Arithmetica

Arithmetica is a mathematical work, which was written in the third century AD by the Greek mathematician Diophantus of Alexandria. It is believed that it originally consisted of 13 books. However, today only six manuscripts have survived. These six books include a collection of 150 algebraic equations together with ( ad-hoc ) methods for finding a solution in each of these equations. These equations are now called Diophantine equations. Most problems in Arithmetica can be traced back to quadratic equations. These equations inspired Pierre de Fermat set up the Great Fermat's theorem, which states that it is for and, with no solution.