[15] Note that this also automatically involves a host of
other types of controversial displacement currents, such as
d~/dt, dV/dt, dE/dt, dP/dt, dD/dt, etc. The literature is
thoroughly floundering as to exactly how all these currents
are related, together with the Slepian vector J~ and the
Poynting vector S, as well as the "normal" current dq/dt.
We will be discussing the "master key" for these
relationships in future articles.