Title: The Shimmer of AlMāridinī in the Explanation of the Treatise by alYāsamīn
Description
 The mathematical tradition that flourished in North Africa and Andalusia during the Middle Ages did not undergo the same decline that many scholars claim occurred in the sciences after the first half of the 13th century. The present work supports this point. The manuscript is a very elegant copy of a mathematical text by Badr alDīn Muḥammad ibn Muḥammad ibn alĠazal, best known as Sibṭ alMāridīnī ("the son of alMāridīnī’s daughter") from the name of his famous maternal grandfather, who was himself a mathematician. Sibṭ alMāridīnī's mathematical knowledge—acquired during his extensive years of study and during his activity as muwaqqit (timekeeper) at the AlAzhar Mosque in Cairo—is applied here to the verses of a late 12th century mathematical poem composed by the Maghrebi mathematician alYāsamīn. The copyist of the manuscript drew a clear graphical distinction between the text of alYāsamīn's poem and alMāridīnī's commentary: the verses of the former are highlighted in red ink, while the latter runs for 11 folio pages, in which is found a definition of the elements of algebra known at the time (number, root and sequence); the description of the six canonical equations already identified by alḪwārizmī during the 9th century; and a treatment of the algebraic operations of restoration, comparison, and multiplication and division of monomials.
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اللمعة الماردينية في شرح الياسمينية
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Physical Description
 12 leaves (19 lines), bound : paper ; 23 x 17 centimeters
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