- French mathematician and philosopher. Considered the father of analytic geometry, he formulated the Cartesian system of coordinates. His philosophy is based on the rationalistic premise "I think, therefore I am.”笛卡尔，莱恩：(1596-1650) 法国数学家，哲学家，因将笛卡尔坐标体系公式化而被认为是解析几何之父。他的哲学思想基于唯理性的前提“我思故我在”