On This Day ...
Important events from the history of math that happened on this day:
Choose a day and month and click the button to see events from history for that day.
September 25th
| 1644 | Ole Romer born in Arhus. The Danish astronomer was the first to measure the speed of light.
More information about: Ole Romer and the speed of light |
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| 1654 | Fermat wrote Pascal to defend a combinatorial method that Pascal had previously regarded as incorrect.
More information about: Pierre de Fermat Blaise Pascal |
| 1819 | George Salmon born in Cork, Ireland. Like his friends Cayley and Sylvester, he would work in algebraic geometry.
More information about: George Salmon Arthur Cayley James Joseph Sylvester |
For more information, click on any of the links provided.