On This Day ...
Important events from the history of math that happened on this day:
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February 13th
| 1678 | Danish astronomer Tycho Brahe gave his first account of what came to be known as the Tychonian planetary system.
More information about: Tycho Brahe The Tychonian System |
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| 1805 | Dirichlet born in Duren, Germany. He was precociously interested in mathematics, even using his pocket money to buy mathematics books before the age of 12. The number theorist is most famous for proving that certain arithmetic progressions contain infinitely many primes.
More information about: Johann Peter Gustav Lejeune Dirichlet |
| 1956 | Jan Lukasiewicz, logician and inventor of "Polish notation," died in Dublin, Ireland.
More information about: Jan Lukasiewicz |
| 1980 | Marian Rejewski, breaker of the German Enigma code during the 1930s, died in Warsaw, Poland.
More information about: Marian Adam Rejewski |
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