I dare to relativists to explain local time: t-vx/c²

Originally, local time was FOUND by Voigt in 1887. Here is the link:
https://en.wikisource.org/wiki/Translation:On_the_Principle_of_Doppler
Go to equations 8 and 10.
Lorentz "borrowed" Voigt's local time, without crediting him.
Einstein "borrowed" Lorentz local time, without crediting him (or
Voigt).
Efforts have been made extensively, in the last century, to GIVE A
MEANING to what is, without any doubt, a MATHEMATICAL ARTIFACT. This is
an undesired outcome of THE INTRINSIC FAILURES EMBEDDED INTO SR MATH
development.
Even using Minkowski, AS OF TODAY the expression:
t-vx/c²
couldn't be EXPLAINED AS IF IT POSSESSES THE MEREST PHYSICAL MEANING.
Can anyone here give it a try?
BTW: For Voigt and his sound waves plus Doppler effect, it had a
meaning.
If you want to verify why it's a MATHEMATICAL ARTIFACT, read Einstein's
1905 paper, on
§ 3. Theory of the Transformation of Co-ordinates and Times from a
Stationary System to another System in Uniform Motion of Translation
Relatively to the Former
From fifth equation plus the resourceful use of x' = x - vt (Galileo)
Good luck, relativists.