Article: Fibonacci, Leonardo Pisano

Fibonacci, Leonardo Pisano


Italian Number Theorist 1175 1240

Leonardo Pisano Fibonacci (c. 1175 c. 1240) is considered by many to be the greatest number theorist of the Middle Ages. The following sequence

1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144,
233, 377, 610, 987, 1597, 2584, 4181,

defined by F 1 = 1, F 2 = 1, and for n 3, F n = F n 1 + F n 2 is called the Fibonacci sequence in his honor. The Fibonacci sequence evolved from the following problem in Fibonacci's book Liber abbaci.

A certain man put a pair of rabbits in a place surrounded by a wall. How many pairs of rabbits can be produced from that pair in a year if it is supposed ...

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