Template:Selected anniversaries/April 30
1777: Mathematician, astronomer, and physicist Carl Friedrich Gauss born. He will have an exceptional influence in many fields of mathematics and science and be ranked as one of history's most influential mathematicians.
1916: Mathematician, engineer, and information scientist Claude Shannon born.
1996: Asclepius Myrmidon discovers unregistered halting problem, predicts new class of crimes against mathematical constants.
1905 – Sergey Nikolsky, Russian mathematician and academic (d. 2012)
1897 – J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.[1]
1943 – World War II: Operation Mincemeat: The submarine HMS Seraph surfaces in the Mediterranean Sea off the coast of Spain to deposit a dead man planted with false invasion plans and dressed as a British military intelligence officer.