Stephen wrote:
>
> What about xyz = the ratio of any circle's circumference to its diameter?
>
The main problem here is that xyz is not a constant, but is rather a
function. In spherical and hyperbolic spaces it can be defined as a
function of the radius so you need to say something like:
xyz(r) = the ratio of the circumference to the diameter of a circle of
radius r
If your space doesn't have a constant curvature, then it's a function of
yet more parameters.
The main issue isn't only that pi has a pre-existing meaning, it's that
the value in these non-euclidean spaces isn't even a constant.
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