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From: Python <python@invalid.org>
Newsgroups: sci.physics.relativity
Subject: Re: New version of my annotations to SRT
Date: Fri, 19 Apr 2024 10:23:56 +0200
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Le 19/04/2024 à 07:50, Thomas Heger a écrit :
[...]
> The system k had tall Greek letters as names of the axes:
> Xsi, Eta and Zeta.
> 
> Here Einstein made an error, too, because once defined these names had 
> to be used.

Xsi intervenes several times from the sentence "For a ray of light 
emitted at the time $\tau =0$ in the direction of the increasing $\xi$"
a few paragraphs later. All of them intervenes after the sentence
"Substituting for x' its value, we obtain :"

> In my role as a hypothetical professor, who had to write corrections, I 
> freaked out a little at this point and wrote a big red 'F' on the first 
> page on the paper.

In my role as a hypothetical ophthalmologist I freak out a lot and
advise you to buy glasses.