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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 .
The balance al-Khazini built for Sanjar's treasury was modeled after the balance al-Asfizari, who was a generation older than al-Khazini, built. [7] Sanjar's treasurer out of fear destroyed al-Asfizari's balance; he was filled with grief when he heard the news. [7] Al-Khazini called his balance "combined balance" to show honor towards Al ...
The most important of the works produced by the Banū Mūsā was the Kitāb maʻrifat masāḥat al-ashkāl al-basīṭah wa-al-kurīyah ("Book on the Measurement of Plane and Spherical Figures"), of which a commentary was made by the persian polymath Naṣīr al-Dīn al-Ṭūsī in the 13th century.
Ja'far bin Muhammad Al-Baqir (702–765) Muhammad and Ali's great great grand son, jurisprudence followed by Shia, he taught Malik ibn Anas (711–795) wrote Muwatta , jurisprudence from early Medina period now mostly followed by Sunni in Africa, Sunni Sufi and taught
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He worked under two Abbasid caliphs, al-Ma'mun and al-Mu'tasim. [3] Habash al-Hasib developed a trigonometric algorithm to solve problems related to parallax, which was later rediscovered by Johannes Kepler in 1609 and it is now known as Kepler's equation. [8] [9] Habash is the father of the astronomer Abu Ja'far ibn Habash. [3]
His edition was later updated by Ahmad ibn Abi Said al-Harawi (10th century). Later, Nasir al-Din al-Tusi (1201–1274) dismissed Al-Mahani and Al-Harawi's edition and wrote his own treatment of the Sphaerica, based on the works on Abu Nasr Mansur. Al-Tusi's edition became the most widely known edition of the Sphaerica in the Arabic-speaking world.
Yahya ibn Khalid (Arabic: يحيى بن خالد, romanized: Yahyā ibn Khālid; died 806 CE) was the most prominent member of the Barmakid family, serving as provincial governor and all-powerful long-time vizier to Caliph Harun al-Rashid before his abrupt fall in 803.