Posted by: Alexandre Borovik | August 14, 2014

Fibonacci

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

x^3+2x^2+10x=20

as

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

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Responses

  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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