Ideas about how a world with more than three spatial dimensions would work - what laws of physics would be needed, how things would be built, how people would do things and so on.


Postby PatrickPowers » Thu Mar 16, 2023 5:08 am

Ed Witten says the (approximate) 1/d^2 rule of gravity in general relativity comes directly out of there being three spatial dimensions. So we could expect in N D that the rule is 1/d^(N-1).
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Re: Gravity

Postby New Kid on the 4D analog of a Block » Fri Mar 17, 2023 2:45 am

They were discussing this before, or sometimes just assuming it. In fact, you were involved in the first discussion, although it was five years ago.
You made the interesting point that even in 3D, not all forces obey an inverse-power law.
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