Electrodes and segments

Here we collect together all the topics that deal with the geometry of the system being simulated  -the electrodes and the segments into which they are divided.

In the boundary-element method used in the CPO programs the system is fully described by the electrodes.  There is no need to define an array of nodes in the empty spaces inside the electrodes.

We also deal here with the voltages applied to the electrodes.

Please note because the BEM method is based on surface charges, that the term 'electrode' is  usually used to refer to the surface of an electrode, rather than the whole physical entity.