firstname.lastname@example.org wrote: > Den fredagen den 2:e augusti 2013 kl. 12:49:31 UTC+2 skrev Richard Tobin:
>> >> You were claiming that pi is rational. It is not.
> > And it is because as you double up the vertices of a hexagon and get smooth round, the sum of side lengths / radius approach a limit. And that limit is a rational.
The limit of a sequence of rational numbers need not be a rational number.
-- Nam Nguyen in sci.logic in the thread 'Q on incompleteness proof' on 16/07/2013 at 02:16: "there can be such a group where informally it's impossible to know the truth value of the abelian expression Axy[x + y = y + x]".