Muhammad ibn Musa al-Khwarizmi
Muhammad ibn Musa al-Khwarizmi
Muhammad ibn Musa al-Khwarizmi (died ca. 850) was a Moslem mathematician, astronomer, and geographer and one of the most seminal scientific minds of early Islamic culture.
Al-Khwarizmi flourished at the court of the Abbasid caliph al-Mamun (reigned 813-833), whose interest in science and philosophy gave great impetus to scholarly investigation and to a copious translation movement from Greek via Syriac into Arabic. Very little is known of al-Khwarizmi's life, although his name indicates at least a family origin in the Persian culture of the Oxus River (Amu Darya) delta. He may have been attached to al-Mamun's scientific academy in Baghdad, the House of Wisdom (Arabic, Bayt al-Hikma), and it is probable that he participated in the calculation of the length of a degree of latitude, which took place during al-Mamun's reign.
To al-Khwarizmi we owe the world "algebra," from the title of his greatest mathematical work, Hisab al-Jabr wa-al-Muqabala (Calculation for Integration and Equation). The book, which was twice translated into Latin, by both Gerard of Cremona and Robert of Chester in the 12th century, works out several hundred simple quadratic equations by analysis as well as by geometrical example. It also has substantial sections on methods of dividing up inheritances and surveying plots of land. Al-Khwarizmi was one of the early popularizers in the Islamic world of the numeral system, which, along with the zero concept, is called Arabic in the West but which was borrowed at about this time from India. A technical term for the Arabic numerals, no longer much in use, is derived from the very name al-Khwarizmi: algorism.
Al-Khwarizmi also wrote a treatise on arithmetic which has survived only in a medieval Latin translation; Arabic bibliographies of the period mention two books by him on the astrolabe and one on sundials, although none of these seems to have come down to us. Al-Khwarizmi also compiled the first astronomical tables known in the Moslem world. They were translated into Latin, together with their lengthy introduction, by Adelard of Bath in 1126.
Of great importance also was al-Khwarizmi's contribution to medieval geography. His improvement upon Ptolemy's work is entitled Surat al-Ard (The Shape of the Earth). The text exists in a manuscript; the maps have unfortunately not been preserved, although modern scholars have been able to reconstruct them from al-Khwarizmi's descriptions.
The Hisab al-Jabr was translated into English with a useful biographical introduction and notes by Louis Charles Karpinski, Robert of Chester's Latin Translation of the Algebra of al-Khowarizmi (1915). Seyyed Hossein Nasr, Science and Civilization in Islam (1968), has extensive material on al-Khwarizmi. For the intellectual setting of his era see "The Time of al-Khwarizmi" in volume 1 of George Sarton, Introduction to the History of Science (3 vols. in 5, 1927-1948). □
"Muhammad ibn Musa al-Khwarizmi." Encyclopedia of World Biography. . Encyclopedia.com. (September 20, 2018). http://www.encyclopedia.com/history/encyclopedias-almanacs-transcripts-and-maps/muhammad-ibn-musa-al-khwarizmi
"Muhammad ibn Musa al-Khwarizmi." Encyclopedia of World Biography. . Retrieved September 20, 2018 from Encyclopedia.com: http://www.encyclopedia.com/history/encyclopedias-almanacs-transcripts-and-maps/muhammad-ibn-musa-al-khwarizmi
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
American Psychological Association
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.