Template:Selected anniversaries/April 9: Difference between revisions
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File:Charles Proteus Steinmetz.jpg|link=Charles Proteus Steinmetz (nonfiction)|1865: Mathematician and electrical engineer [[Charles Proteus Steinmetz (nonfiction)|Charles Proteus Steinmetz]] born. He will foster the development of alternating current, formulating mathematical theories which will advance the expansion of the electric power industry in the United States. | File:Charles Proteus Steinmetz.jpg|link=Charles Proteus Steinmetz (nonfiction)|1865: Mathematician and electrical engineer [[Charles Proteus Steinmetz (nonfiction)|Charles Proteus Steinmetz]] born. He will foster the development of alternating current, formulating mathematical theories which will advance the expansion of the electric power industry in the United States. | ||
||André-Michel Guerry (d. April 9, 1866) was a French lawyer and amateur statistician. Together with Adolphe Quetelet he may be regarded as the founder of moral statistics which led to the development of criminology, sociology and ultimately, modern social science. | |||
||Élie Joseph Cartan, ForMemRS (b. 9 April 1869) was an influential French mathematician who did fundamental work in the theory of Lie groups and their geometric applications. He also made significant contributions to mathematical physics, differential geometry, differential equations, group theory and quantum mechanics. | ||Élie Joseph Cartan, ForMemRS (b. 9 April 1869) was an influential French mathematician who did fundamental work in the theory of Lie groups and their geometric applications. He also made significant contributions to mathematical physics, differential geometry, differential equations, group theory and quantum mechanics. | ||
Revision as of 16:03, 3 December 2017
1770: Physicist and academic Thomas Johann Seebeck born. He will discover the thermoelectric effect.
1805: Mathematician and crime-fighter Joseph-Louis Lagrange delivers lecture on applications of number theory to the detection and prevention of crimes against mathematical constants.
1860: On his phonautograph machine, Édouard-Léon Scott de Martinville makes the oldest known recording of an audible human voice. A visual recording of audio data, it will first be played back in 2008.
1864: Engineer and physicist Wilhelm Röntgen uses X-rays generator to expose loaded dice, reveals organized math crime cartel in casinos around the world.
1865: Mathematician and electrical engineer Charles Proteus Steinmetz born. He will foster the development of alternating current, formulating mathematical theories which will advance the expansion of the electric power industry in the United States.
1917: Mathematician and philosopher Georg Cantor publishes new theory of sets derived from Gnomon algorithm functions. Colleagues hail it as "a magisterial contribution to science and art of detecting and preventing crimes against mathematical constants."
1978: Musician and alleged math criminal Skip Digits performs at the Kennedy Center for the Arts.