Replacing the Roman numeral system, its ancient Egyptian multiplication method, and using an abacus for calculations, with a Hindu-Arabic numeral system was an advance in making business calculations easier and faster, which assisted the growth of banking and accounting in Europe. In a 1228 copy of the manuscript, the first section introduces the Hindu-Arabic numeral system and compares the system with other systems, such as Roman numerals, and methods to convert the other numeral systems into Hindu-Arabic numerals. The original 1202 manuscript is not known to exist. The book was well-received throughout educated Europe and had a profound impact on European thought. The book showed the practical use and value of the new Hindu-Arabic numeral system by applying the numerals to commercial bookkeeping, converting weights and measures, calculation of interest, money-changing, and other applications. The manuscript book advocated numeration with the digits 0–9 and place value.

In the Liber Abaci (1202), Fibonacci introduced the so-called modus Indorum (method of the Indians), today known as the Hindu–Arabic numeral system. He also introduced Europe to the sequence of Fibonacci numbers, which he used as an example in Liber Abaci.Ī page of Fibonacci's Liber Abaci from the Biblioteca Nazionale di Firenze showing (in box on right) the Fibonacci sequence with the position in the sequence labeled with Latin numbers and Roman numerals and the value in Hindu-Arabic numerals.

However, even earlier in 1506 a notary of the Holy Roman Empire, Perizolo mentions Leonardo as 'Lionardo Fibonacci'.įibonacci popularized the Hindu–Arabic numeral system in the Western world primarily through his composition in 1202 of Liber Abaci ( Book of Calculation).

The name he is commonly called, Fibonacci, was made up in 1838 by the Franco-Italian historian Guillaume Libri and is short for filius Bonacci ('son of Bonacci'). 1240–50), also known as Leonardo Bonacci, Leonardo of Pisa, or Leonardo Bigollo Pisano ('Leonardo the Traveller from Pisa'), was an Italian mathematician from the Republic of Pisa, considered to be 'the most talented Western mathematician of the Middle Ages'.

Popularizing the Hindu–Arabic numeral system in Europeįibonacci ( also c.

Liber Abaci Di Fibonacci