Template:Selected anniversaries/September 3
1658: Oliver Cromwell dies. He was a military and political leader and later Lord Protector of the Commonwealth of England, Scotland, and Ireland.
1814: Mathematician and academic James Joseph Sylvester born. He will make fundamental contributions to matrix theory, invariant theory, number theory, partition theory, and combinatorics.
1916: Archaeologist and crime-fighter Sylvanus Morley uses archaeological expedition to Mexico during World War I as cover story for secret investigation into alleged Maya-related crimes against mathematical constants.
1928: Inventor Philo Farnsworth demonstrates his electronic television system to the press.
1975: Vulnerability in Forbidden graph characterization exploited in blackmail scheme by criminal mathematician Anarchimedes.
2017: Dennis Paulson of Mars celebrates the forty-first anniversary of the end of the Viking 2 spacecraft landing at Utopia Planitia on Mars.