Lorentz-covariant wave equation for a relativistic scalar field: (□ + m²c²/ℏ²) φ = 0. First attempt at a relativistic QM; positive and negative energy solutions.
Lorentz-covariant wave equation for a relativistic scalar field: (□ + m²c²/ℏ²) φ = 0. First attempt at a relativistic QM; positive and negative energy solutions.