**(March 31, 1596 – February 11, 1650)**

Famous for the Cartesian coordinate system which was named in his honor, René Descartes was one of 17th century’s most influential intellectuals. His interests included philosophy, mathematics, science, religion and general rationalism. As a key player in the scientific revolution which emanated from the Italian Renaissance, Descartes worked in France, Netherlands and Sweden. He made lasting and decisive contributions to Coordinate Geometry. His analyses (alongside those of Pierre de Fermat and others), laid the foundation for Leibniz’s and Newton’s discovery of Calculus. He was extremely inventive: solving problems and devising theorems such as the Rule of Sign for Polynomial Roots. Apart from developing and using this Rule of Sign to ascertain the number of positive and negative roots of a polynomial, Descartes is considered the first European to fully understand algebra’s power as an abstracting tool. He is also believed to be the first person who designate x, y and z as the unknowns in equations, while denoting the knowns with a, b and c. As a consummate free thinker, he sought ways of applying philosophy to everything he studied. Some of his treatises indicate that he delved deeply into: medicine, metaphysics and theology. His profound acumens ensured that he became a pathfinder in optics, mechanics and astronomy: as evident by the roles which his works played in the advancement of science. Descartes was very influential in his lifetime and has remained so centuries afterwards. In addition to several *Cartesian* concepts, the asteroid *3587 Descartes* is named after him.

Hey there! Would you mind if I share your blog with my facebook group? There’s a lot of people that I think would really enjoy your content. Please let me know. Thanks.

It’s a fantastic paragraph.

Wonderful!

Great Summary! Wonderful inside and outside!

Outstanding!

“I think therefore I am.” – Rene Descartes

Saúde! Obrigado!

Descartes-The-Cartesian

Hi! Do you use Twitter? I’d like to follow you if that would be ok.

I’m definitely enjoying your blog and look forward

to new posts.

Hey, I am for the first time here. I found this board useful. Thank you.

Hello, I love your writings & blog.

Good job all the way!

Useful and helpful contents!

Wow! This could be the most beneficial blog we’ve come across on this subject. Excellent!

I’m a specialist in this topic therefore I can understand your hard work.

Thanks-a-mundo for the blog post.Really thank you! Really Cool.

Summarizing Descartes in one paragraph is not easy. Thanks for a job well done.

He built the road which many of us use now.

This weblog is nicely augmented with historic pictures.

I appreciate you for sharing this blog post. Thanks.

Much obliged