Fibonacci's sequence enters European mathematics
1221
Scholars across Italy began studying the rabbit-breeding problem from Leonardo of Pisa's Liber Abaci, in which each generation's count followed a pattern of additive growth. Merchants adopted his Hindu-Arabic numerals for their ledgers. The sequence itself would surface in the spirals of pinecones, sunflower heads, and Renaissance architecture long before anyone understood why nature so persistently favored it.
In context
Also in 1221 (3 other events on record)
- Mongols destroy Merv and Nishapur · Central Asia · War
- Genghis Khan defeats Jalal al-Din at the Indus · South Asia · War
- Dominic de Guzman dies in Bologna · Europe · Religion
Before and after in Europe
Before and after in Science
Era
High Middle Ages (1000–1300), one of 1,306 events from that era on Saeculum.