Template:Selected anniversaries/December 16
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1653: Oliver Cromwell becomes Lord Protector of the Commonwealth of England, Scotland and Ireland.
- Radon's theorem that d + 2 points in d dimensions may always be partitioned into two subsets with intersecting convex hulls. Pic.
1887: Polymath and crime-fighter Francis Galton publishes new class of Gnomon algorithm functions which detect and prevent crimes against mathematical constants.
1947: William Shockley, John Bardeen and Walter Brattain build the first practical point-contact transistor.
1968: Jekyll, the "fragrance for sociopaths", announces record sales.