Abu Ja'far al-Khazin
Abu Jafar Muhammad ibn Husayn Khazin (Persian: ابوجعفر خازن خراسانی; 900–971), also called Al-Khazin, was an Iranian[1] Muslim astronomer and mathematician from Khorasan. He worked on both astronomy and number theory.
Al-Khazin | |
|---|---|
ابوجعفر خازن خراسانی | |
| Born | 900 |
| Died | 971 |
| Academic work | |
| Era | Islamic Golden Age |
| Main interests | Mathematics, astronomy |
Al-Khazin was one of the scientists brought to the court in Ray, Iran by the ruler of the Buyid dynasty, Adhad ad-Dowleh, who ruled from 949 to 983. In 959/960, Khazin was required by the vizier of Ray, who was appointed by ad-Dowleh, to measure the obliquity of the ecliptic.
One of Al-Khazin's works Zij al-Safa'ih ("Tables of the Disks of the Astrolabe") was described by his successors as the best work in the field and they make many references to it.[2] The work describes some astronomical instruments, in particular an astrolabe fitted with plates inscribed with tables, and a commentary on the use of these. A copy of this instrument was made, but it vanished in Germany during World War II. A photograph of this copy was taken and examined by the historian David King in 1980.[3]
Al-Khazin also wrote a commentary on the Roman polymath Ptolemy's Almagest in which he gives 19 propositions relating to statements by Ptolemy, and proposed a different model of the cosmos.[4]
References
edit- ^ Selin 1997, p. 275.
- ^ Dold-Samplonius 1981, p. 334.
- ^ King 2007.
- ^ O'Connor, John J.; Robertson, Edmund F. "Abu Jafar Muhammad ibn al-Hasan Al-Khazin". MacTutor. University of St Andrews. Retrieved 15 February 2023.
Sources
edit- Dold-Samplonius, Yvonne (1981). "Al-Khāzin, Abū Ja'far Muḥammad Ibn Al-Ḥasan Al-Khurāsānī". In Gillispie, Charles Coulston; Holmes, Frederic Lawrence (eds.). Dictionary of Scientific Biography. Vol. 7 & 8. New York: Scribner. OCLC 755137603.
- King, David A. (2007). "New Light on the Zīij al‐Safāa'ih of Abū Jacfar al‐Khāzin". Centaurus. 23 (2): 105–117. ISSN 0008-8994 – via Researchgate.
- Selin, Helaine (1997). Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Berlin; New York: Springer Nature. ISBN 978-1-4020-4960-6.
Further reading
edit- Calvo, Emilia (2007). "Khāzin: Abū Jaʿfar Muḥammad ibn al‐Ḥusayn al‐Khāzin al‐Khurāsānī". In Thomas Hockey (ed.). The Biographical Encyclopedia of Astronomers. New York: Springer. pp. 628–9. ISBN 978-0-387-31022-0. (PDF version)
- Pingree, David (1983). "Abū Jaʿfar Ḵāzen". Encyclopædia Iranica.
- Rashed, Roshdi (1996). Les Mathématiques Infinitésimales du IXe au XIe Siècle 1: Fondateurs et commentateurs: Banū Mūsā, Ibn Qurra, Ibn Sīnān, al-Khāzin, al-Qūhī, Ibn al-Samḥ, Ibn Hūd. London: Islamic Heritage Foundation. pp. 737–778, 779–833 (Texte et Traduction: Abū Ja‘far al-Khāzin, Transcrit du commentaire du premier livre de l’Almageste Min al-sharḥ li-al-maqāla al-ülā min al-Majisṭī). ISBN 1-873992-18-1.