« In A sense, Khwarizmi is more entitled to be called « the father of algebra » than Diophantus because Khwarizmi is the first to teach algebra in an elementary form and for its own sake, Diophantus is primarily concerned with the theory of numbers. » Con l’applicazione mobile “AgenziaEntrate”, https://www.colegioenlinea.edu.co/profile/guerrerolfgdalgaard57417/profile