I have read many articles questions and even the original paper, yet the actual proof of the formula escapes me.
I'd really appreciate it if someone can outline the logical skeleton of the proof, but my question goes even beyond that: What I mean is that the quantity of energy in one electron is a scalar that has no justification or reason, neither mathematical, nor logic, like the number of beans in a jar, how can its value be derived mathematically (from what formula[e]) or inferred logically (from what premises?)
Edit after the closure:
I did read the quoted links, what I am questioning here is the epistemology of those articles and links, what scientific value does such a proof have, if any?