Template:Selected anniversaries/September 20: Difference between revisions

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||1519: Ferdinand Magellan sets sail from Sanlúcar de Barrameda with about 270 men on his expedition to circumnavigate the globe. Pic.
||1519: Ferdinand Magellan sets sail from Sanlúcar de Barrameda with about 270 men on his expedition to circumnavigate the globe. Pic.


File:Gerolamo Cardano.jpg|link=Gerolamo Cardano (nonfiction)|1544: Mathematician and crime-fighter [[Gerolamo Cardano (nonfiction)|Gerolamo Cardano]] uses the generating circles of hypocycloids (later named Cardano circles or cardanic circles) to detect and prevent [[crimes against mathematical constants]].
||Three Brothers Jewel = The jewel is described in a list of items delivered to Mary as "a great pendounte bought of the ffowlkers in fflaunders havinge three lardge ballaces set without foyle, one lardge pointed diamounte and iiij lardge perles, whereof one is pendaunte". Pic.


||1614: Martino Martini born ... Jesuit missionary, cartographer and historian, mainly working on ancient Imperial China. Pic.
||1614: Martino Martini born ... Jesuit missionary, cartographer and historian, mainly working on ancient Imperial China. Pic.
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||1903: Mathematician Frank Nelson Cole famously made a presentation to a meeting of the American Mathematical Society where he identified the factors of the Mersenne number 267 − 1, or M67. Pic.
||1903: Mathematician Frank Nelson Cole famously made a presentation to a meeting of the American Mathematical Society where he identified the factors of the Mersenne number 267 − 1, or M67. Pic.


||1906: Vera Faddeeva born ... mathematician. Faddeeva published some of the first work in the field of linear algebra. Her 1950 work, ''Computational methods of linear algebra'', was widely acclaimed; she won a USSR State Prize for it. Pic.
File:Vera_Faddeeva.jpg|link=Vera Faddeeva (nonfiction)|1906: Mathematician [[Vera Faddeeva (nonfiction)|Vera Faddeeva]] born. Faddeeva will pioneer the field of linear algebra; her ''Computational Methods of Linear Algebra'' (1950) will be widely acclaimed.


||1906: Sir Philip Stuart Milner-Barry born ... chess player, chess writer, World War II codebreaker and civil servant. He represented England in chess both before and after World War II. He worked at Bletchley Park during World War II, and was head of "Hut 6", a section responsible for deciphering messages which had been encrypted using the German Enigma machine. Pic.
||1906: Sir Philip Stuart Milner-Barry born ... chess player, chess writer, World War II codebreaker and civil servant. He represented England in chess both before and after World War II. He worked at Bletchley Park during World War II, and was head of "Hut 6", a section responsible for deciphering messages which had been encrypted using the German Enigma machine. Pic.
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File:Petrozavodsk phenomenon photo copy.jpg|link=Petrozavodsk phenomenon (nonfiction)|1977: A series of celestial events occurs, with sightings reported over a vast territory, from Copenhagen and Helsinki in the west to Vladivostok in the east. It is commonly known as the [[Petrozavodsk phenomenon (nonfiction)|The Petrozavodsk phenomenon]] after the city of Petrozavodsk in Russia (then in the Soviet Union), where a glowing object which showered the city with numerous rays was widely reported. The nature of the phenomenon is disputed.
File:Petrozavodsk phenomenon photo copy.jpg|link=Petrozavodsk phenomenon (nonfiction)|1977: A series of celestial events occurs, with sightings reported over a vast territory, from Copenhagen and Helsinki in the west to Vladivostok in the east. It is commonly known as the [[Petrozavodsk phenomenon (nonfiction)|The Petrozavodsk phenomenon]] after the city of Petrozavodsk in Russia (then in the Soviet Union), where a glowing object which showered the city with numerous rays was widely reported. The nature of the phenomenon is disputed.


File:Alice Beta.jpg|link=Alice Beta|1989: Mathematicians [[Alice Beta]] and [[Paul Erdős (nonfiction)|Paul Erdős]] co-publish a new class of [[Gnomon algorithm functions]] which detect and prevent [[crimes against mathematical constants]].
File:Paul Erdős.jpg|link=Paul Erdős (nonfiction)|1996: Mathematician and academic [[Paul Erdős (nonfiction)|Paul Erdős]] dies. Erdős firmly believed mathematics to be a social activity, living an itinerant lifestyle with the sole purpose of writing mathematical papers with other mathematicians.


File:Paul Erdős.jpg|link=Paul Erdős (nonfiction)|1996: Mathematician and academic [[Paul Erdős (nonfiction)|Paul Erdős]] dies. He firmly believed mathematics to be a social activity, living an itinerant lifestyle with the sole purpose of writing mathematical papers with other mathematicians.
||2000: The United Kingdom's MI6 Secret Intelligence Service building is attacked by individuals using a Russian-built RPG-22 anti-tank missile.  
 
File:Janet Beta at ENIAC.jpg|link=Janet Beta at ENIAC|1997: Signed first edition of ''Janet Beta at ENIAC'' sells for five hundred thousand dollars at charity auction to benefit victims of [[crimes against mathematical constants]].
 
||2000: The United Kingdom's MI6 Secret Intelligence Service building is attacked by individuals using a Russian-built RPG-22 anti-tank missile. The perpetrators remain unidentified.
 
File:Traveller.jpg|link=Traveller (nonfiction)|2016: ''[[Traveller (nonfiction)|Traveller]]'' voted Picture of the Day by the citizens of [[New Minneapolis, Canada]].


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Latest revision as of 14:03, 7 February 2022

  • 1842: Chemist and physicist James Dewar born. He will invent the vacuum flask, which he will use in conjunction with extensive research into the liquefaction of gases.

    1842: Chemist and physicist James Dewar born. He will invent the vacuum flask, which he will use in conjunction with extensive research into the liquefaction of gases.

  • 1906: Mathematician Vera Faddeeva born. Faddeeva will pioneer the field of linear algebra; her Computational Methods of Linear Algebra (1950) will be widely acclaimed.

    1906: Mathematician Vera Faddeeva born. Faddeeva will pioneer the field of linear algebra; her Computational Methods of Linear Algebra (1950) will be widely acclaimed.

  • 1977: A series of celestial events occurs, with sightings reported over a vast territory, from Copenhagen and Helsinki in the west to Vladivostok in the east. It is commonly known as the The Petrozavodsk phenomenon after the city of Petrozavodsk in Russia (then in the Soviet Union), where a glowing object which showered the city with numerous rays was widely reported. The nature of the phenomenon is disputed.

    1977: A series of celestial events occurs, with sightings reported over a vast territory, from Copenhagen and Helsinki in the west to Vladivostok in the east. It is commonly known as the The Petrozavodsk phenomenon after the city of Petrozavodsk in Russia (then in the Soviet Union), where a glowing object which showered the city with numerous rays was widely reported. The nature of the phenomenon is disputed.

  • 1996: Mathematician and academic Paul Erdős dies. Erdős firmly believed mathematics to be a social activity, living an itinerant lifestyle with the sole purpose of writing mathematical papers with other mathematicians.

    1996: Mathematician and academic Paul Erdős dies. Erdős firmly believed mathematics to be a social activity, living an itinerant lifestyle with the sole purpose of writing mathematical papers with other mathematicians.

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