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Path: ...!3.eu.feeder.erje.net!feeder.erje.net!proxad.net!feeder1-2.proxad.net!usenet-fr.net!pasdenom.info!from-devjntp Message-ID: <9XmDx4LiSP4Ab5xw39gAr7f4AxM@jntp> JNTP-Route: nemoweb.net JNTP-DataType: Article Subject: Re: the notion of relativity of simultaneity References: <t5AySA2aWT46Ra7AsAZqm8Hc3GM@jntp> <Eo6FW0ebVNtRJTtSEACnwT1LEhc@jntp> Newsgroups: sci.physics.relativity JNTP-HashClient: rjzOV6EhFwqbK6V-faVlBpDhG7o JNTP-ThreadID: M03ir3sQnaKnoNUOGTo8wLgKNI8 JNTP-ReferenceUserID: 190@nemoweb.net JNTP-Uri: https://www.nemoweb.net/?DataID=9XmDx4LiSP4Ab5xw39gAr7f4AxM@jntp User-Agent: Nemo/1.0 JNTP-OriginServer: nemoweb.net Date: Tue, 01 Oct 24 12:22:11 +0000 Organization: Nemoweb JNTP-Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36 Injection-Info: nemoweb.net; posting-host="e8cbf2474b472b9bb79db3dccb6a856bc1d05409"; logging-data="2024-10-01T12:22:11Z/9043758"; posting-account="4@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: Richard Hachel <r.hachel@liscati.fr.invalid> Bytes: 1723 Lines: 13 Le 01/10/2024 à 02:34, Python a écrit : >> But in a relativistic universe where each observer has his own hyperplane of >> present time? > > What do you mean by "hyperlane"? I don't have to answer that. If I answer that, tomorrow you'll ask me: "I read in one of your posts you wrote (a+b)(a-b)=a²-b². What do you mean by (a+b)(a-b)=a²-b² R.H.