
[Illustration: An astronomer calculates the position of a star with an armillary sphere and a quadrant in this illustration from a 16th-century Ottoman manuscript, ART ARCHIVE /UNIVERSITY LIBRARY ISTANBUL /DAGLI ORTI]
[Note: The current issue of “ARAMCO World” has a long and well illustrated article on the history of the sciences in the islamic World. This is written by Richard Covington, an author based in Paris.]
Like astronomy, which evolved from the practical necessities of finding the directions and hours for prayers, Islamic mathematics was very much a hands-on affair at the beginning, a product of the marketplace and of the need for pragmatic legal precedents. Both algebra and the use of zero had the same end in mind—streamlining computations for business deals. Al-Khwarizmi had a hand in the development of both.
In his Kitab al-jabr (Book of Algebra)— the word comes from the Arabic word jabara, “to restoreâ€â€”the Baghdad mathematician spells out his no-nonsense intent: “It’s a summary encompassing the finest and most noble operations for calculations which men may require for inheritances and donations, for shares and judgments, for commerce and all sorts of transactions that they have among them such as surveying tracts of land, digging canals and other aspects and techniques.†Continue reading Islam by the Numbers






