Keywords: Diophantus, Arithmetica, Vaticanus graecus 191.jpg Arithmetica in ms Biblioteca Apostolica Vaticana Vaticanus graecus 191 fol 388v Diophantos von Alexandria Arithmetica in der Handschrift Biblioteca Apostolica Vaticana Codex Vaticanus graecus 191 fol 388v 1296 2d copy Diophantus other versions PD-Art 13th-century manuscripts Diophantus Arithmetica |