Proof That An Infinite Dimensional Universe May Not Exist

  • Context: Graduate 
  • Thread starter Thread starter waht
  • Start date Start date
  • Tags Tags
    Dimensions
Click For Summary

Discussion Overview

The discussion revolves around the concept of an infinite dimensional universe and whether mathematical properties of shapes in higher dimensions, such as hyperspheres, can provide insights into the existence of such a universe. Participants explore the implications of surface area behavior in higher dimensions, particularly in relation to the geometry of the universe.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that the surface area of a hypersphere reaches a maximum in the 7th dimension and diverges to 0 in higher dimensions, suggesting this might imply an infinite dimensional universe cannot exist.
  • Another participant challenges this by stating that a spherical universe with infinite dimensions would have a surface area of 0, possibly due to lacking a surface altogether.
  • Discussion includes the surface area behavior of other hyper-shapes, with one participant mentioning the hyper-cube and its area diverging as dimensions increase.
  • A participant raises the question of the hypertorus, expressing difficulty in finding information about its surface area in relation to dimensions, despite its relevance in discussions about the shape of the universe.
  • One participant asserts that mathematics can only validate specific models of physics, not make definitive statements about physical reality itself.

Areas of Agreement / Disagreement

Participants express differing views on the implications of mathematical properties of shapes in higher dimensions for the existence of an infinite dimensional universe. There is no consensus on whether the mathematical observations support or refute the idea of such a universe.

Contextual Notes

Limitations include the lack of comprehensive understanding of surface areas for various hyper-shapes in higher dimensions and the dependence on specific mathematical models to draw conclusions about physical reality.

waht
Messages
1,502
Reaction score
4
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.

http://mathworld.wolfram.com/Hypersphere.html
 
Physics news on Phys.org
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:
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.
 
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:
Mathematics cannot prove anything about physics- it can only prove statements about particular models for physics- perhaps that a particular model is not valid.
 

Similar threads

  • · Replies 13 ·
Replies
13
Views
3K
  • · Replies 0 ·
Replies
0
Views
4K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 25 ·
Replies
25
Views
4K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 13 ·
Replies
13
Views
5K
  • · Replies 1 ·
Replies
1
Views
4K
Replies
3
Views
3K
  • · Replies 32 ·
2
Replies
32
Views
6K