy_least_squares: https://docs.scipy.org/doc/scipy/reference/generated/scipy.optimize.least_squares.html