How is the action for a point particle defined in general relativity?
141128
Action of a massive free point-particle in relativistic mechanics
23729
Four-velocity in General-relativistic geodesic equation
115490
Is particle superposition reflected in the particle's gravitational footprint?
13644
Is the change in the Lagrangian always a total derivative for symmetry transformations of the action?
94782
General relativity (gravitation) in time and one spatial dimension
44650
Several stationary points of the action functional
88525
Action and Action integral: Different kinds of variational principles
158214
General relativity: is curvature of spacetime really required or just a convenient representation?
45586
General Relativity 2-Body Closed Form
141320
Particle energy in general relativity?
131072
Why do physicists believe that particles are pointlike?
42584
Curved space-time VS change of coordinates in Minkowski space
87259
Constraints of relativistic point particle in Hamiltonian mechanics
42036
Why should an action integral be stationary? On what basis did Hamilton state this principle?
23399
Nature of spacetime 4-vector and tangent space?
23243
Extended Rigid Bodies in Special Relativity
67334
what is the difference between a blackhole and a point particle