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Pringles, the potato chip, have the classic saddle shape of anti-de Sitter space. They seem to be the perfect teaching example of anti-de Sitter space, but I've never heard Pringles used in examples. Is there a reason why Pringles arn't used in teaching anti-de Sitter space?

https://en.wikipedia.org/wiki/Anti-de_Sitter_space

Zamicol
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    I'm not certain pringles have the correct dimension for anti-de-sitter-space. –  Dec 02 '20 at 19:58
  • Because I doubt talking about Pringles will do much to help people understand the complicated mathematics involved in higher dimensional negatively curved Lorentzian manifolds. – K.defaoite Dec 03 '20 at 01:14

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A Pringle is likely closer to a hyperbolic paraboloid (saddle):

enter image description here

which is described by $z=ay^2-bt^2$.

Whereas, anti-deSitter space is an embedding of the form $y^2-t^2=-\alpha^2$, which is a "quasi-sphere". Both have negative curvature, but other than that they are different.

enter image description here

Alex R.
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