Template:Selected anniversaries/December 21: Difference between revisions

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||1968: Apollo program: Apollo 8 is launched from the Kennedy Space Center, placing its crew on a lunar trajectory for the first visit to another celestial body by humans.
||1968: Apollo program: Apollo 8 is launched from the Kennedy Space Center, placing its crew on a lunar trajectory for the first visit to another celestial body by humans.
File:Voronoi-diagram-color-commentators.jpg|link=Fantasy Voronoi diagram|1974: [[Fantasy Voronoi diagram]] upstages [[Fantasy football (American) (nonfiction)|Fantasy Football]].
File:Chronography of 354 title and dedication.png|link=Chronography of 354 (nonfiction)|1976: [[Chronography of 354 (nonfiction)|Chronography of 354]] wins Pulitzer Prize.


||1980: Vladimir Potapov dies ... He worked on the theory of J-contractive matrix functions, the analysis of matrix functions, and interpolation problems. mathematician. Pic search: https://www.google.com/search?q=vladimir+potapov+mathematician
||1980: Vladimir Potapov dies ... He worked on the theory of J-contractive matrix functions, the analysis of matrix functions, and interpolation problems. mathematician. Pic search: https://www.google.com/search?q=vladimir+potapov+mathematician
File:Mandelbrot set command line depiction.png|link=Mandelbrot set (nonfiction)|1984: [[Mandelbrot set (nonfiction)|Mandelbrot set]] develops [[Artificial intelligence (nonfiction)|artificial intelligence]], discovers new class of [[Gnomon algorithm functions]].


||1988: A bomb explodes on board Pan Am Flight 103 over Lockerbie, Dumfries and Galloway, Scotland, killing 270.
||1988: A bomb explodes on board Pan Am Flight 103 over Lockerbie, Dumfries and Galloway, Scotland, killing 270.
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||2016: Sidney David Drell dies ... theoretical physicist and arms control expert. Pic search: https://www.google.com/search?q=Sidney+David+Drell
||2016: Sidney David Drell dies ... theoretical physicist and arms control expert. Pic search: https://www.google.com/search?q=Sidney+David+Drell


File:Traveller.jpg|link=Traveler|2016: ''[[Traveler ]]'' voted Picture of the Day by the citizens of New Minneapolis, Canada.


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Latest revision as of 17:28, 7 February 2022

  • 1807: Mathematician Joseph Fourier announced to the French Academy of Science that an arbitrary function could be expanded as an infinite series of sines and cosines (now known as the Fourier series).

    1807: Mathematician Joseph Fourier announced to the French Academy of Science that an arbitrary function could be expanded as an infinite series of sines and cosines (now known as the Fourier series).

  • 1878: Mathematician and philosopher Jan Łukasiewicz born. He will think innovatively about traditional propositional logic, the principle of non-contradiction and the law of excluded middle.

    1878: Mathematician and philosopher Jan Łukasiewicz born. He will think innovatively about traditional propositional logic, the principle of non-contradiction and the law of excluded middle.

  • 1913: Arthur Wynne's "word-cross", the first crossword puzzle, is published in the New York World.

    1913: Arthur Wynne's "word-cross", the first crossword puzzle, is published in the New York World.

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