Richard Clark wrote:
It was Lorentz that described time dilation (using the speed of light)
in 1887 and formalized in 1899, and it was Poincaré who introduced
this math in 1905, not Einstein.

It was Einstein who first recognized that the Lorentz
transforms actually applied to reality and were not
just another useful set of purely mathematical
transforms. If Lorentz and Poincare had recognized
that fact, they would have gotten credit for the
theory of relativity but guess who got the credit?
Hint: The guy who nailed down the speed of light as
an absolute in his relativity equations. Nowhere have
I ever read that the mathematicians, Lorentz or Poincare,
ever suspected that the speed of light in a vacuum was
a fixed absolute. That concept was left to a physicist.

he "nailed it down" in his equations

is an slur on Maxwell, Lamor, Lorentz, and Poincaré's contributions
that predate Einstein by decades.

No slur intended or implied so it must be a mistaken
inference on your part. You obviously jumped to a wrong
conclusion and do not understand what I meant by "nailed
it down". If everything is relative, then nothing is
fixed. By declaring the speed of light in a vacuum to be
a fixed absolute, Einstein nailed down the cornerstone
of his theory. Relativity needed a reference nailed down.
Einstein nailed down the speed of light as that reference.
In my context, "set it in concrete" would be synonym for
"nailed it down". I do believe the speed of light in a
vacuum is set in concrete within the theory of relativity.

You are walking around a vacant lot and find a rope. You
want to experiment with waves using the rope. You "nail
down" one end of the rope and apply energy at the other
end. Are you slurring the inventors and/or manufacturers
of the rope? Please explain how.
--
73, Cecil http://www.w5dxp.com