Template:Selected anniversaries/August 4: Difference between revisions
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||1926 – George Irving Bell, American physicist, biologist, and mountaineer (d. 2000) | ||1926 – George Irving Bell, American physicist, biologist, and mountaineer (d. 2000) | ||
||Daniel Marinus Kan (b. August 4, 1927) was a Jewish mathematician working in homotopy theory. Pic. | |||
||Carl Auer von Welsbach (d. 4 August 1929) was an Austrian scientist and inventor, who had a talent not only for discovering advances, but also for turning them into commercially successful products. He is particularly well known for his work on rare-earth elements, which led to the development of the flint used in modern lighters, the gas mantle, which brought light to the streets of Europe in the late 19th century, and for the development of the metal-filament light bulb. | ||Carl Auer von Welsbach (d. 4 August 1929) was an Austrian scientist and inventor, who had a talent not only for discovering advances, but also for turning them into commercially successful products. He is particularly well known for his work on rare-earth elements, which led to the development of the flint used in modern lighters, the gas mantle, which brought light to the streets of Europe in the late 19th century, and for the development of the metal-filament light bulb. | ||
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||2007 – NASA's Phoenix spacecraft is launched. | ||2007 – NASA's Phoenix spacecraft is launched. | ||
||Daniel Marinus Kan (d. August 4, 2013) was a Jewish mathematician working in homotopy theory. Pic. | |||
File:The Shovel.jpg|link=The Shovel|2016: ''[[The Shovel]]'' depicts [[The Custodian]] in the act of reversing contract violations by [[Egon Rhodomunde]] and [[Baron Zersetzung]]. | File:The Shovel.jpg|link=The Shovel|2016: ''[[The Shovel]]'' depicts [[The Custodian]] in the act of reversing contract violations by [[Egon Rhodomunde]] and [[Baron Zersetzung]]. | ||
Revision as of 08:01, 24 March 2018
1805: Physicist, astronomer, and mathematician William Rowan Hamilton born. He will make important contributions to classical mechanics, optics, and algebra, inventing the quaternion.
1833: Physicist and mathematician André-Marie Ampère uses principles of electromagnetism, which he referred to as "electrodynamics", to detect and prevent crimes against mathematical constants.
1834: Mathematician and philosopher John Venn born. He will invent the Venn diagram, now widely used set theory, probability, logic, statistics, and computer science.
2016: The Shovel depicts The Custodian in the act of reversing contract violations by Egon Rhodomunde and Baron Zersetzung.
2017: Quaternion multiplication table sells for five hundred thousand dollars.