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Path: ...!2.eu.feeder.erje.net!3.eu.feeder.erje.net!feeder.erje.net!fdn.fr!usenet-fr.net!pasdenom.info!from-devjntp Message-ID: <3_55BPOgqiL20L5rUo2xG_Vp8ZQ@jntp> JNTP-Route: nemoweb.net JNTP-DataType: Article Subject: Re: the notion of relativity of simultaneity References: <t5AySA2aWT46Ra7AsAZqm8Hc3GM@jntp> <Eo6FW0ebVNtRJTtSEACnwT1LEhc@jntp> <lm1kgtFln9eU4@mid.individual.net> <eSz70Yi5kNfROFnEqcEhT63f9RQ@jntp> Newsgroups: sci.physics.relativity JNTP-HashClient: 1-ooPUv7yTvOKPWiXXJG630IGNk JNTP-ThreadID: M03ir3sQnaKnoNUOGTo8wLgKNI8 JNTP-ReferenceUserID: 4@nemoweb.net JNTP-Uri: https://www.nemoweb.net/?DataID=3_55BPOgqiL20L5rUo2xG_Vp8ZQ@jntp User-Agent: Nemo/1.0 JNTP-OriginServer: nemoweb.net Date: Tue, 01 Oct 24 12:54:07 +0000 Organization: Nemoweb JNTP-Browser: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0 Injection-Info: nemoweb.net; posting-host="40a55bdddef5204a9fdb971842680846092dc979"; logging-data="2024-10-01T12:54:07Z/9043799"; posting-account="190@nemoweb.net"; mail-complaints-to="julien.arlandis@gmail.com" JNTP-ProtocolVersion: 0.21.1 JNTP-Server: PhpNemoServer/0.94.5 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-JNTP-JsonNewsGateway: 0.96 From: Python <python@not-formail.invalid> Bytes: 2732 Lines: 43 Le 01/10/2024 à 14:36, Richard Hachel a écrit : > Le 01/10/2024 à 08:52, Thomas Heger a écrit : >> Am Dienstag000001, 01.10.2024 um 02:34 schrieb Python: >>> Le 01/10/2024 à 00:52, Richard "Hachel" Lengrnd a écrit : >>>> One of the most fundamental problems in the history of humanity and >>>> the very basis of the notion of relativity of simultaneity: how to >>>> synchronize two watches so that they give the same time at the same >>>> present moment? >>>> >>>> A little explanation would have been welcome. >>>> >>>> Of course, in a Newtonian universe, it is not difficult. >>>> >>>> But in a relativistic universe where each observer has his own >>>> hyperplane of present time? >>> >>> What do you mean by "hyperlane"? >> >> The set of all points, which could be connected to an events by a >> hypothetical signal with infinite velocity builds actually a three >> dimensional space. >> >> In RT-lingo, this is a hyperplane (of the present). >> >> Imagine you would 'flatten' space to a 2-dimensional sheet. >> >> >> TH >> >>> ... > > > Why do you answer him? You can see that he is crazy. > > He claims to be a great expert in relativity, but he is incapable of > understanding what a simple "hyperplane" is. > > R.H. I do know what a hyperplane is :-) Neither Thomas nor you do :-)