Phi frac 1 sqrt 5 2 July 8, 2019 16 32 64 128 Phi frac 1 sqrt 5 2 approx 1.618 Frac 1+ sqrt 5 2 2 1+ 5 Phi = (1 + sqrt(5))/2 Frac 5 pi 6 $ frac 1 2 $
