Math History

1. Pythagoreans discover irrational numbers. 532 BC 2. Euclid writes Elements. 300 BC 3. Archimedes determines formulas for the area and volume of a sphere. 250 B.C. 4. Eratosthenes determines the circumferences of Earth. 235 B.C. 5. Appollonius studies conic sections. 225 B.C. 6. Al-Khowarizmi uses zero. 830 A.D. 7. Rudolff introduces the radical sign. 1525 A.D. 8. Tartaglia solves cubic equations. 1535 A.D. 9. Recorde introduces the equals sign. 1557 A.D. 10. Stevin introduces decimals. 1585 A.D. 11. Harriot introduces the inequality signs. 1610 A.D. 12. Napier invents …

…s “Analytical Engine.” 1842 A.D. 30. Riemann creates elliptic geometry. 1854 A.D. 31. Mobius strip is discovered. 1858 A.D. 32. Kovalevski is the first woman to earn a doctorate in mathematics. 1874 A.D. 33. Cantor creates transfinite numbers. 1895 A.D. 34. Whitehead and Russell write Principia Mathematica. 1910 A.D. 35. ENIAC is the first electronic computer invented. 1946 A.D. 36. Four-color map problem is solved. 1976 A.D. 37. Math student Marc Dovico is born. 1985 A.D. 38. Algebra II Books were copyrighted. 1998 A.D.