What do pine cones and numbers have in common? A 13th-century Italian mathematician named Leonardo of Pisa. Better known by his pen name, Fibonacci, he came up with a number sequence that keeps ...

This string of numbers is the Lucas sequence, honoring the 19th-century French mathematician Édouard Lucas (1842–1891), who studied the Fibonacci sequence (and gave it its name).

Fibonacci attached no great significance to the sequence, and it was generally ignored through the years by all but dedicated mathematicians.

You're probably familiar with Fibonacci series of numbers, first analyzed in a published manuscript by the 13th-century mathematician Leonardo, son of Fibonacci of Pisa (in what is now Italy). The ...

To carry out their calculations, merchants in the early 13th century used an abacus or a system called finger reckoning. Commerce changed when Leonardo of Pisa — known today as Fibonacci ...

In 1202 Leonardo da Pisa (aka Fibonacci) taught Western Europe how to do arithmetic with Arabic numerals. In Man of Numbers: Fibonacci's Arithmetic Revolution, Keith Devlin describes how basic ...

If you use a number pair later in the series to get a fairly precise ratio between these numbers by dividing a Fibonacci number by the next number in the series you would get approximately 1.618 ...

The numbers 1, 1, 2, 3, 5, 8, 13, 21, 34, and 55 belong to a famous sequence named for the Italian mathematician Fibonacci, who lived more than 700 years ago.

This spruce cone displays a marked fibonacci number sequence. The sequence, thought up by 13th-century Italian mathematician Leonardo of Pisa, pen name Fibonacci, plays out in plants, from pine ...