Template:Selected anniversaries/September 23: Difference between revisions
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||1946: Gennady Chibisov born ... cosmologist. He obtained his PhD in 1972, from the Moscow Institute of Physics and Technology, with a thesis entitled "Entropy perturbations in cosmology". He is best known for his 1981 paper on the origin of cosmological density perturbations from quantum fluctuations, coauthored with Viatcheslav Mukhanov. This is the earliest of a number of calculations addressing the origin of density fluctuations in inflationary cosmology, which is the most common hypothesis for the origin of the expanding universe and the structure within it. Pic. | ||1946: Gennady Chibisov born ... cosmologist. He obtained his PhD in 1972, from the Moscow Institute of Physics and Technology, with a thesis entitled "Entropy perturbations in cosmology". He is best known for his 1981 paper on the origin of cosmological density perturbations from quantum fluctuations, coauthored with Viatcheslav Mukhanov. This is the earliest of a number of calculations addressing the origin of density fluctuations in inflationary cosmology, which is the most common hypothesis for the origin of the expanding universe and the structure within it. Pic. | ||
||1971: James Waddell Alexander II dies ... mathematician and topologist. | ||1971: James Waddell Alexander II dies ... mathematician and topologist. Pic. | ||
||1974: Willem van der Woude dies ... mathematician. Pic. | ||1974: Willem van der Woude dies ... mathematician. Pic. | ||
||1983: Szolem Mandelbrojt dies ... mathematician who specialized in mathematical analysis. Pic. | |||
||1999: NASA announces that it has lost contact with the Mars Climate Orbiter. | ||1999: NASA announces that it has lost contact with the Mars Climate Orbiter. | ||
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||2004: Bryce Seligman DeWitt dies ... theoretical physicist who studied gravity and field theories. Pic. | ||2004: Bryce Seligman DeWitt dies ... theoretical physicist who studied gravity and field theories. Pic. | ||
||2017: Lester Randolph Ford Jr. dies ... mathematician specializing in network flow problems. | ||2017: Lester Randolph Ford Jr. dies ... mathematician specializing in network flow problems. Pic search: https://www.google.com/search?q=Lester+Randolph+Ford+Jr. | ||
Violet_Spiral_2.jpg|link=Violet Spiral 2 (nonfiction)|2018: Steganographic analysis of ''[[Violet Spiral 2 (nonfiction)|Violet Spiral 2]]'' unexpectedly reveals "between seven hundred and eight hundred kilobytes" of previously unknown [[Gnomon algorithm]]-based [[Nomogram (nonfiction)|nomograms]]. | Violet_Spiral_2.jpg|link=Violet Spiral 2 (nonfiction)|2018: Steganographic analysis of ''[[Violet Spiral 2 (nonfiction)|Violet Spiral 2]]'' unexpectedly reveals "between seven hundred and eight hundred kilobytes" of previously unknown [[Gnomon algorithm]]-based [[Nomogram (nonfiction)|nomograms]]. | ||
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Revision as of 07:58, 12 January 2019
1044: Composer, mathematician, astronomer, and Gnomon algorithm theorist Hermann of Reichenau uses an improvised astrolabe to defeat his rival Anarchimedes in mathematical-astronomical combat.
1785: Lawyer, translator, and inventor Per Georg Scheutz born. He will invent the Scheutzian calculation engine, based on Charles Babbage's difference engine.
1877: Mathematician and astronomer Urbain Le Verrier dies. He predicted the existence and position of Neptune using only mathematics, an event widely regarded as one of the most remarkable moments of 19th century science.
1878: Astronomer and crime-fighter Maria Mitchell publishes new class of Gnomon algorithm functions which predict and prevent astronomical crimes against mathematical constants.
1884: Patent filed for Herman Hollerith's tabulating machine. Hollerith's machines will be used in the 1890 US Census and in 1924 he and others will form the company that will become IBM.
1915: Physicist and academic Clifford Shull born. He will share the 1994 Nobel Prize in Physics with Bertram Brockhouse for the development of the neutron scattering technique.
1938: Mathematician and engineer Philbert Maurice d’Ocagne dies. He founded the field of nomography, the graphic computation of algebraic equations, on charts which he called nomograms.
2018: Steganographic analysis of Violet Spiral 2 unexpectedly reveals "between seven hundred and eight hundred kilobytes" of previously unknown Gnomon algorithm-based nomograms.