On Dec 24, 7:57*pm, Tom Roberts wrote:
...
We know now that SR's domain of applicability includes all aspects of
Minkowski spacetime, and doesn't include any other base manifold. Of
course SR is the local limit of GR in any manifold, but that is only
approximate.

Tom, I would appreciate a reference to a published demonstration that
SR is the approximate limit of GR. I thought Einstein wasted the last
40 years of his life trying to unify these two theories. Isn't this
why quantum-gravity is still a hot research topic: SR is about
electromegnetism (and so, eventually covered by QM) while GR is about
gravity?