Professor at the University of Sciences and Technologies Lille I in Lille, France, and scholar at the Laboratoire Paul Painlevé, UMR 8524 (Centre National de la Recherche Scientifique and Lille I University, France). The article was published originally as Ahmed Djebbar, "On Mathematical Activities in North Africa since the 9th Century. First part: Mathematics in Medieval Maghrib", AMUCHMA Newsletter (Newsletter of the Commission on the History of Mathematics in Africa, published by Universidade Pedagógica in Maputo, Mozambique), No. 5, September 1995; online at: http://www.math.buffalo.edu/mad/AMU/amu_chma_15.html#3. In the present version, copy editing, images and captions were added, as well as a thorough update of the bibliography, by www.MuslimHeritage.com (Mohammed Abattouy, Chief Editor).