Practicing Algebra in Late Antiquity: The Problem-Solving of Diophantus of Alexandria (2013)
Christianidis, Jean P. (Author)
Oaks, Jeffrey A. (Author)
Historia Mathematica
Volume: 40, no. 2
Issue: 2
Pages: 127-163
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.
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