Template:Selected anniversaries/November 20: Difference between revisions
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File:Geometrical frustration icosahedron.jpg|link=Geometrical frustration (nonfiction)|1981: Outbreak of [[Geometrical frustration (nonfiction)|Geometrical frustration]] exposes new class of [[crimes against mathematical constants]]. | File:Geometrical frustration icosahedron.jpg|link=Geometrical frustration (nonfiction)|1981: Outbreak of [[Geometrical frustration (nonfiction)|Geometrical frustration]] exposes new class of [[crimes against mathematical constants]]. | ||
||Charles Cameron Conley (d. 20 November 1984) was an American mathematician who worked on dynamical systems. | |||
||Arne Carl-August Beurling (d. 20 November 1986) was a Swedish mathematician and professor of mathematics at Uppsala University (1937–1954) and later at the Institute for Advanced Study in Princeton, New Jersey. Beurling worked extensively in harmonic analysis, complex analysis and potential theory. The "Beurling factorization" helped mathematical scientists to understand the Wold decomposition, and inspired further work on the invariant subspaces of linear operators and operator algebras, e.g. Håkan Hedenmalm's factorization theorem for Bergman spaces. | ||Arne Carl-August Beurling (d. 20 November 1986) was a Swedish mathematician and professor of mathematics at Uppsala University (1937–1954) and later at the Institute for Advanced Study in Princeton, New Jersey. Beurling worked extensively in harmonic analysis, complex analysis and potential theory. The "Beurling factorization" helped mathematical scientists to understand the Wold decomposition, and inspired further work on the invariant subspaces of linear operators and operator algebras, e.g. Håkan Hedenmalm's factorization theorem for Bergman spaces. | ||
Revision as of 22:27, 28 November 2017
1889: Astronomer and cosmologist Edwin Hubble. He will discover the fact that the Andromeda "nebula" is actually another island galaxy far outside of our own Milky Way.
1908: Mathematician Georgy Voronoy dies. He invented what are today called Voronoi diagrams or Voronoi tessellations.
1924: Mathematician Benoit Mandelbrot born.
1924: Captive supervillain Fugitive Rubies gathering strength for escape attempt, says Niles Cartouchian.
1934: Mathematician, physicist, and astronomer Willem de Sitter dies. He co-authored a paper with Albert Einstein in 1932 in which they discuss the implications of cosmological data for the curvature of the universe.
1980: Lake Peigneur drains into an underlying salt deposit. A misplaced Texaco oil probe had been drilled into the Diamond Crystal Salt Mine, causing water to flow down into the mine, eroding the edges of the hole.
1980: Voyager 1 flies by Saturn, completing its primary mission.
1981: Outbreak of Geometrical frustration exposes new class of crimes against mathematical constants.