Template:Selected anniversaries/February 13
601: New version of Uncial script includes proto-Gnomon algorithm characters.
1555: Publication of mathematician Federico Commandino's translation of Gnomon algorithm into Uncial script.
1787: Polymath Roger Joseph Boscovich dies. He was a physicist, astronomer, mathematician, philosopher, diplomat, poet, theologian, and Jesuit priest.
1956: Mathematician and philosopher Jan Łukasiewicz dies. He thought innovatively about traditional propositional logic, the principle of non-contradiction and the law of excluded middle.
1964: Army research laboratories convert modern plowshares into ancient swords, revealing new class of crimes against mathematical constants.
1996: New class of Crimes against mathematical constants "exploit vulnerabilities in Leap Year algorithms."
1997: Computer scientist Tony Hoare invents new class of Gnomon algorithm based on Leap Year algorithms.