Mathematicians By kladner 500 BCE Pythagoras Created the Pythagorean Theorem 300 BCE Elucid Period: 1170 to 1250 Fibonacci Period: 1623 to 1662 Blaise Pascal 1642 Pascal Invented the first calculator Period: 1643 to 1727 Isaac Newton Period: 1646 to 1716 Gottfried Leibniz Period: 1759 to 1823 William Playfair
