![]() ![]() The Liber abaci famously begins with Leonardo's introduction of the "nine Indian figures," 9, 8, 7, 6, 5, 4, 3, 2, and 1. The pages below show demonstration problems involving computations with fractions: ![]() , 377, now known as the “Fibonacci sequence.” Sigler’s translation of this problem and solution is found on page 404 of his book. ![]() On the pages below is Leonardo’s famous rabbit problem with its solution given in the column of numbers on the far right: 1, 2, 3, 5, 8. A complete English language translation of Liber abaci was compiled and published by Laurence E. These works became a major force in introducing and bringing about the European adoption of this new number system and mathematics. Impressed by this new knowledge, he returned to Pisa where he disseminated it by writing Liber abaci ( Book of Calculation) in 1202. From them, he learned of the “Hindu-Arabic” numerals and their computing algorithms as used in business transactions. As a young man attending to his family’s trade in Africa, he studied mathematics from Islamic teachers. Leonardo of Pisa (ca.1180-1241), more commonly known as Fibonacci (Son of Bonacci), was an Italian merchant who spent his youth in North Africa.
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