Path: ...!news.misty.com!weretis.net!feeder6.news.weretis.net!usenet.blueworldhosting.com!diablo1.usenet.blueworldhosting.com!feeder.usenetexpress.com!tr1.iad1.usenetexpress.com!69.80.99.22.MISMATCH!local-2.nntp.ord.giganews.com!news.giganews.com.POSTED!not-for-mail NNTP-Posting-Date: Sun, 24 Mar 2024 17:03:03 +0000 Subject: Re: New addition to the list of Relativity Critics/Skeptics Newsgroups: sci.physics.relativity References: <3dacfdddc9713967b4dd62ef45180f28@www.novabbs.com> <1qqj6wp.1ob5jmyjy6g6dN%nospam@de-ster.demon.nl> <826f3b6ef703d9d1e307600940a6acee@www.novabbs.com> <1qqjdh9.1pen0glzuxdjN%nospam@de-ster.demon.nl> <814a21bed83def7b73667b4ca8932ca2@www.novabbs.com> <1qqolco.zgpjd4v2qwqmN%nospam@de-ster.demon.nl> <1qqxcvq.14yja6r18mi9htN%nospam@de-ster.demon.nl> From: Ross Finlayson Date: Sun, 24 Mar 2024 10:03:03 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <1qqxcvq.14yja6r18mi9htN%nospam@de-ster.demon.nl> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Message-ID: Lines: 98 X-Usenet-Provider: http://www.giganews.com X-Trace: sv3-LxnXCFda+X0bjr1pJOlBzSus0SbzIb0ARW5g8HAOpfLQTE3jeSkQbo526vZLYKUfU57gYeZPq/SVR1y!ue35Et7PJOWWf8tR2YDUXPNEYmw7Db+A5mmaENQr7py9Fv4dMlld5QvDLUPuYhbabIQR1xg8CEWW!og== X-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 5862 On 03/24/2024 07:09 AM, J. J. Lodder wrote: > LaurenceClarkCrossen wrote: > >> You're mistaken about infinity not being in Euclid's parallel lines >> according to his article: >> >> "He began by studying Euclid's postulate that a straight line has infinite >> length." >> >> >> "THE PARALLEL POSTULATE" >> >> Author(s): Raymond H. Rolwing and Maita Levine >> >> Source: The Mathematics Teacher, Vol. 62, No. 8 (DECEMBER 1969), pp. 665-669 >> >> Published by: National Council of Teachers of Mathematics >> >> Stable URL: http://www.jstor.org/stable/27958258 >> >> I think that the geometries opposed to Euclid do not contradict his >> because they depart from plane geometry. For example, a triangle with >> other than 180 degrees is not on a plane surface, nor are parallel lines >> that diverge or meet. please read the article and see what I mean! >> >> Euclid's geometry is about plane geometry and the non-Euclidean's are not. > > Euclid's 5th postulate can (and was) given as: > === > 5. If two lines are drawn which intersect a third in such a way that the > sum of the inner angles on one side is less than two right angles, then > the two lines inevitably must intersect each other on that side if > extended far enough. This postulate is equivalent to what is known as > the parallel postulate. (Wolfram) > === > > The domain of Euclidean geometry is the open Euclidean plane. > No actual infinity is involved, [1] > > Jan > > [1] You can extent Euclidean geometry by adding a 'point at infinity'. > This is called projective geometry, and it is something else. > (and also irrelevant for disproving general relativity) > > I think that "Relativity" with an interpretation that "L-principle of SR is light's speed is an E-spacial constant", that the Light-principle is an Einstein-spacial, everywhere local, constant, and that "Equivalence principle is up to terms, mass-energy equivalency in the E-spatial rotationally while Galilean linearly", then, first of all that otherwise there are various notions of what the principles of Relativity are, that the notions above are Einstein's theory of Relativity that he arrived at if not so much his first take or the usual mantras, the second, that infinity does get involved, because of all the higher-order moments, and it being about singular points, about 0, 1, and infinity. Why Einstein introduces two terms, "spacial" for SR and "spatial" for GR, is a thing, that most don't know there's a difference, and when things besides light are at rest, there isn't, yet, that's usually only an abstract situation. It's like if Einstein's idea about the clock face is that, "if all of a sudden, time stopped moving and I moved away, the clock face would also stop", and it's like, "well yeah, Einstein, that would mean time stopped". And it's like, "if I, Einstein, saw a women drop her glasses on the train, it would be an arc", it's like, "Einstein, you would see her as an arc, too". So, I think most people's thought experiments in relativistic dynamics, usually leave out properties of continuity, which has also that usual formalisms of geometry, often leave out a postulate of continuity, yet, it was kind of noticed to be necessary and since Hilbert it's sort of included. Is it Mach-ian? Einstein's later, greater theory, Relativity, has the L-principle and an EQ-principle, and separate E-spacial and E-spatial, and doesn't need much fixing, only rather the mathematics that Mathematics _owes_ Physics, of higher-order moments, to arrive at a fuller continuum mechanics, and very much so to arrive at though that light's speed c can be in natural units, "1", that c_g, gravity's, remains, "infinity". So, I think most people's developments with or against Relativity, have it that it's not what Einstein arrived at and maintains as his last word, as out of "Out of My Later Years". So, geometry has also a "postulate of continuity".