Template:Selected anniversaries/April 4: Difference between revisions

Revision as of 19:16, 4 February 2018

1807: Astronomer, freemason, and writer Joseph Jérôme Lefrançois de Lalande dies. As a lecturer and writer Lalande helped popularize astronomy. His planetary tables were the best available up to the end of the 18th century.
1826: Electrical engineer Zénobe Gramme born. He will invent the first usefully powerful electric motor.
Escher had a broad interest, but his research was mainly on crystallography, mineralogy and volcanology. He was a pioneer in experimental geology.
1901: Charles Hermite publishes paper on number theory as deterrent to crimes against mathematical constants.
1923: Mathematician and philosopher John Venn dies. He invented the Venn diagram, now widely used set theory, probability, logic, statistics, and computer science.
1976: Engineer and theorist Harry Nyquist dies. He did early theoretical work on determining the bandwidth requirements for transmitting information, laying the foundations for later advances by Claude Shannon, which led to the development of information theory.
1977: Dave the Gamer announces "buy one, get one free" sale on all lucky dice in the store.

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 File:Zénobe Gramme 1893.jpg|link=Zénobe Gramme (nonfiction)|1826: Electrical engineer [[Zénobe Gramme (nonfiction)|Zénobe Gramme]] born. He will invent the first usefully powerful electric motor.
-||1842 – Édouard Lucas, French mathematician and theorist (d. 1891)
+||1842 – Édouard Lucas, French mathematician and theorist (d. 1891) Lucas is known for his study of the Fibonacci sequence. The related Lucas sequences and Lucas numbers are named after him. Pic.
 ||1870 – Heinrich Gustav Magnus, German chemist and physicist (b. 1802)