Lagrangian for the motion in a null geodesic
34788
Lagrangian for relativistic massless point particle
134095
How to approximate acceleration from a trajectory's coordinates?
40355
Equivalence between Hamiltonian and Lagrangian Mechanics
97780
Deriving Newton's Third Law from homogeneity of Space
35181
Integrals of Motion
62692
Retrieving Maxwell's equations from the minimum action principle
84684
Force equations for a particle in a non-inertial frame of reference
73045
Transitioning between Lagrangian and Eulerian fluid variables
94004
Boundedness of general relativity Hamiltonian
28946
Derivation of Spin Lagrangian
95981
Gravity in 2d space and inverse linear law
30992
How do you determine the Lagrangian?
10785
Form of the Classical EM Lagrangian
123026
Rigid motion on $\mathbb{R}^2$ which fixes the origin is linear
45131
Derivation of equations of motion in Nordstrom's theory of scalar gravity?
112187
Is there a way to see that $ \nabla_\mu g_{\nu \rho} = 0 $ without explicit computation, where $\nabla_\mu$ refers to the covariant derivative?
51122
Lagrangian of Schrodinger field