> Coordinate transformations do not involve physically changing
> the physical events that the coordinates describe.

Sure they do.
tau = (t-vx/c^2)/sqrt(1-v^2/c^2)
 is a function of x as well as v.
 tau    t     x      v
 5.77   0   -10    0.5
 0.00   0     0    0.5
-5.77   0    10    0.5

> The original poster seems to think that Lorentz transformations
> move things around.  They don't.  They just apply new coordinates
> to them.
>
> John Anderson

Rubbish, I've just proved that is wrong with a spreadsheet table.
The time at x = 10 is -5.77 and at x = -10 is 5.77 for v = 0.5c

It's nonsense of course, but then, so is everything about relativity.
Androcles