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# What Did Rene Descartes Invent?

**Rene Descartes, the French philosopher and mathematician who invented the Cartesian coordinate system, is considered the father of modern analytical geometry.** His work was crucial to the discovery of infinitesimal calculus by Gottfried Liebniz and Isaac Newton.

In addition to his extraordinary contributions to mathematics, Descartes is probably best known to the general public for his famous philosophical proposition, "cogito ergo sum," meaning "I think, therefore I am." Much of Descartes philosophical work dealt with the question of how man can know whether he or anything else really exists. According to his famous argument, thinking about his own existence proves that he exists because there has to be someone there to do the thinking. This argument is so fundamental and familiar that philosophers often refer to it simply as "cogito."

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## What Are Some Interesting Facts About Rene Descartes?

A: French philosopher and mathematician Rene Descartes is behind many important concepts, from the Cartesian plane in mathematics to the "I think, therefore I... Full Answer >Filed Under: -
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## What Books Did Rene Descartes Write?

A: Descartes' works include "Musicae Compendium," "The World," "Man," "Dioptrics," "The Meteors," "Geometry," "Discourse on the Method," "The Meditations," "P... Full Answer >Filed Under: -
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## Who Was Pythagoras?

A: Pythagoras was a Greek philosopher and mathematician. He is best known for his contributions to mathematics, particularly the Pythagorean Theorem, and for ... Full Answer >Filed Under: -
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## Who Was Robert Hooke?

A: Robert Hooke was an English scientist, mathematician and philosopher who lived between 1635 and 1703. He is known for a variety of accomplishments in the s... Full Answer >Filed Under: