« 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. » Bent u op zoek http://www.bioguiden.se/redirect.aspx?url=https://nl.wikipedia.org/wiki/Kwaliteit