@article{3157375, title = "Practicing algebra in late antiquity: The problem-solving of Diophantus of Alexandria", author = "Christianidis, Jean and Oaks, Jeffrey", journal = "Historia Mathematica", year = "2013", volume = "40", number = "2", pages = "127-163", publisher = "ACADEMIC PRESS INC ELSEVIER SCIENCE", issn = "0315-0860, 1090-249X", doi = "10.1016/j.hm.2012.09.001", keywords = "Diophantus; Algebra", abstract = "Medieval algebra is distinguished from other arithmetical problem-solving techniques by its structure and technical vocabulary. In an algebraic solution one or several unknowns are named, and via operations on the unknowns the problem is transferred to the artificial setting of an equation expressed in terms of the named powers, which is then simplified and solved. In this article we examine Diophantus’ Arithmetica from this perspective. We find that indeed Diophantus’ method matches medieval algebra in both vocabulary and structure. Just as we see in medieval Arabic and Italian algebra, Diophantus worked out the operations expressed in the enunciation of a problem prior to setting up a polynomial equation. Further, his polynomials were regarded as aggregations with no operations present. (c) 2012 Elsevier Inc. All rights reserved." }