.. _`apdx:findif`:


FINDIF
======

Performs finite difference computations of energy derivative, with respect to nuclear displacements for geometry optimizations and vibrational frequency analyses, where the required analytical derivatives are not available.

.. toctree::
   :hidden:
   :glob:

   findif__*


General
_______

.. include:: findif__disp_size.rst
.. include:: findif__fd_project.rst
.. include:: findif__gradient_write.rst
.. include:: findif__hessian_write.rst
.. include:: findif__normal_modes_write.rst
.. include:: findif__points.rst

