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Re: Inescapable (symmetric) twins paradox

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JanPB wrote on 10.08.2015 20:33:
> On Monday, August 10, 2015 at 11:24:13 AM UTC-7, Felipe Delgado wrote:
>> JanPB wrote:
>>> It's not only that, he writes a 4-tuple of symmetric tensor squares of
>>> covectors and equates it to g. This simply has no meaning unless he
>>> defines what this notation is supposed to mean exactly.
>>
>> Lol, good you say it. People might wrongfully assert you were a 
>> mathematician. 
>>
>> Come on, you are supposed to be at least a programmer, familiar with 
>> stuff, recipes and algorithms. No wonder Koobee Woblee bets you in math 
>> anywhere any time. You can't even read tensors equations, why am I talking 
>> to you.
> 
> Talk substance. Leave the poetry out. The point is that the notation:
> 
>     g = [-(cdt)², (dx)², (dy)², (dz)²] 
> 
> ...is nonsense. A metric is not a _quadruple_ of symmetric tensor powers,
> it's a _linear combination_ of them.

I am pretty sure that “dx”, “dy” and “dz” are _not_ tensors.  So how can
“(dx)²”, “(dy)²”, and “(dz)²” be “tensor powers”, let alone “symmetric”
ones?  And there is no interpretation in which “-(cdt)²” could be a
“(symmetric) tensor power” either, as the exponent is one of the expression
“cdt” only.

-- 
PointedEars

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Re: Inescapable (symmetric) twins paradox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-09 22:24 +0200
  Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-09 17:59 -0700
    Re: Inescapable (symmetric) twins paradox Felipe Delgado <fd@spreadspectrum.org> - 2015-08-10 18:24 +0000
      Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-10 11:33 -0700
        Re: Inescapable (symmetric) twins paradox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-19 22:16 +0200
          Re: Inescapable (symmetric) twins paradox Tom Roberts <tjroberts137@sbcglobal.net> - 2015-08-19 18:43 -0500
            Re: Inescapable (symmetric) twins paradox Odd Bodkin <bodkinodd@gmail.com> - 2015-08-24 09:52 -0500
            Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-08-25 00:01 -0700
              Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-25 00:05 -0700
                Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-08-25 00:29 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-25 11:16 -0700
                Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-08-25 22:36 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-25 23:06 -0700
                Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-08-26 00:19 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-26 10:54 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2015-08-26 20:32 +0200
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-26 15:58 -0700
              Re: Inescapable (symmetric) twins paradox Tom Roberts <tjroberts137@sbcglobal.net> - 2015-08-27 11:44 -0500
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-08-27 15:24 -0700
                Re: Inescapable (symmetric) twins paradox Tom Roberts <tjroberts137@sbcglobal.net> - 2015-08-27 22:15 -0500
                Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-08-27 23:49 -0700
                Re: Inescapable (symmetric) twins paradox Odd Bodkin <bodkinodd@gmail.com> - 2015-08-28 07:19 -0500
                Re: Inescapable (symmetric) twins paradox Tom Roberts <tjroberts137@sbcglobal.net> - 2015-08-28 09:55 -0500
                Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-08-28 16:52 -0700
                Re: Inescapable (symmetric) twins paradox kefischer <emoneyjoe@iglou.com> - 2015-08-28 20:49 -0400
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-28 21:45 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-09-07 11:13 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-07 12:21 -0700
                Re: Inescapable (symmetric) twins paradox "Lleyton H. Bellucci" <lleyb@stratospheree.org> - 2015-09-07 19:36 +0000
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-09-07 12:38 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-07 15:49 -0700
                Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-09-07 20:45 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-08 02:15 -0700
                Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-09-08 10:10 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-08 11:35 -0700
                Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-09-08 12:46 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-08 13:15 -0700
                Re: Inescapable (symmetric) twins paradox Maciej Woźniak <mlwozniak@wp.pl> - 2015-09-08 22:47 +0200
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-08 15:09 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-08 15:11 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-09-08 10:17 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-08 11:25 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-09-08 13:18 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-08 13:30 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-09-08 15:34 -0700
                Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-09-08 18:22 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-09-09 10:25 -0700
                Re: Inescapable (symmetric) twins paradox paparios <paparios@gmail.com> - 2015-09-09 10:54 -0700
                Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-09-09 12:40 -0700
          Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-20 22:24 -0700
            Re: Inescapable (symmetric) twins paradox kefischer <emoneyjoe@iglou.com> - 2015-08-21 02:44 -0400
            Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-08-20 23:58 -0700
            Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-08-21 08:14 -0700
    Re: Inescapable (symmetric) twins paradox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-19 22:10 +0200
  Re: Inescapable (symmetric) twins paradox Felipe Delgado <fd@spreadspectrum.org> - 2015-08-11 18:19 +0000

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