book in Ramadan 708 H.E. (Feb-Mar 1309 A.D.). The autograph manuscript of this work has newly discovered. Before the discovery, the completion date of the Tanqih had been controversial, placed from sometime before 1290 (M. Nazif) to after 1302, but before Quṭb al-Dīn Shīrāzī's death in 710/1311 (Wiedemann). Tadhkira al-ahbab fi bayan al-tahabb (Memorandum for friends on the proof of amicability) Al-Basa'ir fi 'ilm al-manazir (Insights Into the Sciences of Optics), a text book for students of optics, presenting the conclusion of the Tanqih without the proofs or experiments. He completed the writing of this book in 708 H.E. (1309 A.D.). See also List of Iranian scientists and scholars Notes Further reading A.G. Agargün and C.R. Fletcher, "al-Farisi and the Fundamental Theorem of Arithmetic", Historia Mathematica, 21 (1994), 162–173. M. Naẓīf, al-Ḥasan b. al-Hayṯam, 2 vols., Cairo, 1942–43. Roshdi Rashed, The Development of Arabic Mathematics: Between Arithmetic and Algebra (London, 1994). Roshdi Rashed, Entre arithmétique et algèbre: Recherches sur l'histoire des mathématiques arabes (Paris, 1984). Roshdi Rashed, "Materials for the Study of the History of Amicable Numbers and Combinatorial Analysis (Arabic)", J. Hist. Arabic Sci., 6 (1982), 278–209. Roshdi Rashed, "Nombres amiables, parties aliquotes et nombres figurés aux XIIIème et XIVème siècles", Archive for History of Exact Sciences, 28 (1983), 107–147. Roshdi Rashed, "Le modèle de la sphère transparente et l'explication de l'arc-en-ciel : Ibn al-Haytham – al-Farisi", Revue d'histoire des sciences, 22 (1970), 109–140. Moustafa Mawaldi, l' Algèbre de Kamal al-Din al-Farisi, présentée par Moustafa Mawaldi sous la direction de Monsieur le Professeur Roshdi Rashed. 1989, Université de la Sorbonne Nouvelle, Paris. Nader El-Bizri, 'Ibn al-Haytham et le problème de la couleur', Oriens-Occidens: Cahiers du centre d'histoire des sciences et des philosophies arabes et médiévales, C.N.R.S. 7 (2009), 201–226. Nader El-Bizri, 'Grosseteste's Meteorological Optics: Explications of the Phenomenon of the Rainbow after Ibn al-Haytham', in Robert Grosseteste and the Pursuit of Religious and Scientific Knowledge in the Middle Ages, eds. J. Cunningham and M. Hocknull (Dordrecht: Springer, 2016), 21-39 E. Wiedemann, "Eine Zeichnung des Auges, Zentralblatt für Augenheilkunde, 34 (1910). Tanqīḥ al-manāẓer, MS Istanbul, Topkapı Kütüphanesi, Ahmet III 3340 (copied at Nīšāpūr, 15 Šaʿbān 716/1316) ed. as Ketāb Tanqīḥ al-manāẓer le-ḏawī al-abṣār wa’l-baṣāʾer, 2 vols, Hyderabad (Deccan), 1347–48/1928–30 (this edition did not use the Topkapı manuscript and contains errors in both text and diagrams). External links 1260 births 1319 deaths 13th-century Iranian mathematicians 14th-century Iranian mathematicians Number theorists Medieval