Emergent Spacetime and Electrodynamics from the Phase of a Harmonic Field — Expository Presentation

Expository presentation of a mathematical framework linking the Maxwell, Einstein and Dirac equations through the Hessian of the phase of a harmonic field in flat Euclidean ℝ⁴. Does not propose a new physical theory; takes the three equations as empirical facts and shows that, once contained in the same Hessian, they are not independent. Formal proofs are omitted; the reader is referred to the full technical works.