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From: Thomas Heger <ttt_heg@web.de>
Newsgroups: sci.physics.relativity
Subject: Re: [SR and synchronization] Cognitive Dissonances and Mental
 Blockage
Date: Tue, 27 Aug 2024 07:41:30 +0200
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Am Montag000026, 26.08.2024 um 12:14 schrieb Richard Hachel:
> Le 26/08/2024 à 07:47, Thomas Heger a écrit :
>>
>> To illustrate the problem of Einstein's naming conventions, I write 
>> now, what these names actually meant:
>>
>>
>> K is a cartesian coordinate system, assumed to be at rest, 
>> non-rotating and unaccelerated in an Euclidean space, which is assumed 
>> to 'flat' and force free.
>>
>> The orientations of the axes (of x, y and z) were not mentioned, but I 
>> use this setting:
>> x points right
>> y points 'inside' (if x and z define a two-dimensional plane, like the 
>> one you draw on)
>> z points up (because z is usually used for hight)
>>
>>
>> k is an equally normed coordinate system, which moves with velocity v 
>> along the x-axis of K 'to the right'. The coordinates had Greek 
>> letters as names (xsi, eta, zeta).
>>
>>
>> K' is a coordinate system with the same features as K, but which moves 
>> from the center of k along the xsi-axis of k 'to the left' with 
>> velocity -v
>>
>>
>> k' is the same, but moving to the left with velocity -w along the 
>> xsi-axis of k. (the difference between K' and k' is a diffent velocity 
>> w in case of k').
>>
>>
>> But how could possibly anybody interpret the names K, k, K' and k' in 
>> this way?
>>
>> It required careful investigations to find out, what was actually meant.
>>
>> And the used names themselves gave absolutely no hints, about how 
>> these symbols shall be interpreted.
>>
>> In short: it is a very obscure system to name things!
>>
>> Usually you need to find a way, by which things get names in a 
>> consistent manner, which the reader could eventually remember
> 
> What you say is very interesting.
> 
Well, thanks.

But this isn't such a nice story at all.

In a way this problem with naming coordinate systems was just the 'tip 
of the iceberg'.

But the reuse of symbols or -for instance- to define something one way, 
but not sticking to this definition, are also observable.

Especially annoying were the reuse of the letter A and the symbol x'.

There were actually eight different uses for the tall latin 'A' in this 
paper.

But how could any reader keep track of the intended meaning in a certain 
context?



TH