Wrote Liber Abaci in 1202- helped popularize Hindu-Arabic numeral system and Egyptian multiplication system we still use today
Wrote of Fibonacci Sequence/Numbers- every number is the sum of the previous two numbers
Fibonacci spirals appear frequently in nature
Leonardo Bonacci Born: c. 1170-75 Pisa Died: c. 1240-50 most likely Pisa Also Known as: Leonardo Bigollo Leonardo Pisano Fibonacci
About Leonardo Bonacci, known to most simply as Fibonacci, was an Italian mathematician known best for popularizing the Hindu-Arabic numeral system in Europe, and for his writings on Fibonacci numbers, rectangles, and spirals. Born in Pisa to Guglielmo Bonacci, a wealthy Italian merchant and diplomat, between 1170 and 1175, Leonardo was educated in North Africa where his father worked. He traveled frequently along the Mediterranean coast; it was here where he learned about the Hindu-Arabic system, which uses the digits 0-9 and a system of place values. In 1202, Bonacci wrote Liber Abaci. This was the book that introduced Europe to the Hindu-Arabic system, as well as the Fibonacci sequence. Leonardo Bonacci died after being granted a salary by the Republic of Pisa between 1240 and 1250, most likely in Pisa.
Known For: Fibonacci sequence/numbers Fibonacci spiral Liber Abaci Popularizing Arabic-Hindu numerical system in Europe
Fibonacci Sequence In the Fibonacci sequence, each number is the sum of the two preceding numbers. Begin the sequence with {1, 1, 2...} {1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233}