Ibrahim ibn Sinan (Arabic:Ibrāhīm ibn Sinān ibn Thābit ibn Qurra,ابراهيم بن سنان بن ثابت بن قرة; born 295 – 296 AH/c. 908 inBaghdad, died: 334-335 AH/946 in Baghdad, aged 38) was amathematician andastronomer who belonged to a family of scholars originally fromHarran in northernMesopotamia. He was the son ofSinan ibn Thabit (c. 880 – 943) and the grandson ofThābit ibn Qurra (c. 830 – 901).[1] Like his grandfather, he belonged to a religious sect ofstar worshippers known as theSabians of Harran.^[2]

Ibrahim ibn Sinan studiedgeometry, in particulartangents to circles. He made advances in thequadrature of theparabola and the theory ofintegration, generalizing the work ofArchimedes, which was unavailable at the time.^[1][3] Ibrahim ibn Sinan is often considered to be one of the most important mathematicians of his time.^[3]

• Roberts, Alexandre M. (2017). "Being a Sabian at Court in Tenth-Century Baghdad".Journal of the American Oriental Society.137 (2):253–277.doi:10.17613/M6GB8Z.
• Van Brummelen, Glen (2007)."Ibrāhīm ibn Sinān ibn Thābit ibn Qurra". In Hockey, Thomas; et al. (eds.).The Biographical Encyclopedia of Astronomers. New York: Springer. p. 574.doi:10.1007/978-0-387-30400-7_697.ISBN 978-0-387-31022-0. (PDF version)

• Rashed, Roshdi (1996).Les Mathématiques Infinitésimales du IXe au XIe Siècle1: Fondateurs et commentateurs: Banū Mūsā, Ibn Qurra, Ibn Sīnān, al-Khāzin, al-Qūhī, Ibn al-Samḥ, Ibn Hūd. London.{{cite book}}: CS1 maint: location missing publisher (link) Reviews: Seyyed Hossein Nasr (1998) inIsis89 (1) pp.112-113; Charles Burnett (1998) inBulletin of the School of Oriental and African Studies, University of London61 (2) p.406.
• Rashed, Roshdi (2008) [1970-80]."Ibrahim Ibn Sinan".Complete Dictionary of Scientific Biography.Encyclopedia.com.

• 900s births
• 946 deaths
• 10th-century Arab people
• 10th-century people from the Abbasid Caliphate
• 10th-century mathematicians
• 10th-century astronomers
• Medieval geometers
• People from Baghdad
• Mathematicians from the Abbasid Caliphate
• Astronomers from the Abbasid Caliphate
• Sabian scholars from the Abbasid Caliphate

• Articles with short description
• Short description matches Wikidata
• Articles with hCards
• Articles containing Arabic-language text
• CS1 maint: location missing publisher
• Year of birth uncertain