History of Mathematics By kroonc Period: 100 to Aug 17, 2015 Old Mathematics Aug 17, 1250 Leonardo de Pisa (Fibonacci) More information Disseminated Arabic numerals throughout the western world Discovered Fibonacci sequence Aug 17, 1650 Descartes Information Developed Cartesian coordinate system Developed analytic geometry Aug 17, 1727 Isaac Newton More information Co-inventor of calculus Theory of gravity Aug 17, 1918 Cantor Information Foundations of number theory Set theory and notation Aug 17, 2015 Euler Information Defined natural logarithms and e Determined i (imaginary unit) and trig functions Mar 2, 2022 Brahmagupta Information Calculated roots, first to use zero Mar 2, 2022 Al-Khwarizmi Information Introduced Hindu-Arabic system Credited with beginnings of algebra