Descartes was very influential in the field of geometry. In 1637, he published his work<em> La Géométrie</em> as an appendix to<em> Discours de la méthode</em> (Discourse on the Method). This work was the first to propose combining algebra and geometry into a single subject. The result was an algebraic geometry called analytic geometry. This contributed to the ideas of Leibniz and Newton and was important in the development of calculus.
