Template:Selected anniversaries/September 24
1054: Composer, mathematician, and astronomer Hermann of Reichenau dies. He wrote a treatise on the science of music, several works on geometry and arithmetic, and astronomical treatises (including instructions for the construction of an astrolabe, at the time a very novel device in Western Europe).
1501: Gerolamo Cardano born. He will be one of the most influential mathematicians of the Renaissance.
1624: Renaissance-era mechanical soldier Clock Head uses Gnomon algorithm functions to fight crimes against mathematical constants.
1625: Mathematician and politician Johan de Witt born. He will derive the basic properties of quadratic forms, an important step in the field of linear algebra.
1769: Polymath and crime-fighter Johann Heinrich Lambert discovers new type of Gnomon algorithm functions which convert map projections into optical projections. Lambert will use these projections to expose art thieves and math burglars working for the House of Malevecchio.
1934: Writer and peace activist John Brunner born.
1937: Alice Beta Paragliding published. Many experts believe that the illustration depicts Beta infiltrating the ENIAC program.
1938: Mathematician Lev Schnirelmann dies. He proved that any natural number greater than 1 can be written as the sum of not more than C prime numbers, where C is an effectively computable constant.
1999: Writer, editor, and actor George Plimpton publishes his account of personally committing math crimes "for the participatory journalistic experience."
2016: Spiral 2 voted Picture of the day by the citizens of New Minneapolis, Canada.