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Back ليبر أباتشي Arabic Liber Abaci Catalan Кънига ищислѥниꙗ CU Liber Abaci Danish Liber Abaci Greek Liber Abaci Esperanto Liber abaci Spanish Liber abaci French Liber Abaci Galician ספר החשבונייה HE

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A page of the Liber Abaci from the National Central Library. The list on the right shows the numbers 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377 (the Fibonacci sequence). The 2, 8, and 9 resemble Arabic numerals more than Eastern Arabic numerals or Indian numerals.

The Liber Abaci or Liber Abbaci^[1] (Latin for "The Book of Calculation") was a 1202 Latin work on arithmetic by Leonardo of Pisa, posthumously known as Fibonacci. It is primarily famous for helping popularize Arabic numerals in Europe.

^ "Fibonacci's Liber Abaci (Book of Calculation)". The University of Utah. 13 December 2009. Retrieved 2018-11-27.

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