The symbols we use - when were they created and by whom

Last Modified: Tue Dec 27 2016 11:33:41 GMT+0530 (India Standard Time)
  • 1360
    '+' symbol for addition introduced by Nicole Oresme - he wrote influential works on economics, mathematics, physics, astrology and astronomy, philosophy, and theology; was Bishop of Lisieux, a translator, a counselor of King Charles V of France, and probably one of the most original thinkers of 14th-century Europe
  • 1618
    'x' symbol for multiplication introduced by William Oughtred - he was an English mathematician and Anglican minister and credited as the inventor of the slide rule.
  • 1659
    '÷' symbol for addition introduced by Johann Rann.
  • 1655
    '∞' symbol for addition introduced by English mathematician John Wallis who is given partial credit for the development of infinitesimal calculus. Between 1643 and 1689 he served as chief cryptographer for Parliament and, later, the royal court.