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A specific reference frame that describes its coordinates in a manner that does not depend on time and is isotropic.
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How to understand continuity equation intuitively as Lorenz covariant?
As we know, it is natural that we derive the differential form of continuity equation
$${\frac {\partial \rho }{\partial t}}+\nabla \cdot \mathbf {j} =0$$
from the integral form, in the view of absolu …
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How to understand continuity equation intuitively as Lorenz covariant?
I think I have some thoughts on my question after thinking for a while. Still waiting for other illuminating discussions.
We cannot simply consider continuity equation as a general incompressible flow …