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Re: Inescapable (symmetric) twins paradox

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wobbly wrote:

> JanPB wrote:
> 
>> On Saturday, August 1, 2015 at 11:48:00 AM UTC-7, wobbly wrote:
>>> JanPB wrote:
>>> 
>>> > This is very basic, it simply follows from the general formula for
>>> > arc length which is sqrt(g_ij qdot^i qdot^j) dt when the coordinates
>>> > ARE standard inertial, i.e. g = -c^2 dt^2 + dx^2 + dy^2 + dz^2
>>> 
>>> Is this the same as
>>> 
>>>     g = [-(cdt)², (dx)², (dy)², (dz)²]
>> 
>> I don't know what you wrote on the right-hand side. It's not correct
>> mathematics,
>> so if it's some private notation that you use, explain it first.
> 
> Are you serious, not familiar with vector notation of the same?
> https://en.wikipedia.org/wiki/Vector_notation
> 
>>> Why don't you say so. What is g anyway, arc length? On which circle?
>> 
>> Not on circle (what an idea!). g is the Minkowski metric coefficients
>> given with respect to some noninertial coordinates (like those of the
>> travelling twin).
> 
> I don't understand a word of what you say. That must be a STERADIAN, not
> an arc.

I should rather say, a surface delimited by a steradian.

> I must insist, having an arc without a circle defies all laws of
> Nature.
> https://en.wikipedia.org/wiki/Arc_%28geometry%29
> 
> Please remark the detailed figure on right side.

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Re: Inescapable (symmetric) twins paradox "Julio Di Egidio" <julio@diegidio.name> - 2015-07-23 14:49 +0100
  Re: Inescapable (symmetric) twins paradox "Dono," <sa_ge@comcast.net> - 2015-07-23 06:54 -0700
  Re: Inescapable (symmetric) twins paradox rotchm <rotchm@gmail.com> - 2015-07-23 07:24 -0700
    Stephane Baune puffs himself up "Dono," <sa_ge@comcast.net> - 2015-07-23 07:31 -0700
      Re: Stephane Baune puffs himself up "Dono," <sa_ge@comcast.net> - 2015-07-23 10:35 -0700
      Re: Stephane Baune puffs himself up and proves himself  a severely delusional POS "Dono," <sa_ge@comcast.net> - 2015-07-23 11:12 -0700
  Re: Inescapable (symmetric) twins paradox Sylvia Else <sylvia@not.at.this.address> - 2015-07-24 11:44 +1000
  Re: Inescapable (symmetric) twins paradox Tom Roberts <tjroberts137@sbcglobal.net> - 2015-07-23 22:00 -0500
    Re: Inescapable (symmetric) twins paradox paparios <paparios@gmail.com> - 2015-07-24 04:50 -0700
    Re: Inescapable (symmetric) twins paradox alsor@interia.pl - 2015-07-25 08:34 -0700
      Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-07-25 09:06 -0700
    Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-07-25 09:04 -0700
      Re: Inescapable (symmetric) twins paradox Tom Roberts <tjroberts137@sbcglobal.net> - 2015-07-27 16:40 -0500
      Re: Inescapable (symmetric) twins paradox rotchm <rotchm@gmail.com> - 2015-07-27 14:42 -0700
        Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-07-27 14:58 -0700
          Re: Inescapable (symmetric) twins paradox rotchm <rotchm@gmail.com> - 2015-07-27 16:25 -0700
          Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-07-28 14:08 -0700
      Re: Inescapable (symmetric) twins paradox wobbly <wobbly@dont-email.me> - 2015-07-29 19:26 +0000
        Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-07-29 12:47 -0700
          Re: Inescapable (symmetric) twins paradox wobbly <wobbly@dont-email.me> - 2015-07-29 20:08 +0000
            Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-07-29 13:42 -0700
        Re: Inescapable (symmetric) twins paradox "Dono," <sa_ge@comcast.net> - 2015-07-29 12:59 -0700
          Re: Inescapable (symmetric) twins paradox wobbly <wobbly@dont-email.me> - 2015-07-29 20:10 +0000
      Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-01 22:21 -0700
        Re: Inescapable (symmetric) twins paradox wobbly <wobbly@dont-email.me> - 2015-08-02 10:53 +0000
          Re: Inescapable (symmetric) twins paradox wobbly <wobbly@dont-email.me> - 2015-08-02 11:00 +0000
          Re: Inescapable (symmetric) twins paradox JanPB <filmart@gmail.com> - 2015-08-02 21:07 -0700
            Re: Inescapable (symmetric) twins paradox Bohuš Matuška <bohu@paranetnet.net> - 2015-08-03 15:11 +0000
    Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-07-25 22:57 -0700
    Re: Inescapable (symmetric) twins paradox Koobee Wublee <koobee.wublee@gmail.com> - 2015-07-25 22:57 -0700
      Re: Inescapable (symmetric) twins paradox Odd Bodkin <bodkinodd@gmail.com> - 2015-07-27 09:49 -0500

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