geometry
posted by
Superman
.
René Descartes is credited with?

geometry 
Ms. Sue
http://ualr.edu/lasmoller/descartes.html

geometry 
MathMate
Analytic geometry, (Cartesian coordinates).
"Je pense, donc je suis", in Latin, "Cogito ergo sum", or "I think, therefore I am."
and others.
See reference by Ms. Sue.