Re: how to generate pi in c

[Antonio Olivares]

--- On Mon, 11/8/10, Marko Vojinovic  wrote:
> From: Marko Vojinovic 
> Subject: Re: how to generate pi in c
> To: "Community support for Fedora users" 
> Date: Monday, November 8, 2010, 3:27 PM
> 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... ;-)

e^{i\pi} + 1 = 0

\pi = (\ln(-1)/i), but \ln(-1) does not exist? in the Real Numbers, and i = \sqrt(-1).

Interesting, indeed :)
> Best, :-)
> Marko
>
> --

Regards,

Antonio