Ancient Arabic manuscript. Extract from Tanqih al-Manazir, written by Kamal al-Din al-Farisi (1267-1319). Kamal al-Din Hasan ibn Ali ibn Hasan al-Fari

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Ancient Arabic manuscript. Extract from Tanqih al-Manazir, written by Kamal al-Din al-Farisi (1267-1319). Kamal al-Din Hasan ibn Ali ibn Hasan al-Farisi, or Abu Hasan Muhammad ibn Hasan, was a prominent Persian scientist born in Tabriz, Iran. He is best known for giving the first mathematically satisfactory explanation of the rainbow and a number of important contributions to number theory. His most notable being on amicable numbers. Farisi was a pupil of the great astronomer and mathematician Qutb al-Din al-Shirazi, who in turn was a pupil of Nasir al-Din Tusi.

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Photo credit: © Arabic manuscripts collection/NEW YORK PUBLIC LIBRARY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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