The Fibonacci Series is a sequence of numbers first created by Leonardo Fibonacci (fi-bo-na-chee) in 1202. It is a deceptively simple series, but its ramifications and applications are nearly limitless. It has fascinated and perplexed mathematicians for over 700 years, and nearly everyone who has worked with it has added a new piece to the Fibonacci puzzle, a new tidbit of information about the series and how it works. Fibonacci mathematics is a constantly expanding branch of number theory, with more and more people being drawn into the complex subtleties of Fibonacci's legacy.

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An Introduction to the Series (In Action)
The Rabbit Problem (Proof)
Binet's Formula (In Action)
The Successor Fomula (In Action)
Binomial Form
Fibonacci Spiral

The Golden Rectangle
The Golden Ratio (Proof)
The Golden Spiral

Fibonacci Ratios (In Action)
Binet Revisited (Proof)
One Over Eighty-nine (Proof)
Nature
Leonardo da Vinci

Leonardo Fibonacci
Édouard Lucas
Jacques Binet
Jordanus Nemorarius