From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: SI units updated Date: Wed, 3 Oct 2018 21:47:48 +0200 Organization: Aioe.org NNTP Server Message-ID: References: <4b58915a-1e25-4470-bf6b-6de7ff8e5fb6@googlegroups.com> <0646c57a-4be2-402f-b55c-bb684433eb8a@googlegroups.com> <8e0c1dc6-7098-473a-b811-3d7d0f87fff1@googlegroups.com> <48565c2c-54bb-47f8-993f-3c077f2c6fdd@googlegroups.com> NNTP-Posting-Host: IzvqdhUtDGKIMCldyDtZ+w.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 X-Notice: Filtered by postfilter v. 0.8.3 Content-Language: en-US Xref: reader02.eternal-september.org comp.lang.ada:54478 Date: 2018-10-03T21:47:48+02:00 List-Id: On 2018-10-03 19:33, AdaMagica wrote: > Am Mittwoch, 3. Oktober 2018 09:21:45 UTC+2 schrieb Dmitry A. Kazakov: >> Time is no physical dimensioned value. > > Interesting. What's it then? Not everything is a dimensioned value, obviously. For one time point has identity. Physical values do not. Two equal values are just same. Time is like location of some object. Co-ordinates of the location are physical values. 3D vector of the location is a physical value. The location itself is not. Similarly duration is a physical value, epoch is not. Answering the question I would say that time is a 3D surface in 4D time-space of some frame of reference. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de