An introduction to optimal design
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.. figure:: ../figures/under_work.png
   :scale: 40 %

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One may consult the very interesting textbook :cite:`hecht2024pde` about the FreeFem implementation of many PDE-constrained optimization problems.

.. toctree::
   :maxdepth: 2
   :caption: Contents:

   Density methods <density.rst>
   Geometric optimization <geometric.rst>
   The level set method <geometricLS.rst>
   Topological derivatives <topder.rst>
   Shape optimization for fluids <sofluids.rst>