Template:Selected anniversaries/August 15
1864: Mathematician and crime-fighter James Joseph Sylvester combines matrix theory, invariant theory, number theory, partition theory, and combinatorics with Gnomon algorithm functions, resulting in a new method of detecting and preventing crimes against mathematical constants.
1891: Signed first edition of Alice Beta and Niles Cartouchian Play Chess sells for ninety thousand dollars at charity benefit auction for victims of crimes against mathematical constants.
1892: Physicist and academic Louis de Broglie born. He will postulate the wave nature of electrons and suggest that all matter has wave properties, winning the Nobel Prize for Physics in 1929, after the wave-like behavior of matter is first experimentally demonstrated in 1927.
1977: The Big Ear, a radio telescope operated by Ohio State University as part of the SETI project, receives a radio signal from deep space; the event is named the "Wow! signal" from the notation made by a volunteer on the project.
2015: Author, philosopher, and crime-fighter Umberto Eco publishes influential monograph on the origins and early development of high-energy literature.