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The Golden Mean or Ratio[(1+sqrt(5))/2]
The Golden Mean or Ratio[(1+sqrt(5))/2]
The Golden Mean or Ratio[(1+sqrt(5))/2]
![The Golden Mean or Ratio[(1+sqrt(5))/2]](?q=https%3a%2f%2fwww.gutenberg.org%2fcache%2fepub%2f633%2fpg633.cover.small.jpg){kind=small}