Russia. Muḥammad ibn Musu al-Khwarizmi Persian mathematician, astronomer, and geographer Illustrated Envelop

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Muḥammad ibn Musu al-Khwarizmi Persian mathematician, astronomer, and geographer

Illustrated Envelop

Description Muḥammad ibn Musu al-Khwarizmi (c. 780 – c. 850), formerly Latinized as Algoritmi, was a Persian scholar who produced works in mathematics, astronomy, and geography under the patronage of the Caliph Al-Ma’mun of the Abbasid Caliphate. Around 820 AD he was appointed as the astronomer and head of the library of the House of Wisdom in Baghdad.

 

Al-Khwarizmi’s popularizing treatise on algebra (The Compendious Book on Calculation by Completion and Balancing, ca. 813-833) presented the first systematic solution of linear and quadratic equations. One of his principal achievements in algebra was his demonstration of how to solve quadratic equations by completing the square, for which he provided geometric justifications. Because he was the first to treat algebra as an independent discipline and introduced the methods of “reduction” and “balancing” (the transposition of subtracted terms to the other side of an equation, that is, the cancellation of like terms on opposite sides of the equation), he has been described as the father or founder of algebra. His name gave rise to the terms Algorism and algorithm.

Type Illustrated Envelop
Condition: Good
Edges/Corners Fine
Used/Unused Not used
Published by/for: Ministry of Communications, 1983

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