Wheres kansas Wheres kansas 38th Triangle Spring Sale April 28-29, 2017 Heart Of Oklahoma Expo Center – Shawnee, Okla scientific calculator John von Neumann 1903 – 1957 scientific calculator Ludwig Boltzmann 1844 – 1906 Archimedes 287 – 212 BC Rene Descartes 1596 – 1650 https://en.wikipedia.org/wiki/Calculator Galileo Galilei 1564 – 1642 Albert Einstein 1879 – 1955 Andrey Markov 1856 – 1922 Terence Chi-Shen Tao *1975 Isaac Newton 1642 – 1726 https://en.wikipedia.org/wiki/Scientific_notation Evangelista Torricelli 1608 – 1647 Ludwig Boltzmann 1844 – 1906 Carl F. Gauss 1777 – 1855 Andrey Markov 1856 – 1922 David Hilbert 1862 – 1943 ln(exp(pi / 7)) Marie-Sophie Germain 1776 – 1831 Euclid 300 BC Marie-Sophie Germain 1776 – 1831 Lorenzo Avogadro 1776 – 1856