Euler-Lagrange equations in General Relativity
983
Use partial or covariant derivatives when deriving equations of a field theory?
138908
Most general Lagrangian in CFT in 0+1D
155913
Lagrangian for free particle in special relativity
150407
Gravitational wave solutions to the Einstein field equations
151855
Non-linearity and self-coupling of gravity
60751
General relativity and the conservation of momentum
137796
Local translations in curved spacetime
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?
22205
What is the weight equation through general relativity?
95267
Ricci scalar for Black Hole
38538
Euler's equations of rigid body motion from least action principle
42392
Derivation of Maxwell's equations from field tensor lagrangian
29329
Does a four-divergence extra term in a Lagrangian density matter to the field equations?
26736
Reason for vanishing of the covariant derivative of energy-momentum tensor of matter in general relativity
43976
Is the description of the gravitational field as a vector field and a tensor field compatible?
37024
Textbook on the Geometry of Special Relativity
98358
A variational problem with a lagrangian , what is the lagrangian?