Biography:Ibn al-Ha'im al-Ishbili
Ibn al‐Hāʾim | |
---|---|
ابن الهائم} | |
Born | fl. c. 1213 Seville |
Academic work | |
Era | Islamic Golden Age |
Main interests | Mathematics, astronomy |
Notable works | al‐Zīj al‐kāmil fī al‐talim |
Abu Muhammad Abd al-Haqq al‐Ghafiqi al‐Ishbili (Arabic: ابن الهائم), also known as Ibn al‐Hāʾim (fl. c. 1213 was a medieval Muslim astronomer and mathematician from Seville.
He is known to modern scholars for his al‐Zīj al‐kāmil fī al‐talim (1204/5), which was had a great influence on the development of Islamic astronomy and which has provided important information on astronomers from Al-Andalus, including the instrument maker and astrologer Al-Zarqali.
Life
Ibn al‐Hāʾim originated from Seville in Al-Andalus. As a student, he learnt mathematics using the works of the scholars Al-Jayyani and Jabir ibn Aflah.[citation needed] He probably worked in North Africa, at a time when the Almohad Caliphate ruled the region. Ibn al‐Hāʾim became proficient at mathematics and was familiar with the trigonometrical concepts introduced into al‐Andalus by the scholar Ibn Mu'adh al-Jayyani in the 11th century and developed during the next century by the astronomer and mathematician Jābir ibn Aflaḥ.[1]
al‐Zīj al‐kāmil fī al‐talim
In 1204/5 Ibn al‐Hāʾim wrote al‐Zīj al‐kāmil fī al‐talim ("The Perfect Handbook on Mathematical Astronomy"), a treatise that consisted of an introduction and seven books. A zīj in all but name, the information it contains does not include any numerical tables.[1] It was considered exceptionally complete and accurate by Islamic medieval astronomers, and he had a great influence on the development of astronomy in the Maghreb.[2]
The work has provided modern historians with important information on earlier astronomers in al‐Andalus. It gives historical data on the life and works of the instrument maker and astrologer Al-Zarqali and the creation of the Tables of Toledo by astronomers in Toledo patronized by the qadi Said Al-Andalusi.
Ibn al‐Hāʾim further extended Al-Zarqali's theories on the oscillation of the obliquity of the ecliptic, presented spherical trigonometrical formulae, gives a longitude of the solar apogee of 85° 49′ and further confirmed the works of Al-Zarqali. The work also deals with the computation of the Moon's longitude and latitude, attempting to correct Ptolemy's theory.[1]
A copy of the manuscript is held at the Bodleian Library at Oxford, UK.[3]
Notes
- ↑ 1.0 1.1 1.2 Puig 2007, pp. 555–556.
- ↑ Samsó 1997, p. 405.
- ↑ "Al-Kāmil fī al-taʻlīm". Fihrist. https://www.fihrist.org.uk/catalog/work_5092.
Sources
- Puig, Roser (2007). "Ibn al‐Hāʾim: Abū Muḥammad ʿAbd al‐Ḥaqq al‐Ghāfiqī al‐Ishbīlī". in Thomas Hockey. The Biographical Encyclopedia of Astronomers. New York: Springer Publishers. ISBN 978-0-387-31022-0. http://islamsci.mcgill.ca/RASI/BEA/Ibn_al-Ha%27im_BEA.htm. (PDF version)
- Samsó, Julio (1997). "Ibn al‐Hāʾim". in Helaine Selin. Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Kluwer Academic Publishers. ISBN 9780792340669. https://books.google.com/books?id=raKRY3KQspsC&pg=PA405.
Further reading
- Samso, Julio (2013). "Ibn al‐Hāʾim". in Selin, Helaine. Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Berlin: Springer Nature. p. 405. ISBN 978-94017-1-416-7. https://books.google.com/books?id=GzjpCAAAQBAJ.
Original source: https://en.wikipedia.org/wiki/Ibn al-Ha'im al-Ishbili.
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