Intuition behind the use of the Principle of Stationary Action in Classical Field Theory
63069
Why the Principle of Least Action?
101727
Dirac's remark that inspired Feynman when formulating path integral
136779
Does an classical charge that is stationary in a gravitational field radiate?
8450
Classical field limit of the electron quantum field
18054
Is there a proof from the first principle that the Lagrangian L = T - V?
61209
Interpretation of the Dirac-measure property
105660
Invariance of action $\Rightarrow$ covariance of field equations?
132834
Trying to understand relativistic action of a massive point particle
26817
Quantum Field Theory from a mathematical point of view
40340
How general is the Lagrangian quantization approach to field theory?
120474
Does the lagrangian contain all the information about the representations of the fields in QFT?
116314
On-shell and off-shell transformations in Noether's theorem
70891
Work done by a homogeneous gravitational field on a system of particles
141949
Tree level QFT and classical fields/particles
141907
Haag's theorem and practical QFT computations
17754
Intuitive Understanding of the constant "$e$"
20962
Derivation of Archimedes' principle