Field equations and relations | Field functions, 4-currents |
Field equations | Divergences of field tensors, 4-currents |
Motion equation | Products of field tensors and 4-currents or divergences of fields’ stress-energy tensors |
Energy, Lagrangian, Hamiltonian | 4-potentials, field tensors and 4-currents |
Equation for the metric | The Ricci tensor, scalar curvature, fields’ stress-energy tensors |
Gauge of 4-potentials | Divergences of 4-potentials |
Continuity equations | Divergences of 4-currents, field tensors, the Ricci tensor |