###################### Dielectric constants ###################### The macroscopic dielectric constant of a semiconductor, computed with the ``dft_eps`` task, and then handed to a Koopmans calculation as ``eps_inf``. The tutorial explains why a Koopmans calculation on a solid wants that number in the first place, and what happens to the band structure if you get it wrong. .. note:: This tutorial has not been written yet. It is tracked by `issue #69 `_.