Each problem that I solved became a rule, which served afterwards to solve other problems.
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About Ren Descartes
Ren Descartes was a 16th-century French philosopher. RenĂ© Descartes was a French philosopher, scientist, and mathematician, widely considered a seminal figure in the emergence of modern philosophy and science. Mathematics was paramount to his method of inquiry, and he connected the previously separate fields of geometry and algebra into analytic geometry. Read more on Wikipedia →