Lagrangian of classical electromagnetism without $A_{\mu}$ field
48930
Least-action classical electrodynamics without potentials
112073
What does a Lagrangian of the form $L=m^2\dot x^4 +U(x)\dot x^2 -W(x)$ represent?
43046
Do Maxwell's Equations overdetermine the electric and magnetic fields?
67641
Why should field operators satisfy the classical equations of motion?
18054
Is there a proof from the first principle that the Lagrangian L = T - V?
36380
Why not use the Lagrangian, instead of the Hamiltonian, in nonrelativistic QM?
115275
Vector field of charges
70880
Invariance of canonical Hamiltonian equation when adding the total time derivative of a function of $q_i$ and $t$ to the Lagrangian
19386
Geometric interpretation of Electromagnetism
61686
Noether's first theorem and classical proof of electric charge conservation
129289
What is the origin of the factor of $-1/4$ in the Maxwell Lagrangian?
136779
Does an classical charge that is stationary in a gravitational field radiate?
62692
Retrieving Maxwell's equations from the minimum action principle
64247
Noether Theorem and Energy conservation in classical mechanics
106021
How wrong are the classical Maxwell's equations (as compared to QED)?
35409
Massless charged particles
15275
How do you go from quantum electrodynamics to Maxwell's equations?