Some more interesting discussions with Ed Dellian has resulted in this ‘summary’, made in context with my current level of understanding of Catt Theory of electromagnetism):

1. Energy current (E-vector) causes momentum p.
2. Causality is made via the proportionality coefficient c (speed of energy current)
3. Momentum p is what mediates between E-vector and changes in the matter.
4. Momentum p is preserved as energy current hits the matter.
5. Momentum in the matter presents another form of energy (E-scalar).
6. E-scalar characterises the elements of the matter as they move with a (material) velocity.
7. As elements of the matter move they cause changes in Energy current (E-vector) and this forms a fundamental feedback mechanism (which is recursive/fractal …).

Telling this in terms of EM theory and electricity:

• E-vector (Poynting vector aka Heaviside signal) causes E-scalar (electric current in the matter).
• This causality between E-vector and E-scalar is mediated by momentum p causing the motion of charges.
• The motion of charges with material velocity causes changes in E-vector, i.e. the feedback effect mentioned above (e.g. self-induction)

I’d be most grateful if someone refutes these items and bullets.

I also recommend to read my blog (from 2014) on discretisation

On Quantisation and Discretisation of Electromagnetic Effects in Nature