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* [[Calendrical coincidences (nonfiction)]] | * [[Calendrical coincidences (nonfiction)]] |
Revision as of 06:08, 10 September 2019
Gnomon Chronicles is a work of fiction and nonfiction by Karl Jones (nonfiction).
On This Day in History: September 30
1550: Astronomer and mathematician Michael Maestlin born. He will be a mentor to Johannes Kepler, and play a sizable part in his adoption of the Copernican system.
1882: Thomas Edison's first commercial hydroelectric power plant (later known as Appleton Edison Light Company) begins operation on the Fox River in Appleton, Wisconsin, United States.
1913: Mathematician Samuel Eilenberg born. He will co-found category theory with Saunders Mac Lane, and propose the Eilenberg swindle (a construction applying the telescoping cancellation idea to projective modules).
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