Template:Selected anniversaries/July 20: Difference between revisions

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||1976 – The American Viking 1 lander successfully lands on Mars.
||1976 – The American Viking 1 lander successfully lands on Mars.


||Joseph John Rochefort (d. July 20, 1976) was an American Naval officer and cryptanalyst. His contributions and those of his team were pivotal to victory in the Pacific War. Rochefort was a major figure in the United States Navy's cryptographic and intelligence operations from 1925 to 1946, particularly in the Battle of Midway.
||1976: Joseph John Rochefort dies ... American Naval officer and cryptanalyst. His contributions and those of his team were pivotal to victory in the Pacific War. Rochefort was a major figure in the United States Navy's cryptographic and intelligence operations from 1925 to 1946, particularly in the Battle of Midway.


||1977 – The Central Intelligence Agency releases documents under the Freedom of Information Act revealing it had engaged in mind-control experiments
||1977: The Central Intelligence Agency releases documents under the Freedom of Information Act revealing it had engaged in mind-control experiments


||Fritz Joachim Weyl (d. July 20, 1977) was born in Zurich, Switzerland. Today Weyl is regarded as a renowned mathematician.
||Fritz Joachim Weyl (d. July 20, 1977) was born in Zurich, Switzerland. Today Weyl is regarded as a renowned mathematician.
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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.
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.


||Gabriel Andrew Dirac (d. 20 July 1984) was a mathematician who mainly worked in graph theory. He stated a sufficient condition for a graph to contain a Hamiltonian circuit. In 1951 he conjectured that n points in the plane, not all collinear, must span at least [n/2] two-point lines, where [x] is the largest integer not exceeding x. This conjecture is still open.
||1984: Gabriel Andrew Dirac dies ... mathematician who mainly worked in graph theory. He stated a sufficient condition for a graph to contain a Hamiltonian circuit. In 1951 he conjectured that n points in the plane, not all collinear, must span at least [n/2] two-point lines, where [x] is the largest integer not exceeding x. This conjecture is still open.


||Valentine "Valya" Bargmann (d. July 20, 1989) was a German-American mathematician and theoretical physicist.
||1989: Valentine "Valya" Bargmann dies ... mathematician and theoretical physicist.


||Karl Longin Zeller (d. 2006, Tübingen) was a German mathematician and computer scientist who worked in numerical analysis and approximation theory. 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. He earned his Ph.D. from the University of Tübingen in 1950, under the supervision of Konrad Knopp and Erich Kamke, 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.
||2006: Karl Longin Zeller dies ... mathematician and computer scientist who worked in numerical analysis and approximation theory. 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. He earned his Ph.D. from the University of Tübingen in 1950, under the supervision of Konrad Knopp and Erich Kamke, 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.
||2007: Kai Manne Börje Siegbahn dies ... physicist.


Two_Creatures_2.jpg|link=Two Creatures 2 (nonfiction)|2016: Signed first edition of ''[[Two Creatures 2 (nonfiction)|Two Creatures 2]]'' stolen from the Weisman Art Museum in [[New Minneapolis, Canada]].
Two_Creatures_2.jpg|link=Two Creatures 2 (nonfiction)|2016: Signed first edition of ''[[Two Creatures 2 (nonfiction)|Two Creatures 2]]'' stolen from the Weisman Art Museum in [[New Minneapolis, Canada]] by [[Killer Poke]] and his gang of [[Crimes against mathematical constants|criminal mathematical functions]].


File:Pin Man.jpg|link=Pin Man|2017: [[Pin Man]] says he "was an unwilling test subject in the [[Project MKUltra (nonfiction)]]."
File:Pin Man.jpg|link=Pin Man|2017: [[Pin Man]] says he "was an unwilling test subject in the [[Project MKUltra (nonfiction)]]."


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Revision as of 11:15, 14 September 2018

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