Template:Selected anniversaries/September 21: Difference between revisions

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||1884 – Dénes Kőnig, Hungarian mathematician and theorist (d. 1944)
||1884 – Dénes Kőnig, Hungarian mathematician and theorist (d. 1944)
||Elmer Tiling Cunningham (September 1, 1889 – June 14, 1965) was an American entrepreneur and businessman, specializing in vacuum tubes and radio manufacturing. He is best known for being the most successful business person to produce unlicensed counterfeit vacuum tubes. Pic tube.


||Joseph L. Walsh (b. September 21, 1895) was an American mathematician who worked mainly in the field of analysis. The Walsh function and the Walsh–Hadamard code are named after him. The Grace–Walsh–Szegő coincidence theorem is important in the study of the location of the zeros of multivariate polynomials. Pic.
||Joseph L. Walsh (b. September 21, 1895) was an American mathematician who worked mainly in the field of analysis. The Walsh function and the Walsh–Hadamard code are named after him. The Grace–Walsh–Szegő coincidence theorem is important in the study of the location of the zeros of multivariate polynomials. Pic.

Revision as of 07:52, 18 February 2018

  • 1576: Gerolamo Cardano dies. He was one of the most influential mathematicians of the Renaissance.

    1576: Gerolamo Cardano dies. He was one of the most influential mathematicians of the Renaissance.

  • 1577: Mathematician, cosmographer, and crime-fighter Pedro Nunes publishes new class of Gnomon algorithm functions based on navigation and cartography to detect and prevent crimes against mathematical constants at sea.

    1577: Mathematician, cosmographer, and crime-fighter Pedro Nunes publishes new class of Gnomon algorithm functions based on navigation and cartography to detect and prevent crimes against mathematical constants at sea.

  • 1792: French Revolution: The National Convention declares France a republic and abolishes the absolute monarchy.

    1792: French Revolution: The National Convention declares France a republic and abolishes the absolute monarchy.

  • 1853: Physicist and academic Heike Kamerlingh Onnes born. He will receive widespread recognition for his work, including the 1913 Nobel Prize in Physics for "his investigations on the properties of matter at low temperatures which led, inter alia, to the production of liquid helium".

    1853: Physicist and academic Heike Kamerlingh Onnes born. He will receive widespread recognition for his work, including the 1913 Nobel Prize in Physics for "his investigations on the properties of matter at low temperatures which led, inter alia, to the production of liquid helium".

  • 1854: Signed first edition of Leonardo Draws Clock Head sells fifty thousand dollars.

    1854: Signed first edition of Leonardo Draws Clock Head sells fifty thousand dollars.

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