Darren New wrote:
> Actually, I was thinking of actual real space, where the same distances 
> are different depending who is measuring them. What's a circle for me 
> isn't a circle for you, so I find it hard to imagine a good definition 
> for "pi" under such circumstances.

Do you mean as in special relativity?  In such a case you'd probably 
have to define a circle under the Minkowski metric, in which case it 
won't look much like a circle.  I *think* that in such a case all 
circles end up having zero circumfrence, but I haven't actually worked 
out the math so there's a good chance I'm wrong here.

Agreed that a pi-like constant really only makes sense in Euclidean 
space though.

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