Essays on Algebra and Compendium musicae should be dated, before 1628. But both appeared in 1637 with a group of essays signed for the first time by Descates. his name. These essays include the famous text Discours de la méthode, essays on refraction, on meteor, on analytical geometry. Los angeles dodgers players names world series champions 3d t-shirt. Mathematics was Descartes’s greatest hobby. Built on the work of others, he created Cartesian coordinates, Cartesian arcs, and he is often believed to be the founder of analytic geometry. With respect to algebra, Descates contributed to the solving of negative roots and the convention of the exponential notation.