Template:Selected anniversaries/December 23: Difference between revisions
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||1989: Richard Rado dies ... mathematician whose research concerned combinatorics and graph theory. In graph theory, the Rado graph, a countably infinite graph containing all countably infinite graphs as induced subgraphs, is named after Rado. He rediscovered it in 1964 after previous works on the same graph by Wilhelm Ackermann, Paul Erdős, and Alfréd Rényi. Pic. | ||1989: Richard Rado dies ... mathematician whose research concerned combinatorics and graph theory. In graph theory, the Rado graph, a countably infinite graph containing all countably infinite graphs as induced subgraphs, is named after Rado. He rediscovered it in 1964 after previous works on the same graph by Wilhelm Ackermann, Paul Erdős, and Alfréd Rényi. Pic. | ||
||2001: Donald Clayton Spencer dies ... mathematician, known for work on deformation theory of structures arising in differential geometry, and on several complex variables from the point of view of partial differential equations. | ||2001: Donald Clayton Spencer dies ... mathematician, known for work on deformation theory of structures arising in differential geometry, and on several complex variables from the point of view of partial differential equations. Pic: https://www.geni.com/people/Donald-Spencer/6000000000566571886 | ||
||2013: Mikhail Kalashnikov dies ... Russian general and weapons designer, designed the AK-47 rifle. | ||2013: Mikhail Kalashnikov dies ... Russian general and weapons designer, designed the AK-47 rifle. | ||
||2014: Robert V. Hogg, American statistician and academic. | ||2014: Robert V. Hogg, American statistician and academic. Pic: https://clas.uiowa.edu/news/clas-mourns-passing-professor-emeritus-robert-v-hogg-pioneering-statistician-teacher-mentor-and | ||
||December 23 is the fictional date of the [[Zendian problem (nonfiction)|Zendian problem]], a US Army cryptography training exercise involving 375 radio messages said to have been intercepted on December 23 by the US Army contingent of a United Nations force landed on the fictional island of Zendia in the Pacific Ocean. | ||December 23 is the fictional date of the [[Zendian problem (nonfiction)|Zendian problem]], a US Army cryptography training exercise involving 375 radio messages said to have been intercepted on December 23 by the US Army contingent of a United Nations force landed on the fictional island of Zendia in the Pacific Ocean. | ||
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Revision as of 12:57, 21 August 2018
1722: Mathematician and academic Pierre Varignon dies. He simplified the proofs of many propositions in mechanics, adapted Leibniz's calculus to the inertial mechanics of Newton's Principia, and treated mechanics in terms of the composition of forces.
1822: Inventor and engineer Wilhelm Bauer born. He will design and invent submarines.
1948: Mathematician Wilhelm Ackermann publishes his research on applications of the Ackermann function to detecting and preventing crimes against mathematical constants.