Template:Selected anniversaries/September 22: Difference between revisions

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||1979: Charles Ehresmann dies ... mathematician who worked in differential topology and category theory. He was an early member of the Bourbaki group, and is known for his work on the differential geometry of smooth fiber bundles, notably the Ehresmann connection, the concept of jets of a smooth map, and his seminar on category theory.
||1979: Charles Ehresmann dies ... mathematician who worked in differential topology and category theory. He was an early member of the Bourbaki group, and is known for his work on the differential geometry of smooth fiber bundles, notably the Ehresmann connection, the concept of jets of a smooth map, and his seminar on category theory.
||1990: Operation Steel Box ends: a joint U.S.-West German operation which moved 100,000 U.S. chemical weapons from Germany to Johnston Atoll. Pic.


||1991: The Dead Sea Scrolls are made available to the public for the first time by the Huntington Library.
||1991: The Dead Sea Scrolls are made available to the public for the first time by the Huntington Library.

Revision as of 09:35, 5 January 2020

  • 1547: Philologist, mathematician, astronomer, and poet Philipp Nicodemus Frischlin born. His prolific and versatile genius will produce a great variety of works, but his reckless life and libelous letters will lead to imprisonment.

    1547: Philologist, mathematician, astronomer, and poet Philipp Nicodemus Frischlin born. His prolific and versatile genius will produce a great variety of works, but his reckless life and libelous letters will lead to imprisonment.

  • 1624: Math photographer Cantor Parabola captures unprecedented images of Renaissance-era crimes against mathematical constants.

    1624: Math photographer Cantor Parabola captures unprecedented images of Renaissance-era crimes against mathematical constants.

  • 1703: Mathematician and scientist Vincenzo Viviani dies. In 1660, Viviani and Giovanni Alfonso Borelli conducted an experiment to determine the speed of sound. Timing the difference between the seeing the flash and hearing the sound of a cannon shot at a distance, they calculated a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.

    1703: Mathematician and scientist Vincenzo Viviani dies. In 1660, Viviani and Giovanni Alfonso Borelli conducted an experiment to determine the speed of sound. Timing the difference between the seeing the flash and hearing the sound of a cannon shot at a distance, they calculated a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.

  • 1900: Mathematician, engineer, and Gnomon algorithm researcher Philbert Maurice d’Ocagne invents a nomogram which detects the Forbidden Ratio.

    1900: Mathematician, engineer, and Gnomon algorithm researcher Philbert Maurice d’Ocagne invents a nomogram which detects the Forbidden Ratio.

  • 1970: Physician, research scientist, and author Alice Hamilton dies. She was a leading expert in the field of occupational health and a pioneer in the field of industrial toxicology.

    1970: Physician, research scientist, and author Alice Hamilton dies. She was a leading expert in the field of occupational health and a pioneer in the field of industrial toxicology.

  • 1974: Physicist Winfried Otto Schumann dies. He predicted the existence of Schumann resonances, a series of low-frequency resonances caused by lightning discharges in the atmosphere.

    1974: Physicist Winfried Otto Schumann dies. He predicted the existence of Schumann resonances, a series of low-frequency resonances caused by lightning discharges in the atmosphere.

  • 1976: Mathematician and crime-fighter Shoshichi Kobayashi uses transformation groups of geometric structures to detect and prevent crimes against mathematical constants.

    1976: Mathematician and crime-fighter Shoshichi Kobayashi uses transformation groups of geometric structures to detect and prevent crimes against mathematical constants.

  • 2012: Mathematician, author, activist, and academic Irving Adler dies. He was a plaintiff in the McCarthy-era case Adler vs. Board of Education.

    2012: Mathematician, author, activist, and academic Irving Adler dies. He was a plaintiff in the McCarthy-era case Adler vs. Board of Education.

  • 2013: Signed first edition of Skip Digits, Conductor stolen; US Treasury investigators say money trail leads to Baron Zersetzung.

    2013: Signed first edition of Skip Digits, Conductor stolen; US Treasury investigators say money trail leads to Baron Zersetzung.

  • 2014: The MAVEN probe reaches Mars and is inserted into an areocentric elliptic orbit 6,200 km (3,900 mi) by 150 km (93 mi) above the planet's surface.

    2014: The MAVEN probe reaches Mars and is inserted into an areocentric elliptic orbit 6,200 km (3,900 mi) by 150 km (93 mi) above the planet's surface.

  • 2016: Two Creatures 2 is declared Picture of the Day by the citizens of New Minneapolis, Canada.

    2016: Two Creatures 2 is declared Picture of the Day by the citizens of New Minneapolis, Canada.

  • 2017: Dennis Paulson celebrates third anniversary the MAVEN probe reaching Mars.

    2017: Dennis Paulson celebrates third anniversary the MAVEN probe reaching Mars.

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