Step Into the Babel Nexus Public Domain Library — 814 Unique Works, 53 Galleries, Free

A visual library where you explore classic books and ideas by clicking through connected rooms.

Loading the Index

Fibonacci — Liber Abaci

1202 · Book · Public Domain

Fibonacci's "Liber Abaci" is a 13th-century mathematical treatise on arithmetic and algebra. It was instrumental in introducing the Hindu-Arabic numeral system to Europe.

Sources for Fibonacci — Liber Abaci