Template:Selected anniversaries/November 13
1705: Mathematician, philosopher, and crime-fighter Gottfried Wilhelm Leibniz publishes new class of Gnomon algorithm functions which detect and prevent crimes against mathematical constants.
1841: Surgeon and gentleman scientist James Braid first sees a demonstration of animal magnetism, which leads to his study of the subject he eventually calls hypnotism.
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).
1969: Actor Gerard Butler born.
2014: Mathematician and theorist Alexander Grothendieck dies. He was the leading figure in the creation of modern algebraic geometry.
2017: Action-adventure film London Has Swollen opens to rave reviews.