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Births on September 21

1884Sep, 21

Dénes Kőnig

Dénes Kőnig, Hungarian mathematician and theorist (d. 1944)
Dénes Kőnig (September 21, 1884 – October 19, 1944) was a Hungarian mathematician of Jewish heritage who worked in and wrote the first textbook on the field of graph theory.

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Events on 1884

  • 27Mar

    Cincinnati riots of 1884

    A mob in Cincinnati, Ohio, attacks members of a jury which had returned a verdict of manslaughter in what was seen as a clear case of murder; over the next few days the mob would riot and eventually destroy the courthouse.
  • 20Apr

    Humanum genus

    Pope Leo XIII publishes the encyclical Humanum genus.
  • 14Oct

    Photographic film

    American inventor George Eastman receives a U.S. Government patent on his new paper-strip photographic film.
  • 22Oct

    Prime meridian (Greenwich)

    The Royal Observatory in Britain is adopted as the prime meridian of longitude by the International Meridian Conference.
  • 10Dec

    Adventures of Huckleberry Finn

    Mark Twain's Adventures of Huckleberry Finn is published.