It’s not just about rabbits: Fibonacci’s Liber Abaci features merchants, profits, and balanced accounts
The Other Liber Abaci… Without the Fibonacci Sequence
In the 1228 manuscript preserved at the National Central Library in Florence, Leonardo Fibonacci does more than just do math: he teaches how to buy,...
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Fibonacci, the Merchant of Numbers: Economics and Commerce in the Liber Abaci
Leonardo Pisano, known as Fibonacci, was a key figure in medieval history and had deep ties to the Maritime Republic of Pisa and the art of commerce. During his stay in Bougie,...
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Michele Scoto, Frederick II and Fibonacci
The dialogue between science, court and knowledge in the thirteenth century
Frederick II and science
In the great cultural laboratory of thirteenth-century Europe, few names so powerfully evoke the dialogue between science, politics, and...
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The Liber Abaci returns home: the copy for legal deposit has been delivered to the National Central Library of Florence
Thursday, February 26, 2026, marked the closing of a circle that began on Wednesday, July 24, 2024: 582 days.
It was a hot July afternoon when, together with the publisher Imago, we had...
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Fibonacci vs. Everyone: Zero, Arabic Numerals, and the Sequence (Live, 55 Minutes)
Can math be fun?
The answer is yes… especially if we enter the world of Fibonacci and his Liber Abaci.
In 1228, Leonardo Pisano, known as Fibonacci, wrote a manuscript that was much more...
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Zero, zefiro, zephirum, ṣifr (صِفْر), śūnya (शून्य), kha, ṣifr
Or the number that didn't exist
“There are nine Roman numerals: 9, 8, 7, 6, 5, 4, 3, 2, 1.
Cum his et cum signo 0, quod arabice dicitur zephirum, quilibet numerus scribitur.”
“The nine...
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The Mateureka Museum welcomes the Liber Abbaci of Antiquus: a strong signal for collectors
On Friday, the Mateureka Museum—one of Europe's leading museums dedicated to the history of calculus and mathematics—chose to welcome our facsimile of Fibonacci's Liber Abbaci into its collection.
The thank you letter we...
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Fibonacci, the Accountant who Changed the History of Mathematics and Finance
When Andrea (Giovannetti) asked me to write an article about Fibonacci, my first thought was: "Domine, non sum dignus". While in the left hemisphere of the brain – the one dedicated to...
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Why reproduce the Liber Abaci in a limited edition today?
"I turned to a book as if to a person" — Tiromancino, lyrics by Franco Califano
It is an apparently very simple question, which nevertheless requires complex and profound answers, partly traceable only...
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Fibonacci, the Liber Abbaci and the Golden Ratio: between Mathematics, Nature and Spirituality
0 0, Zephyr, the number that did not exist. The Romans did not have the number "zero". It was the void they expressed with linguistic terms, for example non est, in accounting...
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