History of mathematics By Claconsma 70,000 BCE First geometrics paterns 20,000 BCE First number 1550 BCE First mathematics problems 628 First steps in algebra 1424 Discovery of pi number 1545 Idea of complex numbers 1637 Basis of analyses geometrics 1652 Roll theorem 1678 First woman Who did phd 1808 Raréfaction of primé numbers 1874 Countability of R 1901 LEBESGUE integration