Template:Selected anniversaries/April 5: Difference between revisions

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File:Wallace War-Heels.jpg|link=Wallace War-Heels|1870: Adventurer [[Wallace War-Heels]] publishes autobiography.
File:Wallace War-Heels.jpg|link=Wallace War-Heels|1870: Adventurer [[Wallace War-Heels]] publishes autobiography.
||1877: Georg Faber born ... Faber's most important work was on the polynomial expansion of functions. This is the problem of expanding an analytical function in an area bounded by a smooth curve as a sum of polynomials, where the polynomials are determined by the area. These polynomials are now known as 'Faber polynomials' and first appear in Faber's 1903 paper Über polynomische Entwickelungen published in Mathematische Annalen. Another important paper which he also published in Mathematische Annalen, this time in 1909, was Über stetige Funktionen. In this paper he introduced the 'hierarchical basis' and explicitly used it for the representation of functions. In fact Faber was building on the idea of Archimedes who computed approximately using a hierarchy of polygonal approximations of a circle. Only in the 1980s was Faber's idea seen to be an important ingredient for the efficient solution of partial differential equations. One further achievement of Faber is worthy of mention. In 1894 Lord Rayleigh made the following claim:" ... given a fixed area of ox-hide to make a drum, the ground tone is lowest if you make your drum circular. " Two mathematicians independently verified Rayleigh's conjecture, Faber and Edgar Krahn. *SAU  Pic search: https://www.google.com/search?q=georg+faber+mathematician


||1881: Hermann von Helmholtz presented The Faraday Lecture before the Fellows of the Chemical Society in London. His topic was The Modern Development of Faraday's Conception of Electricity. Helmholtz recognized Michael Faraday as being the person who most advanced the general scientific method, saying “His principal aim was to express in his new conceptions only facts, with the least possible use of hypothetical substances and forces.” *TIS  https://pballew.blogspot.com/2019/04/on-this-day-in-math-april-5.html
||1881: Hermann von Helmholtz presented The Faraday Lecture before the Fellows of the Chemical Society in London. His topic was The Modern Development of Faraday's Conception of Electricity. Helmholtz recognized Michael Faraday as being the person who most advanced the general scientific method, saying “His principal aim was to express in his new conceptions only facts, with the least possible use of hypothetical substances and forces.” *TIS  https://pballew.blogspot.com/2019/04/on-this-day-in-math-april-5.html

Revision as of 09:43, 5 April 2019

  • 1523: Cryptographer and diplomat Blaise de Vigenère (nonfiction) born. The Vigenère cipher will be misattributed to him; Vigenère himself will devise a different, stronger cipher.

    1523: Cryptographer and diplomat Blaise de Vigenère (nonfiction) born. The Vigenère cipher will be misattributed to him; Vigenère himself will devise a different, stronger cipher.

  • 1622: Mathematician and scientist Vincenzo Viviani born. In 1660, Viviani and Giovanni Alfonso Borelli will conduct 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 will calculate a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.

    1622: Mathematician and scientist Vincenzo Viviani born. In 1660, Viviani and Giovanni Alfonso Borelli will conduct 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 will calculate a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.

  • 1827: Surgeon and scientist Joseph Lister born. He will pioneer antiseptic surgery, performing the first antiseptic surgery in 1865.

    1827: Surgeon and scientist Joseph Lister born. He will pioneer antiseptic surgery, performing the first antiseptic surgery in 1865.

  • 1869: Physicist, mathematician, and engineer Sergey Chaplygin born. He will be known for mathematical formulas such as Chaplygin's equation, and for a hypothetical substance in cosmology called Chaplygin gas, named after him.

    1869: Physicist, mathematician, and engineer Sergey Chaplygin born. He will be known for mathematical formulas such as Chaplygin's equation, and for a hypothetical substance in cosmology called Chaplygin gas, named after him.

  • 1870: Adventurer Wallace War-Heels publishes autobiography.

    1870: Adventurer Wallace War-Heels publishes autobiography.

  • 1900: Mathematician, economist, and academic Joseph Louis François Bertrand dies. He worked in the fields of number theory, differential geometry, probability theory, economics and thermodynamics.

    1900: Mathematician, economist, and academic Joseph Louis François Bertrand dies. He worked in the fields of number theory, differential geometry, probability theory, economics and thermodynamics.

  • 1910: Havelock and Nikola Tesla share Nobel Prize in Physics for research into electrical field modulation and data transmission.

    1910: Havelock and Nikola Tesla share Nobel Prize in Physics for research into electrical field modulation and data transmission.

  • 1976: Businessman, investor, aviator, film director, and philanthropist Howard Hughes dies. He was known during his lifetime as one of the most financially successful individuals in the world.

    1976: Businessman, investor, aviator, film director, and philanthropist Howard Hughes dies. He was known during his lifetime as one of the most financially successful individuals in the world.

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