Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Infinitie dimensions?

  1. Mar 7, 2005 #1
    here is an interesting link at mathworld that describes a hypersphere and the formula for determining the surface area of a sphere in higher dimensions. If you look at the graph, the maximum area is in 7th dimension and diverges to 0 for higher dimensions.

    Although some people speculate the universe might have infinite dimensions, could this be proof that an infinite dimensional universe may not exist.

  2. jcsd
  3. Mar 16, 2005 #2
    No, just that a spherical universe with infinite dimensions has surface area 0 (probably because it wouldn't have a surface).

    That's interesting, though. Does a surface area max occur with other hyper-shapes, as n approaches infinity?
    Last edited: Mar 16, 2005
  4. Mar 17, 2005 #3
    Apart from the hyper-sphere and the hyper-cube (area = 2n, which ofcourse diverges for n going to infinity) I think there are not really a lot of shapes that can be intuitively generalised to an arbitrary number of dimensions.
  5. Mar 17, 2005 #4
    What about the hypertorus?

    Mathworld outputs no results and Google isn't much help either. That's too bad... isn't it supposed to be one of the leadings candidates for the shape of the universe?

    I know Kaku mentions the hypertorus in "Hyperspace," but I'm not sure he mentioned anything about the surface area in relation to n.

    Oh, for those using Mac OS X, I found a http://www.versiontracker.com/dyn/moreinfo/macosx/20105 of a rotating 4D Torus. Trippy!
    Last edited by a moderator: Apr 21, 2017
  6. Mar 17, 2005 #5


    User Avatar
    Science Advisor

    Mathematics cannot prove anything about physics- it can only prove statements about particular models for physics- perhaps that a particular model is not valid.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook