Re: how to generate pi in c

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On Monday, November 08, 2010 18:00:55 Bruno Wolff III wrote:
> > On Monday, November 08, 2010 04:49:33 Tim wrote:
> > > On Sat, 2010-11-06 at 17:13 +0100, Klaus-Peter Schrage wrote:
> > > > You are probably alle wrong - pi equals 3.125, see:
> > > > http://www.correctpi.com/
> > > 
> > > I was always under the impression that pi was merely the ratio of the
> > > circumference to the diameter, something that's easy enough to prove
> > > empirically (measure the two, and do the maths).
> 
> Just remember that depends on Euclidean Geometry. In other geometries (say
> very large circles on the surface of the earth) the ratio is different.

Ok, well, since this thread is already so far off-topic for a Fedora list, it 
won't hurt much to add a few more lines... :-)

The pi can actually be defined as a period of the exponential function, exp(z), 
in the imaginary direction. This is quite fundamental, and doesn't depend on 
any geometry definition whatsoever. Everything else can be considered a 
consequence, if you set up your axioms in a convenient way... ;-)

Best, :-)
Marko

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