**(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 contributions to Coordinate Geometry. His analyses (alongside those of Pierre de Fermat and others), laid the foundation for Newton’s and Leibniz’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 utilizing 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 evidenced 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. Alongside *Cartesian* concepts, the *3587 Descartes* asteroid and 48-kilometer-wide *Descartes* lunar crater are dedicated to him.

__All rights reserved. © Valentine Oduenyi__

i must say you have high quality posts here.

Really good post – precise and superb.

Hey! Descartes was awesome. What a great research you did.

I agree with this post and all the comments made about it.

Hi everybߋdy, this is my n⁵ visit here; and I can say this blog has awesomе materials.

Descartes was awesome. It takes great intellect to excel in science and arts.

I bookmarked the site earlier, now I’m back for more.

Whether science or philosophy, Descartes is the man. Period!

I have read this last year, and still enjoying it again now.

I’ve loaded your blog on different browsers and it is always fast. I appreciate it.

C’est un très bon résumé.

Awesome! He excelled in several fields.

Great, everything is great here.

Like!! Great article post. Really thank you! Really Cool.

Kudos!

Hey, you did a great job.

Using this website has been my pleasure. I agree with your selections.

Want more…

My ideal weblog. Sapaviva is seamless in both style and contents.

Descartes flame is still bright

Really appreciate his works

Has all the essentials.