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On This Day ...

Important events from the history of math that happened on this day:

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October 18th

1640 Fermat announced his "little theorem" in a letter to Bernard Frenicle de Bessey.

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Fermat's Little Theorem
Pierre de Fermat
Frenicle de Bessey
1871 Charles Babbage, computer pioneer, died in London, England. His obsession with mechanizing computation made him (reputedly) into an embittered and crotchety old man. He especially hated street musicians, whose activities, he figured, ruined a quarter of his working potential.

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Charles Babbage
1921 Niels Bohr introduced his quantum model of the atom. Bohr worked for a few years in Manchester, England with Rutherford, but spent most of his life in the city of his birth, Copenhagen, Denmark.

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Niels Bohr
Bohr Models

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