Electrodynamic Permittivity/Electrodynamic Impedance -- Energy Of The Hamiltonian/Energy Of The Lagrangian

 Electrodynamic permittivity, has the general tendency, of eminently  controlling, the energy of the Hamiltonian; Whereas -- Electrodynamic impedance, has the general tendency, of eminently controlling, the energy of the Lagrangian. Sam.