.. _TrustRegion:

Trust Region Minimizer
======================

This minimizer is a hybrid
`Gauss-Newton <https://en.wikipedia.org/wiki/Gauss%E2%80%93Newton_algorithm>`__/`Quasi-Newton <https://en.wikipedia.org/wiki/Quasi-Newton_method>`__
method, that makes use of a `trust region <https://en.wikipedia.org/wiki/Trust_region>`__.

It is a reimplementation of part of `RALFit_nonlinear least squares solver <https://github.com/ralna/RALFit>`__.

It is listed in :ref:`a comparison of fitting minimizers <FittingMinimizers Minimizer Comparison>`.

Reference
---------

* A higher order method for solving nonlinear least-squares problems, N.I.M. Gould, T.Rees, and J.A. Scott, RAL-P-2017-010

.. categories:: FitMinimizers