{c}

TODO understand in detail.

<Advanced quantum mechanics by Freeman Dyson (1951)> mentions:
> A Relativistic Quantum Theory of a Finite Number of Particles is Impossible.

<Atom 2007 Mini Series episode 3>:
> \[The <Dirac equation>\] could only describe a single electron. It fails completely to explain what happens when there is more than one electron present. What was needed was a new theory. A theory which explains how electrons interact with each other. 


 The Dirac equation does not work for more than one electron

ID: the-dirac-equation-does-not-work-for-more-than-one-electron