Interpreting $Q_i=\partial_{\nu}T^{i \nu}$ from dust
45061
Physical interpretation of $Q^i = \partial _\nu T^{i \nu}$
80596
Ambiguities in the energy-momentum tensor
61038
Understanding the Details of the Construction of the Tensor Product
9641
An explanation of Hawking Radiation
106506
How to derive completeness relation in quantum field theory with a Lorentz invariant measure?
120857
Interpreting the Cross Section Ratio $R$
47845
Mirror algorithm for computing $\pi$ and $e$ - does it hint on some connection between them?
36152
Bessel function representation of spacelike KG propagator
94041
Interpretation Born-Von Karman boundary conditions
28145
What is $\Gamma(z) \Gamma(\bar {z})$?
22133
Why is the covariant derivative of the determinant of the metric zero?
151937
Physical Significance of $8\pi r$
16644
Why does cancellation of dots $\frac{\partial \dot{\mathbf{r}}_i}{\partial \dot{q}_j} = \frac{\partial \mathbf{r}_i}{\partial q_j}$ work?
111928
Solving a Casimir configuration, the U - bracket
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?
29152
Conversion of the Polyakov action into the Nambo-Goto action?
120474
Does the lagrangian contain all the information about the representations of the fields in QFT?