SymSymR4
========

This class represents a rank four tensor with symmetries
:math:`C_{ijkl} = C_{jikl}`, :math:`C_{ijkl} = C_{ijlk}`, and
:math:`C_{ijkl} = C_{klij}`.  It is stored as a length 36 vector with the 
convention described :ref:`here <conventions>`.

.. doxygenclass:: neml::SymSymR4
   :members:
   :undoc-members: