Template:Selected anniversaries/December 9: Difference between revisions

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File:Dalton Trumbo prison 1950.jpg|link=Dalton Trumbo (nonfiction)|1905: Screenwriter and novelist [[Dalton Trumbo (nonfiction)|Dalton Trumbo]] born.
File:Dalton Trumbo prison 1950.jpg|link=Dalton Trumbo (nonfiction)|1905: Screenwriter and novelist [[Dalton Trumbo (nonfiction)|Dalton Trumbo]] born.
||Emanuel Sperner (b. 9 December 1905) was a German mathematician. He proposed Sperner's theorem, which says that the size of an antichain in the power set of an n-set (a Sperner family) is at most the middle binomial coefficient(s).


||1906 – Grace Hopper, American admiral and computer scientist, designed COBOL (d. 1992)
||1906 – Grace Hopper, American admiral and computer scientist, designed COBOL (d. 1992)

Revision as of 21:11, 1 February 2018