Fibonacci Day

11/23 is widely celebrated as Fibonacci Day.

The Fibonacci sequence is the sequence of integers 0, 1, 1, 2, 3, 5, 8, 13, 21,…  or 1, 1, 2, 3, 5, 8, 13, 21, …  It is a sequence of numbers that starts with 0 (or 1) and  each number is the sum of the previous two. The sequence first appeared in Liber Abaci (Book of Calculation), a book written in 1202 by Leonardo of Pisa, more popularly known as Fibonacci.

Fibonacci was born Leonardo Bonacci around 1170 A.D. in Tuscany, Italy. Fi bonacci literally means “son of Bonacci”. Fibonacci was the son of a very successful merchant/trader from Pisa and traveled often with his father to Algeria where it is said that he first showed his interest in mathematics and numbers. Until the end of the 1800’s several of his works were published under the names of Leonardo Bonacci di Pisa, Leonardo of Pisa, or Leonardo Pisano.




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