Al-Jabr wa’l-Muqābalah: Algebra as Rule-Governed Problem Solving and Algorithmic Transformation
Al-Jabr wa’l-Muqābalah: Algebra as Rule-Governed Problem Solving examines how early algebra organized mathematical problems through restoration, balancing, classification, transformation, demonstration, and practical calculation before modern symbolic notation. This article introduces al-jabr, al-muqābalah, al-Khwārizmī’s algebraic tradition, rhetorical algebra, unknown quantities, equation types, word problems, completing the square, geometric demonstration, algebraic correctness, practical mathematics, transmission, and the procedural roots of computational reasoning. It explains why algebra should be understood not only as symbolic manipulation, but as a disciplined method for representing unknowns, classifying cases, applying valid operations, preserving relations, reaching solvable forms, and checking results. By connecting early algebra with algorithmic thought, the article frames al-jabr wa’l-muqābalah as a major historical example of rule-governed problem solving: a human procedure for turning uncertainty into structured mathematical action across teaching, law, commerce, surveying, astronomy, and later computation within enduring mathematical and institutional traditions.









