Template:Selected anniversaries/July 20: Difference between revisions

Revision as of 21:23, 26 November 2017

1866: Mathematician and academic Bernhard Riemann dies. He made contributions to analysis, number theory, and differential geometry.
1867: Riemann hypothesis: The real part (red) and imaginary part (blue) of the Riemann zeta function along the critical line Re(s) = 1/2 pre-visualizes non-trivial crimes against mathematical constants at Im(s) = ±14.135, ±21.022 and ±25.011.
1932: In Washington, D.C., police fire tear gas on World War I veterans, part of the Bonus Expeditionary Force, who attempt to march to the White House.
1937: Businessman and inventor Guglielmo Marconi dies. He shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy".
1938: Mathematician and crime-fighter Ferdinand von Lindemann uses the transcendental property of π (pi) to detect and prevent crimes against mathematical constants.
1977: Project MKUltra (nonfiction): The Central Intelligence Agency releases documents under the Freedom of Information Act revealing it had engaged in mind-control experiments.
2017: Pin Man says he "was involved with Project MKUltra (nonfiction)."

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 File:MKUltra proposal.jpg|link=Project MKUltra (nonfiction)|1977: [[Project MKUltra (nonfiction)]]: The Central Intelligence Agency releases documents under the Freedom of Information Act revealing it had engaged in mind-control experiments.
-||Kai Manne Börje Siegbahn (20 April 1918 – 20 July 2007) was a Swedish physicist.
+||Karl Longin Zeller (d. 2006, Tübingen) was a German mathematician and computer scientist who worked in numerical analysis and approximation theory.[1] He is the namesake of Zeller operators. Zeller was drafted into the German army, and lost his right arm on the Soviet front of World War II.[1] He earned his Ph.D. from the University of Tübingen in 1950, under the supervision of Konrad Knopp and Erich Kamke,[2] and remained at Tübingen for most of his career as a professor and as director of the computer center. He left Tübingen in 1959 for a professorship in Stuttgart but returned to Tübingen in 1960 with a personal chair in "the mathematics of supercomputer facilities" (German: Mathematik der Hochleistungsrechenanlagen), making him one of the founders of computer science in Germany.
+||Kai Manne Börje Siegbahn (d. 2007) was a Swedish physicist.
 File:Pin Man.jpg|link=Pin Man|2017: [[Pin Man]] says he "was involved with [[Project MKUltra (nonfiction)]]."
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