.. _diffusion-octahedron:

diffusion/octahedron.py
=======================

**Description**


Diffusion (Laplace-like) equation with non-isotropic diffusion
coefficient.

Find :math:`t` such that:

.. math::
    \int_{\Omega} K_{ij} \nabla_i s \nabla_j t
    = 0
    \;, \quad \forall s \;.


.. image:: /../gallery/images/diffusion-octahedron.png


:download:`source code </../examples/diffusion/octahedron.py>`

.. literalinclude:: /../examples/diffusion/octahedron.py

