Re: Division by zero

Am Mittwoch000005, 05.02.2025 um 08:48 schrieb Mikko:
...

This is actually not true, because Einstein wrote this:
>
" We first define τ as a function of x', y, z, and t. ..."

>
No need to revise my comment. The problem was to determine τ from x, y, z,
and t. The variable x' is just an intermediate step in that process.
>

The meaning of x' was also not defined properly and I'm still chewing on the problem to estimate, which interpretation is actually correct.

>
The definition x' was x' = x - vt, leaving no room for interpretations.

>
If a variable x' as 'intermediate step' without a meaning would be introduced, then the equation is no longer a representation of the real world.

 Irrelevant as Einstein defined x' when introduced it.
 

Almost none of his variables were defined properly.
But Einstein wrote actually:
"If we place x'= x − vt"
'...we place ...' sounds like he meant some sort of position of something, which is placed there.
 From the context would fit 'position of a mirror on the x-axis of K', because a mirror could be placed there.
So far, so good.
But: if we place a mirror there, the equation does not fit!
This is so, because x is belonging to K, too, because it is a variable in Latin letters, which belong to K.
 From the context of x, we are able to assume, that the position of an event in K was meant with x, which has a certain x-coordinate, why x has a fixed value in K
But if we subtract v*t from that x, the position x' would move, while the placed mirror shouldn't.
So: what else was actually meant?
TH