A formula for PI is
PI / 4 = 1 - 1/3 + 1/5 - 1/7 +1/9 - 1/11 + ....
I played a bit with this formula and it took me approx. 4000 terms to get the first four decimals stable. Beautiful but not practical.
I would say that PI is female.
13-2016 Open letter to Open Source for You (OSFY)
6 months ago