Fibonacci sequence

In mathematics, a sequence of numbers with surprisingly useful applications in botany and other natural sciences.

Beginning with two 1's, each new term is generated as the sum of the previous two: 1, 1, 2, 3, 5, 8, 13, . . . . The 13th-century mathematician Leonardo of Pisa (с 1170–after 1240), also known as Fibonacci, discovered the sequence but did not explore its uses, which have turned out to be wide and various. For example, the number of petals in most types of flowers and numbers involved in branching and seed-formation patterns come from the Fibonacci sequence. The ratio of any two successive terms approaches the value of the golden ratio as the terms become large.

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Universalium. 2010.

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  • Fibonacci numbers — /fee boh nah chee/, Math. the unending sequence 1, 1, 2, 3, 5, 8, 13, 21, 34, ... where each term is defined as the sum of its two predecessors. Also called Fibonacci sequence. [1890 95; after Leonardo Fibonacci, 13th century Italian… …   Universalium

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