Template:Selected anniversaries/July 20: Difference between revisions
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||1876: Mathematician and academic Otto Blumenthal dies in the Theresienstadt concentration camp. Blumenthal made a fundamental, though often overlooked, contribution to aerodynamics by building on Joukowsky's work to extract the complex transformation that carries the latter's name. Pic. | ||1876: Mathematician and academic Otto Blumenthal dies in the Theresienstadt concentration camp. Blumenthal made a fundamental, though often overlooked, contribution to aerodynamics by building on Joukowsky's work to extract the complex transformation that carries the latter's name. Pic. | ||
||1882: Olga Hahn-Neurath born ... mathematician and philosopher ... Boolean algebra. She is best known for being a member of the Vienna Circle. Pic search | ||1882: Olga Hahn-Neurath born ... mathematician and philosopher ... Boolean algebra. She is best known for being a member of the Vienna Circle. Pic search. | ||
||1888: Paul Langerhans dies ... pathologist, physiologist and biologist. Pic. | ||1888: Paul Langerhans dies ... pathologist, physiologist and biologist. Pic. | ||
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||1922: Andrey Markov dies ... mathematician and theorist. Pic. | ||1922: Andrey Markov dies ... mathematician and theorist. Pic. | ||
||1925: Eugene van Tamelen born ... organic chemist who is especially recognized for his contributions to bioorganic chemistry. He pioneered in what is today called biomimetic synthesis. Pic search groovy | ||1925: Eugene van Tamelen born ... organic chemist who is especially recognized for his contributions to bioorganic chemistry. He pioneered in what is today called biomimetic synthesis. Pic search groovy. | ||
||1929: Roland Lvovich Dobrushin born ... mathematician who made important contributions to probability theory, mathematical physics, and information theory. Pic. | ||1929: Roland Lvovich Dobrushin born ... mathematician who made important contributions to probability theory, mathematical physics, and information theory. Pic. | ||
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File:Bonus marchers.gif|link=Bonus Army (nonfiction)|1932: In Washington, D.C., police fire tear gas on World War I veterans, part of the [[Bonus Army (nonfiction)|Bonus Expeditionary Force]], who attempt to march to the White House. | File:Bonus marchers.gif|link=Bonus Army (nonfiction)|1932: In Washington, D.C., police fire tear gas on World War I veterans, part of the [[Bonus Army (nonfiction)|Bonus Expeditionary Force]], who attempt to march to the White House. | ||
||1933: Ciprian Foiaș born ... mathematician ... contributions in operator theory. Pic. | |||
||1934: Labor unrest in the U.S.: Police in Minneapolis fire upon striking truck drivers, during the Minneapolis Teamsters Strike of 1934, killing two and wounding sixty-seven. | ||1934: Labor unrest in the U.S.: Police in Minneapolis fire upon striking truck drivers, during the Minneapolis Teamsters Strike of 1934, killing two and wounding sixty-seven. | ||
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||1934: West Coast waterfront strike: In Seattle, police fire tear gas on and club 2,000 striking longshoremen. The governor of Oregon calls out the National Guard to break a strike on the Portland docks. | ||1934: West Coast waterfront strike: In Seattle, police fire tear gas on and club 2,000 striking longshoremen. The governor of Oregon calls out the National Guard to break a strike on the Portland docks. | ||
||1937: Olga Hahn-Neurath dies ... mathematician and philosopher ... Boolean algebra. She is best known for being a member of the Vienna Circle. Pic search | ||1937: Olga Hahn-Neurath dies ... mathematician and philosopher ... Boolean algebra. She is best known for being a member of the Vienna Circle. Pic search. | ||
File:Guglielmo Marconi.jpg|link=Guglielmo Marconi (nonfiction)|1937: Businessman and inventor [[Guglielmo Marconi (nonfiction)|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". | File:Guglielmo Marconi.jpg|link=Guglielmo Marconi (nonfiction)|1937: Businessman and inventor [[Guglielmo Marconi (nonfiction)|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". | ||
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||1969: Apollo program: Apollo 11's crew successfully makes the first manned landing on the Moon in the Sea of Tranquility. Americans Neil Armstrong and Buzz Aldrin became the first humans to walk on the Moon (July 21 UTC). | ||1969: Apollo program: Apollo 11's crew successfully makes the first manned landing on the Moon in the Sea of Tranquility. Americans Neil Armstrong and Buzz Aldrin became the first humans to walk on the Moon (July 21 UTC). | ||
||1970: Mathematician Ted Youngs dies. Youngs worked in geometric topology; he is famous for the Ringel–Youngs theorem which proved the Heawood conjecture, a problem closely related to the Four color theorem for surfaces of higher genus. Pic search | ||1970: Mathematician Ted Youngs dies. Youngs worked in geometric topology; he is famous for the Ringel–Youngs theorem which proved the Heawood conjecture, a problem closely related to the Four color theorem for surfaces of higher genus. Pic search. | ||
||1976: The American Viking 1 lander successfully lands on Mars. | ||1976: The American Viking 1 lander successfully lands on Mars. | ||
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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. | ||
||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. Pic search | ||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. Pic search. | ||
||1989: Valentine "Valya" Bargmann dies ... mathematician and theoretical physicist. Pic. | ||1989: Valentine "Valya" Bargmann dies ... mathematician and theoretical physicist. Pic. | ||
Revision as of 19:30, 14 April 2020
1597: Scholar, printer, and bookseller Franciscus Raphelengius dies. Raphelengius produced an Arabic-Latin dictionary, about 550 pages, which was published posthumously in 1613 at Leiden — the first publication by printing press of a book-length dictionary for the Arabic language in Latin.
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: Signed first edition of Two Creatures 2 stolen from the Weisman Art Museum in New Minneapolis, Canada by Killer Poke and his gang of criminal mathematical functions.
2018: Pin Man says he "was an unwilling test subject in the Project MKUltra (nonfiction)."