From: mirifici on

Dear readers,

At my webpage:
http://domingogomez.web.officelive.com/brocotfraction.aspx

I have posed a challenge entitled "To PI or not to PI", it deals with
a generalized continued fraction (bifurcated fraction) whose
coeficients
are all the Stern-Brocot fractions, that is, all the positive
rational
numbers in their reduced forms.
This very special fractal fraction converges to a very specific value
close to PI.
I hope you find of some interest this challenge.

Best regards,

Domingo Gomez