Template:Selected anniversaries/April 28: Difference between revisions
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||1838: Jenő Hunyady born ... mathematician noted for his work on conic sections and linear algebra, specifically on determinants. Pic. | ||1838: Jenő Hunyady born ... mathematician noted for his work on conic sections and linear algebra, specifically on determinants. Pic. | ||
||1854: Hertha Ayrton born ... engineer, mathematician, physicist, and inventor ... worked on electric arcs and ripples in sand and water. Pic. | ||1854: Hertha Ayrton born ... engineer, mathematician, physicist, and inventor ... worked on electric arcs and ripples in sand and water. Pic. | ||
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||1975: Hans Heilbronn dies ... mathematician. He will prove that the class number of the number field {\displaystyle \mathbb {Q} ({\sqrt {-d}})} \mathbb{Q}(\sqrt{-d}) tends to plus infinity as {\displaystyle d} d does Pic: https://www.bristol.ac.uk/news/2008/5965.html | ||1975: Hans Heilbronn dies ... mathematician. He will prove that the class number of the number field {\displaystyle \mathbb {Q} ({\sqrt {-d}})} \mathbb{Q}(\sqrt{-d}) tends to plus infinity as {\displaystyle d} d does Pic: https://www.bristol.ac.uk/news/2008/5965.html | ||
File:Chernobyl disaster.jpg|link=Chernobyl disaster (nonfiction)|1986: High levels of radiation resulting from the [[Chernobyl disaster (nonfiction)|Chernobyl disaster]] are detected at a nuclear power plant in Sweden, leading Soviet authorities to publicly announce the accident. | File:Chernobyl disaster.jpg|link=Chernobyl disaster (nonfiction)|1986: High levels of radiation resulting from the [[Chernobyl disaster (nonfiction)|Chernobyl disaster]] are detected at a nuclear power plant in Sweden, leading Soviet authorities to publicly announce the accident. | ||
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||2016: Ingram Olkin dies ... professor emeritus and chair of statistics and education at Stanford University and the Stanford Graduate School of Education. He is known for developing statistical analysis for evaluating policies, particularly in education, and for his contributions to meta-analysis, statistics education, multivariate analysis, and majorization theory. Pic. | ||2016: Ingram Olkin dies ... professor emeritus and chair of statistics and education at Stanford University and the Stanford Graduate School of Education. He is known for developing statistical analysis for evaluating policies, particularly in education, and for his contributions to meta-analysis, statistics education, multivariate analysis, and majorization theory. Pic. | ||
File:Voronoi-diagram-color-commentators.jpg|link=Fantasy Voronoi diagram|2017: New survey shows that [[Fantasy Voronoi diagram]] is more popular than | File:Voronoi-diagram-color-commentators.jpg|link=Fantasy Voronoi diagram|2017: New survey shows that [[Fantasy Voronoi diagram]] is more popular than Fantasy American Football. | ||
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Revision as of 22:44, 26 January 2022
1402: Aztec philosopher, warrior, architect, poet, and ruler Nezahualcoyotl born. He will have an experience of an "Unknown, Unknowable Lord of Everywhere" to whom he will build an entirely empty temple in which no blood sacrifices of any kind will be allowed.
1693: Gottfried Wilhelm Leibniz writes to L'Hospital, announcing his discovery of determinants fifty years before Cramer, who was the real driving force in the development of determinants. Leibniz's work had little or no influence because it was not published until 1850 in his Mathematische Schriften.
1774: Astronomer Francis Baily born. He will observe "Baily's beads" during an annular eclipse (1836).
1817: Carl Friedrich Gauss writes to the astronomer H. W. M. Oblers, saying, "I am becoming more and more convinced that the necessity of our (Euclidean) geometry cannot be proved, at least not by human intellect nor for the human intellect."
1868: Mathematician Georgy Voronoy born. He will invent what are today called Voronoi diagrams or Voronoi tessellations.
1906: Mathematician, philosopher, and academic Kurt Gödel born. His two incompleteness theorems will have an immense impact upon scientific and philosophical thinking in the 20th century.
1928: Geologist and astronomer Eugene Merle Shoemaker born. Shoemaker will be the first scientist to conclude that Barringer Meteor Crater in Arizona, and similar craters, were caused by meteor impact.
1986: High levels of radiation resulting from the Chernobyl disaster are detected at a nuclear power plant in Sweden, leading Soviet authorities to publicly announce the accident.
1999: Physicist and engineer Rolf Landauer dies. Landauer discovered that in any logically irreversible operation that manipulates information, such as erasing a bit of memory, entropy increases and an associated amount of energy is dissipated as heat. This phenomenon is now known as Landauer's principle.
2017: New survey shows that Fantasy Voronoi diagram is more popular than Fantasy American Football.