Leonardo of Pisa, also known as Fibonacci, was a
great mathematician
during the middle ages.
He was born in Pisa, Italy, about 1175 AD. He wrote the
book entitled "Liber abaci", which was completed in 1202. This
book described the use of arithmetic in the decimal system.
Fibonacci discovered the sequence of numbers that
later bears his name, the Fibonacci series. This series consists of
positive integers generated by adding successive members of this series. The
first few numbers of the series are as follows:
1, 1, 2, 3, 5,
8, 13, 21, 34, 55 ....
It has been shown that the Fibonacci series is
closely related to the golden ratio, and can be observed in a variety of
naturally occurring phenomena.
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