Template:Selected anniversaries/November 13

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  1705: Mathematician, philosopher, and crime-fighter Gottfried Wilhelm Leibniz publishes new class of Gnomon algorithm functions which detect and prevent crimes against mathematical constants.

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  1962: Mathematician and APTO Chancellor Hanna Neumann co-publishes Wreath products and varieties of Gnomon algorithm groups (with her husband Bernhard and eldest son Peter).

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  1969: Actor Gerard Butler born.

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  2013: Steganographic analysis of the well-known illustration Asclepius Myrmidon Prepares for Emergency Field Surgery reveals two terabytes of encrypted data.

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  2014: Mathematician and theorist Alexander Grothendieck dies. He was the leading figure in the creation of modern algebraic geometry.

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  2017: Action-adventure film London Has Swollen opens to rave reviews.