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From: Python <python@invalid.org>
Newsgroups: sci.physics.relativity
Subject: Re: [SR and synchronization] Cognitive Dissonances and Mental
 Blockage
Date: Wed, 21 Aug 2024 09:31:02 +0200
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Le 21/08/2024 à 08:30, Thomas Heger a écrit :
> Am Dienstag000020, 20.08.2024 um 08:42 schrieb Python:
>> Le 20/08/2024 à 08:39, Python a écrit :
>>> Le 20/08/2024 à 08:30, Thomas Heger a écrit :
>>>> Am Montag000019, 19.08.2024 um 14:56 schrieb Python:
>>>> ...
>>>>>> There is also no equation, which could eventually be interpreted 
>>>>>> as delay calculation.
>>>>>
>>>>> As I've shown there is. A single step from the provided equations
>>>>> leads to t_A = t_B - (AB)/c
>>>>>
>>>>>> Delay for a signal from A->B in distance x would be:
>>>>>>
>>>>>> x=c*t => delay (A->B)= x/c
>>>>>>
>>>>>> Extremely simple, isn't it?
>>>>>
>>>>> Extremely stupid insteed x=c*t is not generally true. x/c is
>>>>> not at all the delay your asking for. (AB)/c is such a delay.
>>>>
>>>> Einstein defined two coordinate systems (K and k).
>>>>
>>>> System k was placed with its center upon the axis of x of system K.
>>>>
>>>> So the value 'x' is a coordinate in respect to system K  with 
>>>> distance |x| to system K's center.
>>>>
>>>> Now I use this setting and place A in the center of K and B in the 
>>>> center of k.
>>>>
>>>> So: the distance from A to B is x.
>>>>
>>>> Well, yes, this was a little bad, because I had to explain it in the 
>>>> first place, before I could use this setting.
>>>
>>> What you "explain" is, again, something you made up out of nothing.
>>>
>>> Systems K and k are even defined yet in paragraph 2.
>>>
>>> It makes basically no sense to put the center of K at A and the
>>> center of k at B. K and k are in relative motion while clock-A
>>> and clock-B are mutually at rest. So your "setting" is setting
>>> v to 0.
>>
>> 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.

> But, of course, your critique is valid and you should not use generic 
> variables for special purposes.
> 
> Therefore I made already the proposal to call the distance from A to B 'd'.

AB, (AB) or \overbar(AB) make the job for every one but you.

> BTW: x was not meant as coordinate of an event, because system K and k 
> were defined as Euclidian coordinate systems.

> Such a coordinate system does not contain time in any way, hence cannot 
> address events.

k and K are defined as 4-D dimensional systems with coordinates
x, y, z, t and epsilon, nu, eta, tau. BOTH include a time coordinate
so BOTH are representing EVENTS.

"does not contain time in any way" ? How can you be so clueless ??? Or
is it deliberates lies ???