Proof of the existence of the energy-momentum tensor
135071
Energy momentum tensor from Noether's theorem
66193
How to prove that a flat spacetime admits Minkowski coordinates?
148934
Proof of Archimedes Principle
69983
Photon energy - momentum in matter
109358
Prove the Curvature Tensor is a Tensor
28416
Show that $\partial_\nu T^{\mu\nu} = - j_\nu F^{\mu\nu}$
4421
Proof that total derivative is the only function that can be added to Lagrangian without changing the EOM
68523
Am I doing this right? Finding the time derivative of expectation value of momentum
44239
Why the extra term $\frac{1}{2}(\partial_{\rho}A^{\rho})^2$ in the photon Lagrangian?
104244
Is the Momentum Operator a Postulate?
80596
Ambiguities in the energy-momentum tensor
45061
Physical interpretation of $Q^i = \partial _\nu T^{i \nu}$
60751
General relativity and the conservation of momentum
56911
Proving invariance of $ds^2$ from the invariance of the speed of light
29329
Does a four-divergence extra term in a Lagrangian density matter to the field equations?
155492
Exercise on local and global symmetry for a given Lagrangian density
57097
Massless particle in FRW metric