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Path: ...!news.misty.com!weretis.net!feeder9.news.weretis.net!i2pn.org!i2pn2.org!.POSTED!not-for-mail From: hitlong@yahoo.com (gharnagel) Newsgroups: sci.physics.relativity Subject: Re: Paper Series: Shift-symmetry in =?UTF-8?B?RWluc3RlaW7igJlzIFVuaXZl?= =?UTF-8?B?cnNl?= Date: Thu, 11 Jul 2024 13:33:32 +0000 Organization: novaBBS Message-ID: <e4b72864404f2a4818efd7146d1581f4@www.novabbs.com> References: <6eabaae3ef6df5f08df87109682109e5@www.novabbs.com> <v6o311$2c8du$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Info: i2pn2.org; logging-data="2914417"; mail-complaints-to="usenet@i2pn2.org" User-Agent: Rocksolid Light X-Rslight-Site: $2y$10$QNSfDtZ2TgxnBMjJZodvbuoAt8ZHPUBWuSyFGHNHvrAo5EoTV2FZO X-Rslight-Posting-User: 47dad9ee83da8658a9a980eb24d2d25075d9b155 Bytes: 1311 Lines: 10 On Thu, 11 Jul 2024 7:53:05 +0000, Mikko wrote: > > Perfect conservation of energy is not essential to relativity. However, > relativity requires that if energy or momentum is conserved then both > are. Our universe seems quite rigid about conservation of both. > The time direction symmetry is not an essential part of relativity. Our universe seems quite rigid about that, too.