EM Lagrangian in terms of gauge fields
17451
Expanding electromagnetic field Lagrangian in terms of gauge field
4421
Proof that total derivative is the only function that can be added to Lagrangian without changing the EOM
63473
Is the shorthand $ \partial_{\mu} $ strictly a partial derivative in field theory?
36403
Gauge symmetry is not a symmetry?
119258
Electromagnetic field and continuous and differentiable vector fields
105660
Invariance of action $\Rightarrow$ covariance of field equations?
99312
Why Lagrangian is negative number for a relativistic massive point particle?
31369
To which extent is general relativity a gauge theory?
10953
Elementary argument for conservation laws from symmetries *without* using the Lagrangian formalism
112073
What does a Lagrangian of the form $L=m^2\dot x^4 +U(x)\dot x^2 -W(x)$ represent?
155492
Exercise on local and global symmetry for a given Lagrangian density
17414
Lagrangian of an effective potential
102564
Energy-momentum tensor transformation
98358
A variational problem with a lagrangian , what is the lagrangian?
27296
Derivation of Lagrangian of electromagnetic field from Lorentz force
153727
Constant term in Lagrangian
48930
Least-action classical electrodynamics without potentials