Posted by: Alexandre Borovik | August 14, 2014


It appears that Fibonacci was the first person in Europe to represent a real number in a place value system: he wrote a root of the equation



1^{\circ} 26^{\prime} 7^{\prime\prime}  42^{\prime\prime\prime} .


  1. Meaning base 60? I.e., 1 + \frac{26}{60} + \frac{7}{60^2} + \frac{42}{60^3} + \ldots?

  2. Yes, base 60, of course.

  3. And it is not true, although widely believed, that Fibonacci’s daughter was called Bunny.

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