Influence of Fibonacci's Liber Abaci

Timeline

1. 1202–1210Pisa · PisaFibonacci learned the Indian-Arabic numeral system while trading in North Africa; after returning to Pisa, he wrote Liber Abaci in Latin, systematically introducing place-value notation, arithmetic, fractions, and algebra, and dedicated it to the Holy Roman Emperor.
2. 1215Mediterranean trading cities · MediterraneanIn the 1210s, manuscripts of Liber Abaci circulated among merchants, accountants, and scholars in the Italian city-states; Indian-Arabic numerals were gradually adopted for bookkeeping and trade calculations, significantly improving computational efficiency over Roman numerals.
3. 1215–1220Europe · EuropeThe book introduced the sequence 1,1,2,3,5,8… through the example of rabbit breeding, later known as the Fibonacci sequence; although its place-value notation had not yet fully replaced Roman numerals in the 13th century, it laid the methodological foundation for the modernization of European mathematics.