Re: Where did the 3 geometric dimensions come from?

Subject	Re: Where did the 3 geometric dimensions come from?
Newsgroups	sci.physics
References	<dp8natFrm3hU1@mid.individual.net>
From	Sam Wormley <swormley1@gmail.com>
Date	2016-05-08 08:03 -0500
Message-ID	<zO2dndPb2amupLLKnZ2dnUU7-RGdnZ2d@giganews.com> (permalink)

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On 5/8/16 6:47 AM, 7 wrote:
> Where did the 3 geometric dimensions come from?

   One might say that the three spatial dimensions where created in the
   big bang... and that of course begs the question, where there three
   spatial dimensions in the environment in which the big bang occurred.


   Here is a reason there are only four dimensions in our universe.
   Tegmark: On the dimensionality of spacetime
 > http://space.mit.edu/home/tegmark/dimensions.pdf

 > Abstract.

 > Some superstring theories have more than one effective low-energy
 > limit corresponding to classical spacetimes with different
 > dimensionalities. We argue that all but the (3 + 1)-dimensional one
 > might correspond to ‘dead worlds’, devoid of observers, in which case
 > all such ensemble theories would actually predict that we should find
 > ourselves inhabiting a (3 + 1)-dimensional spacetime. With more or
 > less than one time dimension, the partial differential equations of
 > nature would lack the hyperbolicity property that enables observers
 > to make predictions. In a space with more than three dimensions,
 > there can be no traditional atoms and perhaps no stable structures. A
 > space with less than three dimensions allows no gravitational force
 > and may be too simple and barren to contain observers.

-- 

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Thread

Where did the 3 geometric dimensions come from? 7 <7@enemygadgets.com> - 2016-05-08 11:47 +0000
  Re: Where did the 3 geometric dimensions come from? Poutnik <poutnik4nntp@gmail.com> - 2016-05-08 13:58 +0200
    Re: Where did the 3 geometric dimensions come from? 7 <7@enemygadgets.com> - 2016-05-08 13:15 +0000
      Re: Where did the 3 geometric dimensions come from? Poutnik <poutnik4nntp@gmail.com> - 2016-05-08 15:23 +0200
        Re: Where did the 3 geometric dimensions come from? 7 <7@enemygadgets.com> - 2016-05-08 13:47 +0000
          Re: Where did the 3 geometric dimensions come from? Poutnik <poutnik4nntp@gmail.com> - 2016-05-08 15:55 +0200
            Re: Where did the 3 geometric dimensions come from? 7 <7@enemygadgets.com> - 2016-05-08 15:36 +0000
              Re: Where did the 3 geometric dimensions come from? john <johnsefton288@gmail.com> - 2016-05-08 08:42 -0700
  Re: Where did the 3 geometric dimensions come from? Sam Wormley <swormley1@gmail.com> - 2016-05-08 08:03 -0500
    Re: Where did the 3 geometric dimensions come from? 7 <7@enemygadgets.com> - 2016-05-08 13:25 +0000
      Re: Where did the 3 geometric dimensions come from? Sam Wormley <swormley1@gmail.com> - 2016-05-08 12:47 -0500
        Re: Where did the 3 geometric dimensions come from? john <johnsefton288@gmail.com> - 2016-05-08 11:28 -0700
        Re: Where did the 3 geometric dimensions come from? 7 <7@enemygadgets.com> - 2016-05-08 20:33 +0000
          Re: Where did the 3 geometric dimensions come from? john <johnsefton288@gmail.com> - 2016-05-08 18:32 -0700
            Re: Where did the 3 geometric dimensions come from? HVAC <mr.hvac@gmail.com> - 2016-05-08 19:08 -0700
              Re: Where did the 3 geometric dimensions come from? john <johnsefton288@gmail.com> - 2016-05-08 19:14 -0700
                Re: Where did the 3 geometric dimensions come from? HVAC <mr.hvac@gmail.com> - 2016-05-09 04:39 -0700
                Re: Where did the 3 geometric dimensions come from? john <johnsefton288@gmail.com> - 2016-05-09 04:51 -0700
                Re: Where did the 3 geometric dimensions come from? HVAC <mr.hvac@gmail.com> - 2016-05-09 05:10 -0700
                Re: Where did the 3 geometric dimensions come from? john <johnsefton288@gmail.com> - 2016-05-09 05:41 -0700
                Re: Where did the 3 geometric dimensions come from? HVAC <mr.hvac@gmail.com> - 2016-05-09 05:57 -0700
                Re: Where did the 3 geometric dimensions come from? benj <nobodyxx@gmail> - 2016-05-09 12:04 -0400
                Re: Where did the 3 geometric dimensions come from? benj <nobodyxx@gmail> - 2016-05-09 11:56 -0400
                Re: Where did the 3 geometric dimensions come from? HVAC <mr.hvac@gmail.com> - 2016-05-09 09:29 -0700
                Re: Where did the 3 geometric dimensions come from? benj <nobodyxx@gmail> - 2016-05-09 14:30 -0400
                Re: Where did the 3 geometric dimensions come from? benj <nobodyxx@gmail> - 2016-05-09 12:02 -0400
                Re: Where did the 3 geometric dimensions come from? Odd Bodkin <bodkinodd@gmail.com> - 2016-05-09 11:11 -0500
            Re: Where did the 3 geometric dimensions come from? Odd Bodkin <bodkinodd@gmail.com> - 2016-05-09 11:09 -0500
    Re: Where did the 3 geometric dimensions come from? "nuny@bid.nes" <Alien8752@gmail.com> - 2016-05-08 11:51 -0700
      Re: Where did the 3 geometric dimensions come from? Sam Wormley <swormley1@gmail.com> - 2016-05-08 13:52 -0500
        Re: Where did the 3 geometric dimensions come from? "nuny@bid.nes" <Alien8752@gmail.com> - 2016-05-08 23:17 -0700
          Re: Where did the 3 geometric dimensions come from? Sam Wormley <swormley1@gmail.com> - 2016-05-09 08:33 -0500

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