Al-Jabr

9th-century Arabic work on algebra

Al-Jabr, also known as The Compendious Book on Calculation by Completion and Balancing, is an Arabic mathematical treatise on algebra written in Baghdad around 820 by the Persian polymath Al-Khwarizmi. It was a landmark work in the history of mathematics, with its title being the ultimate etymology of the word "algebra" itself, later borrowed into Medieval Latin as algebrāica.

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