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Leonardo Pisano Fibonacci or more commonly known as Fibonacci was born in Pisa Italy in 1175 He was the son of Guilielmo Bonacci a secretary of the Republic of Pisa His father was only a secretary so he was often sent to do work in Pisan trading colonies He did this for many years until 1192 In 1192 his dad got a permanent job as the director of the Pisan trading colony in Bugia Algeria Sometime after 1192 Bonacci brought Fibonacci with him to Bugia Bonnaci expected Fibonacci to become a merchant and so arranged for him in instruction of calculation techniques One of the major themes in this involved the Hindu-Arabic numerals which had not yet been introduced into Europe Eventually Bonacci enlisted his sons help in carrying out business for the Pisan republic and sent him on trips to Egypt Syria Greece Sicily and Provence Fibonacci took this grand opportunity offered by his father to study and learn the mathematical techniques in use in these various regions Around 1200 Fibonacci returned to Pisa where for at least the next twenty-five years he worked on his own mathematical compositions Fibonacci produced his most famous book Liber abaci the book of the Calculator The book consisted of four parts and was revised by him a quarter of a century later in 1228 It was a thorough article on algebraic methods and problems which strongly emphasized and advocated the introduction of the Indo-Arabic numeral system comprising the figures one to nine and the innovation of the zephirum the figure zero Dealing with operations in whole numbers systematically he also proposed the idea of the bar solidus for fractions and went on to develop rules for converting fraction factors into the sum of unit factors At the end of the first part of the book he presented tables for multiplication prime numbers and factor numbers In the second part he demonstrated mathematical applications to commercial transactions
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