Al-Abbās ibn Said al-Jawharī

From Wikipedia, the free encyclopedia
Jump to: navigation, search

Al-ʿAbbās ibn Saʿid al-Jawharī (c. 800 Baghdad? – c. 860 Baghdad?) was a geometer who worked at the House of Wisdom in Baghdad and for in a short time in Damascus where he made astronomical observations. He was probably of Iranian origin.[1] His most important work was his Commentary on Euclid's Elements which contained nearly 50 additional propositions and an attempted proof of the parallel postulate.


  1. ^ Selin, Helaine (2008). Encyclopaedia of the history of science, technology, and medicine in non-western cultures. Berlin New York: Springer. p. 129. ISBN 9781402049606. Probably of Iranian origin, al-˓Abbās Ibn Sa˓īd al-Jawharī was one of the court astronomers/astrologers of Caliph al-Ma˒mūn (r. 813–833) in charge of the construction of astronomical instruments. 
  • De Young, Gregg (1997). "Al-Jawhari's additions to Book V of Euclid's Elements". Zeitschrift für Geschichte der Arabisch-Islamischen Wissenschaften. 11 (10): 153–178. 
  • Hatipov, A. E.-A. (1964). "The theory of parallel lines in the medieval East". Trudy Samarkand. Gos. Univ. (N.S.) Vyp. (in Russian). 144: 5–47. 
  • Jaouiche, Khalil (1986). La théorie des parallèles en pays d’Islam: Contribution à la préhistoire des géométries non euclidiennes (in French). J. Vrin. ISBN 2-7116-0920-0. 
  • Rozenfeld, Boris Abramovich (1988). The History of Non-Euclidean Geometry: Evolution of the Concept of a Geometric Space. Springer. ISBN 0-387-96458-4. 

External links[edit]