The following sections of this BookRags Literature Study Guide is offprint from Gale's For Students Series: Presenting Analysis, Context, and Criticism on Commonly Studied Works: Introduction, Author Biography, Plot Summary, Characters, Themes, Style, Historical Context, Critical Overview, Criticism and Critical Essays, Media Adaptations, Topics for Further Study, Compare & Contrast, What Do I Read Next?, For Further Study, and Sources.
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The following sections, if they exist, are offprint from Beacham's Guide to Literature for Young Adults: "About the Author", "Overview", "Setting", "Literary Qualities", "Social Sensitivity", "Topics for Discussion", "Ideas for Reports and Papers". (c)1994-2005, by Walton Beacham.
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1256-1321
Arab mathematician and astronomer who was the first to treat a fraction as a ratio of two numbers, and the first to use the term almanac (al-manakh, or "weather," in Arabic) for a book of astronomical data. Al-Banna, who spent most of his career in Morocco, wrote some 82 books on a number of subjects, including an algebraic treatise and an introduction to the Elements of Euclid (c. 325-c. 250 B.C.). His most important mathematical writings were Talkhis amal al-hisab (Summary of arithmetical operations), and Raf al-hijab, a commentary on the Talkhis.