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From: Python <python@invalid.org>
Newsgroups: sci.physics.relativity
Subject: Re: [SR and synchronization] Cognitive Dissonances and Mental
 Blockage
Date: Sun, 25 Aug 2024 09:48:31 +0200
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Le 25/08/2024 à 09:30, Maciej Wozniak a écrit :
> W dniu 25.08.2024 o 09:21, Python pisze:
>> Le 24/08/2024 à 08:40, Thomas Heger a écrit :
>>> Am Freitag000023, 23.08.2024 um 08:27 schrieb Thomas Heger:
>>>> Am Donnerstag000022, 22.08.2024 um 13:06 schrieb Python:
>>>>> Le 22/08/2024 à 08:51, Thomas Heger a écrit :
>>>>>> Am Mittwoch000021, 21.08.2024 um 09:31 schrieb Python:
>>>>>>
>>>>>>>>> Addendum : "the distance from A to B is x": this is wrong too.
>>>>>>>>> x is the coordinate of an event in system K, it is not, in
>>>>>>>>> general, the distance between origins of K and k.
>>>>>>>>
>>>>>>>> 'x' is a generic coordinate in system K and means a distance 
>>>>>>>> from the center of K to a point on the x-axis.
>>>>>>>>
>>>>>>>> Since system k was placed with its center upon the x-axis and B 
>>>>>>>> in the center of k, the distance from A to B would actually be x.
>>>>>>>
>>>>>>> Systems k and K are not even mentioned in part I.2. So "system k was
>>>>>>> placed with its center upon the x-axis and B in the center of k"
>>>>>>> is a figment of your imagination in no way related to A.E. article.
>>>>>>
>>>>>> Wrong, because definitions remain valid throughout the entire 
>>>>>> paper, unless stated otherwise.
>>>>>
>>>>> Part I.1 is in no way supposed to refer to definitions stated in
>>>>> part I.3.
>>>>
>>>> Sure, but fortunately I have not written anything like this.
>>>>
>>>> I wrote, that defintions for §1.1 remain valind in §1.3, unless the 
>>>> author states otherwise.
>>>>
>>>>
>>>>>
>>>>>> If an author defines some variable or other setting and later 
>>>>>> 'foregets' this definition, all older settings remain valid.
>>>>>
>>>>> And definitely NOT a definition of k/K that is stated LATER, moreover
>>>>> neither K nor k are mentions in part I.1.
>>>>
>>>> Sure, but apparently you wanted to discuss a certain equation form 
>>>> part 1.3 on page 3.
>>>>
>>>> That was LATER than the introduction of K and k.
>>>>
>>> SORRY!
>>>
>>> This was wrong.
>>>
>>> Me culpa!
>>>
>>> page 3 belongs to §1.1. and not to § 1.3.
>>>
>>> § 1.1 had not used two different coordinate systems in relative 
>>> motion. Those were intruduced in the next chapter § 1.2.
>>>
>>> (Sorry, but I make errors, too.)
>>
>> Good to hear. Now you may consider that you've made a LOT of errors.
>> Including below:
>>
>>> In § 1.1. we have a different setting:
>>>
>>> assumed is a single coordinate system, where Newton's equations are 
>>> valid and an euclidan space, in which that coordinate system is 
>>> stationary.
>>>
>>>
>>> This setting is slightly different to the ones in the subsequent 
>>> chapters.
>>
>> This setting is what allows to make sense of sytems k, K, etc. later.
>>
>>> In fact Einstein assumed here some forcefree 'flat' Euclidean space, 
>>> in which one single coordinate system would be considered.
>>
>>> This setting is more or less motionless, hence different to the 
>>> setting in the following chapters.
>>
>> Nothing prevent considering several coordinate systems of the same kind,
>> in relative motion wrt each others. This is actually what he's doing
>> there.
>>
>>> I personally had sorted the mentioned variables in a certain way, 
>>> which was actually different than Einstein's.
>>
>> Again adding stuff that is asinine and unrelated to what Einstein
>> actually wrote?
>>
>>> For me such a single coordinate system in a forcefree euclidean space 
>>> would allow only one single time measure, which is valid troughout 
>>> this entire coordinate system.
>>
>> This is basically ok.
>>
>>> Clocks could not be synchronised by light signals, however, because 
>>> light needs time to travel.
>>
>> Einstein (following Poincaré's work) showed 
> 
> Whatever you say - Poincare had enough wit
> to [idiotic whining]

Whatever (yawn)...

I've just receive this book by the post:

Einstein's clocks and Poincaré's maps
by Peter Galison

https://archive.org/details/einsteinsclocksp00gali