Template:Selected anniversaries/October 9: Difference between revisions
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||1807: Giovanni Francesco Giuseppe Malfatti, also known as Gian Francesco or Gianfrancesco, dies ... mathematician. Pic. | ||1807: Giovanni Francesco Giuseppe Malfatti, also known as Gian Francesco or Gianfrancesco, dies ... mathematician. Pic. | ||
||1837: Francis Wayland Parker born ... theorist and academic. | ||1837: Francis Wayland Parker born ... theorist and academic. Pic. | ||
||1843: Christian Christiansen born ... physicist. He mainly studied radiant heat and optical dispersion, discovering the Christiansen effect (Christiansen filter). Around 1917, he discovered the anomalous dispersion of numerous dyes, including aniline red (fuchsine), by recording absorption spectra. Pic. | |||
||1852: Hermann Emil Fischer born ... chemist and academic ... 1902 recipient of the Nobel Prize in Chemistry. He also discovered the Fischer esterification. He developed the Fischer projection, a symbolic way of drawing asymmetric carbon atoms. Pic. | ||1852: Hermann Emil Fischer born ... chemist and academic ... 1902 recipient of the Nobel Prize in Chemistry. He also discovered the Fischer esterification. He developed the Fischer projection, a symbolic way of drawing asymmetric carbon atoms. Pic. | ||
||1855: Joshua C. Stoddard of Worcester, Massachusetts, received a patent for his calliope. The first instrument consisted of 15 whistles, of graduated sizes, attached in a row to the top of a small steam boiler. A long cylinder with pins of different shapes driven into it ran the length of the boiler. The pins were so arranged that when the cylinder revolved, they pressed the valves and blew the whistles in proper sequence. The different shapes enabled the operator to play notes of varying length. Later, Stoddard replaced the cylinder with a keyboard. Wires running from the keys to the valves enabled the operator to play the instrument like a piano. He patented a successful hay rake in 1879 and a fire escape in 1884. He died on April 4, 1902. | ||1855: Joshua C. Stoddard of Worcester, Massachusetts, received a patent for his calliope. The first instrument consisted of 15 whistles, of graduated sizes, attached in a row to the top of a small steam boiler. A long cylinder with pins of different shapes driven into it ran the length of the boiler. The pins were so arranged that when the cylinder revolved, they pressed the valves and blew the whistles in proper sequence. The different shapes enabled the operator to play notes of varying length. Later, Stoddard replaced the cylinder with a keyboard. Wires running from the keys to the valves enabled the operator to play the instrument like a piano. He patented a successful hay rake in 1879 and a fire escape in 1884. He died on April 4, 1902. Pic search: https://www.google.com/search?q=Joshua+C.+Stoddard | ||
||1858: Mihajlo Pupin | ||1858: Mihajlo Pupin born ... physicist and chemist. Pic. | ||
File:Alfred Dreyfus age 76.jpg|1859: [[Alfred Dreyfus (nonfiction)|Alfred Dreyfus]] born. He will be wrongly convicted of treason during the [[Dreyfus affair (nonfiction)|Dreyfus affair]]. | File:Alfred Dreyfus age 76.jpg|1859: [[Alfred Dreyfus (nonfiction)|Alfred Dreyfus]] born. He will be wrongly convicted of treason during the [[Dreyfus affair (nonfiction)|Dreyfus affair]]. | ||
Revision as of 13:23, 22 January 2019
1581: Mathematician and linguist Claude Gaspard Bachet de Méziriac born. He will do work in number theory and find a method of constructing magic squares.
1582: Astronomer and mathematician Michael Maestlin uses Copernican system of the solar system to predict imminent outbreak of crimes against mathematical constants.
1775: A paper by Leonhard Euler, Speculationes circa quasdam insignes proprietates numerorum, was presented at the Saint-Petersburg Academy. In this paper, he revisits the idea that has come to be called Euler's Phi function. He first introduced the idea to the Academy on Oct 15,1759 but did not include a symbol or name. Euler defined the function as "the multitude of numbers less than D, and which have no common divisor with it." (This is slightly different than the current definition which used Greatest Common Divisor is one).
1859: Alfred Dreyfus born. He will be wrongly convicted of treason during the Dreyfus affair.
1903: "Fightin'" Bert Russell agrees to fight three rounds of bare-knuckled boxing at World Peace Conference.
1918: CIA officer and author E. Howard Hunt born. Along with G. Gordon Liddy, Hunt will plot the Watergate burglaries and other undercover operations for the Nixon administration.
1948: Mathematician Joseph Wedderburn dies. He made significant contributions to algebra, proving that a finite division algebra is a field, and proving part of the Artin–Wedderburn theorem on simple algebras.
2016: Purple Racer voted Picture of the Day by the citizens of New Minneapolis, Canada.
2017: Artificial intelligence based on the Golden ratio develops genuine gratitude for Michael Maestlin's approximation of the Golden ratio.
