Biographical Encyclopedia of Astronomers

2014 Edition
| Editors: Thomas Hockey, Virginia Trimble, Thomas R. Williams, Katherine Bracher, Richard A. Jarrell, Jordan D. MarchéII, JoAnn Palmeri, Daniel W. E. Green

Sijzī: Abū Sa ҁīd Aḥmad ibn Muḥammad ibnҁAbd al-Jalīl al-Sijzī

  • Glen Van Brummelen
Reference work entry

BornSijistān, (Iran), circa945


Sijzī, well known for his contributions to geometry, was also a prolific astrologer and astronomer. We possess few details of his life; his name suggests that he was born in Sijistān. His father, Abū al-Ḥūsayn Muḥammad ibn ҁAbd al-Jalīl, was also a mathematician and astronomer. Parts of Sijzī’s life were spent in Sijistān and Khurāsān. In Shīrāz in 969/970, he was present (with  Kūhī,  Būzjānī, and others) for the famous observations of meridian transits of the Sun conducted by  ҁAbd al-Raḥmān al- Ṣūfī. Later in life he became a friend of  Bīrūnī, who often quoted Sijzī’s results in his own works.

Of approximately 20 astrological and astronomical treatises composed by Sijzī, many were compilations and summaries of the works of others, enhanced and systematized by the addition of tables and commentary. His Jāmiҁal-Shāhī contains 13 astrological works, three of which are summaries of treatises by Abū Ma ҁ shar. One of these, the Muntakhab...

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Selected References

  1. Berggren, J. L. (1981). “Al-Sijzī on the Transversal Figure.” Journal for the History of Arabic Science 5: 23–36.MathSciNetGoogle Scholar
  2. — (1991). “Medieval Islamic Methods for Drawing Azimuth Circles on the Astrolabe.” Centaurus 34: 309–344.Google Scholar
  3. Dold-Samplonius, Yvonne (1997). “Al-Sijzī.” In Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures, edited by Helaine Selin, pp. 898–900. Dordrecht: Kluwer Academic Publishers.Google Scholar
  4. Frank, Josef (1918/1919). “Zur Geschichte des Astrolabs.” Sitzungsberichte der Physikalisch-Medizinischen Sozietät in Erlangen 50–51: 275–305.Google Scholar
  5. Hogendijk, Jan P. (English trans. and annot.) and Mohammad Bagheri (Arabic ed. and Persian trans.) (1996). Al-Sijzī’s Treatise on Geometrical Problem Solving. Tehran: Fatemi.Google Scholar
  6. Kennedy, E. S. (1976). The Exhaustive Treatise on Shadows by Abū al-Rayhān Muhammad b. Ahmad al-Bīrūnī. Translation and commentary. 2 Vols. Aleppo: Institute for the History of Arabic Science.MATHGoogle Scholar
  7. Kennedy, E. S. and B. L. van der Waerden (1963). “The World-Year of the Persians.” Journal of the American Oriental Society 83: 315–327.CrossRefGoogle Scholar
  8. Pingree, David (1968). The Thousands of Abu Maҁshar. London: Warburg Institute.Google Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Glen Van Brummelen
    • 1
  1. 1.Quest UniversitySquamishCanada