How do you determine the Lagrangian?
18054
Is there a proof from the first principle that the Lagrangian L = T - V?
112073
What does a Lagrangian of the form $L=m^2\dot x^4 +U(x)\dot x^2 -W(x)$ represent?
158526
Finding a "Principle of Least Action" equivalent statement for Hamiltonian Mechanics
139597
Lagrange Multiplier
68523
Am I doing this right? Finding the time derivative of expectation value of momentum
17451
Expanding electromagnetic field Lagrangian in terms of gauge field
27296
Derivation of Lagrangian of electromagnetic field from Lorentz force
96604
How do I calculate how an object will move from one point to another?
129289
What is the origin of the factor of $-1/4$ in the Maxwell Lagrangian?
72721
Do an action and its Euler-Lagrange equations have the same symmetries?
40355
Equivalence between Hamiltonian and Lagrangian Mechanics
72129
Finding the correct units for the energy-momentum tensor?
112209
Landau's argument for dependence of Lagrangian on magnitude of velocity
126142
Action principle, Lagrangian mechanics, Hamiltonian mechanics, and conservation laws when assuming Aristotelian mechanics $F=mv$
120474
Does the lagrangian contain all the information about the representations of the fields in QFT?
99789
Beyond Hamiltonian and Lagrangian mechanics
106667
Which equation to use for simple harmonic motion?