Main Page: Difference between revisions
No edit summary |
No edit summary |
||
| Line 16: | Line 16: | ||
[[Dramatis Personae]], [[Special:Random|Random page]], [{{fullurl:Special:RecentChanges|namespace=0&days=240&limit=500}} Recent changes], [[Special:Categories|Categories]], [[Special:AllPages|All pages]], and [[Special:Search|Search]]. | [[Dramatis Personae]], [[Special:Random|Random page]], [{{fullurl:Special:RecentChanges|namespace=0&days=240&limit=500}} Recent changes], [[Special:Categories|Categories]], [[Special:AllPages|All pages]], and [[Special:Search|Search]]. | ||
Revision as of 11:34, 18 April 2020
Gnomon Chronicles is a work of fiction and nonfiction by Karl Jones (nonfiction).
Are You Sure ...
... that the first known calculation of the golden ratio, expressed inversely as a decimal of "about 0.6180340", was written in 1597 by astronomer and mathematician Maestlin in a letter to Johannes Kepler?
On This Day in History and Fiction: 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).
Permalink: September 30
What next?
General interest:
Dramatis Personae, Random page, Recent changes, Categories, All pages, and Search.