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From: Thomas Heger <ttt_heg@web.de>
Newsgroups: sci.physics.relativity
Subject: Re: the notion of relativity of simultaneity
Date: Thu, 3 Oct 2024 09:12:20 +0200
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Am Mittwoch000002, 02.10.2024 um 22:07 schrieb Richard Hachel:
> Le 02/10/2024 à 20:54, Thomas Heger a écrit :
>>
>> 'Hyperplane' has a sigtly different meaning than 'hyperplane of 
>> present time'.
>>
>> But apparently your question was about the 'hyperplane of the present' 
>> in context of RT and not about the general case of a hyperplane in 
>> mathematics.
>>
>> In case of RT, my explanation was correct!
>>
>>
>> TH
> 
> The two notions are similar.
> 
> "Hyperplane of present time" and "hyperplane of simultaneity" are 
> synonymous (whatever the theory used, Newton, Einstein, Hachel).


Sure, but mathematicians use the term 'hyperplane' for a lot of other 
things, too, which have no connections to time.

It is like a subspace with one dimension less.


TH