Template:Selected anniversaries/January 30: Difference between revisions

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||1610: Galileo writes to Belisario Vinta, with notes on his long observation of the moon with a new twenty-power scope. A letter containing much of what was to appear about the Moon in Sidereus Nuncius, two months later. *Drake, Galileo at Work; 1978  https://pballew.blogspot.com/2019/01/on-this-day-in-math-january-30.html
||1610: Galileo writes to Belisario Vinta, with notes on his long observation of the moon with a new twenty-power scope. A letter containing much of what was to appear about the Moon in Sidereus Nuncius, two months later. *Drake, Galileo at Work; 1978  https://pballew.blogspot.com/2019/01/on-this-day-in-math-january-30.html


||1619: Michelangelo Ricci born ... In 1666, he found the tangent lines to the parabolas of Fermat. *VFR Michelangelo Ricci was a friend of Torricelli; in fact both were taught by Benedetti Castelli. He studied theology and law in Rome and at this time he became friends with René de Sluze. It is clear that Sluze, Torricelli and Ricci had a considerable influence on each other in the mathematics which they studied. Ricci made his career in the Church. His income came from the Church, certainly from 1650 he received such funds, but perhaps surprisingly he was never ordained. Ricci served the Pope in several different roles before being made a cardinal by Pope Innocent XI in 1681. Ricci's main work was Exercitatio geometrica, De maximis et minimis (1666) which was later reprinted as an appendix to Nicolaus Mercator's Logarithmo-technia (1668). It only consisted of 19 pages and it is remarkable that his high reputation rests solely on such a short publication. In this work Ricci finds the maximum of xm(a - x)n and the tangents to ym = kxn. The methods are early examples of induction. He also studied spirals (1644), generalised cycloids (1674) and states explicitly that finding tangents and finding areas are inverse operations (1668). *SAU Pic.
File:Michelangelo Ricci.jpg|link=Michelangelo Ricci (nonfiction)|1619: Mathematician and cardinal [[Michelangelo Ricci (nonfiction)|Michelangelo Ricci]] born. Ricci will play a significant part in the theoretical debates and experiments that lead up to Torricelli's discovery of atmospheric pressure and invention of the mercury barometer.


File:Oliver Cromwell by Samuel Cooper.jpg|link=Oliver Cromwell (nonfiction)|1661: [[Oliver Cromwell (nonfiction)|Oliver Cromwell]], Lord Protector of the Commonwealth of England, is ritually executed more than two years after his death, on the 12th anniversary of the execution of the monarch he himself deposed.
File:Oliver Cromwell by Samuel Cooper.jpg|link=Oliver Cromwell (nonfiction)|1661: [[Oliver Cromwell (nonfiction)|Oliver Cromwell]], Lord Protector of the Commonwealth of England, is ritually executed more than two years after his death, on the 12th anniversary of the execution of the monarch he himself deposed.
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||1865: Georg Landsberg born ... mathematician, known for his work in the theory of algebraic functions and on the Riemann–Roch theorem. The Takagi–Landsberg curve, a fractal that is the graph of a nowhere-differentiable but uniformly continuous function, is named after Teiji Takagi and him. Pic: https://commons.wikimedia.org/wiki/File:Georg_Landsberg_(HeidICON_28864).jpg
||1865: Georg Landsberg born ... mathematician, known for his work in the theory of algebraic functions and on the Riemann–Roch theorem. The Takagi–Landsberg curve, a fractal that is the graph of a nowhere-differentiable but uniformly continuous function, is named after Teiji Takagi and him. Pic: https://commons.wikimedia.org/wiki/File:Georg_Landsberg_(HeidICON_28864).jpg
File:Herman_Hollerith.jpg|link=Herman Hollerith (nonfiction)|1884: Inventor [[Herman Hollerith (nonfiction)|Herman Hollerith]] invents new type of [[scrying engine]] which generates images from residual consciousness in the severed head of [[Oliver Cromwell (nonfiction)|Oliver Cromwell]].


||1894: Moritz Abraham Stern dies ... mathematician. Stern was interested in primes that cannot be expressed as the sum of a prime and twice a square (now known as Stern primes). He is known for formulating Stern's diatomic series, which counts the number of ways to write a number as a sum of powers of two with no power used more than twice. Pic.
||1894: Moritz Abraham Stern dies ... mathematician. Stern was interested in primes that cannot be expressed as the sum of a prime and twice a square (now known as Stern primes). He is known for formulating Stern's diatomic series, which counts the number of ways to write a number as a sum of powers of two with no power used more than twice. Pic.

Revision as of 08:05, 30 January 2020

  • 1619: Mathematician and cardinal Michelangelo Ricci born. Ricci will play a significant part in the theoretical debates and experiments that lead up to Torricelli's discovery of atmospheric pressure and invention of the mercury barometer.

    1619: Mathematician and cardinal Michelangelo Ricci born. Ricci will play a significant part in the theoretical debates and experiments that lead up to Torricelli's discovery of atmospheric pressure and invention of the mercury barometer.

  • 1661: Oliver Cromwell, Lord Protector of the Commonwealth of England, is ritually executed more than two years after his death, on the 12th anniversary of the execution of the monarch he himself deposed.

    1661: Oliver Cromwell, Lord Protector of the Commonwealth of England, is ritually executed more than two years after his death, on the 12th anniversary of the execution of the monarch he himself deposed.

  • 1661: Mathematician William Oughtred uses Gnomon algorithm functions to extract data from the severed head of Oliver Cromwell.

    1661: Mathematician William Oughtred uses Gnomon algorithm functions to extract data from the severed head of Oliver Cromwell.

  • 1736: inventor, engineer, and chemist James Watt born. He will make major improvements to the steam engine.

    1736: inventor, engineer, and chemist James Watt born. He will make major improvements to the steam engine.

  • 1830: In a letter to Laplace, Carl Friedrich Gauss writes about a "curious problem" that he had been working on for twelve years. He gives the limiting value of the frequency of distribution of positive integers in the continued fraction of a random number (now called the Gauss-Kuzmin Distribution) as log2(1+x) . Gauss then asks if Laplace can offer help in finding the error term.

    1830: In a letter to Laplace, Carl Friedrich Gauss writes about a "curious problem" that he had been working on for twelve years. He gives the limiting value of the frequency of distribution of positive integers in the continued fraction of a random number (now called the Gauss-Kuzmin Distribution) as log2(1+x) . Gauss then asks if Laplace can offer help in finding the error term.

  • 1975: The Monitor National Marine Sanctuary is established as the first United States National Marine Sanctuary.

    1975: The Monitor National Marine Sanctuary is established as the first United States National Marine Sanctuary.

  • 1976: Comic book artist and crime-fighter Gil Kane publishes illustrated history of math crimes throughout history.

    1976: Comic book artist and crime-fighter Gil Kane publishes illustrated history of math crimes throughout history.

  • 1998: Mathematician Samuel Eilenberg dies. He co-founded category theory with Saunders Mac Lane, and proposed the Eilenberg swindle (a construction applying the telescoping cancellation idea to projective modules).

    1998: Mathematician Samuel Eilenberg dies. He co-founded category theory with Saunders Mac Lane, and proposed the Eilenberg swindle (a construction applying the telescoping cancellation idea to projective modules).

  • 2010: Flow Chart voted Picture of the Day by the citizens of New Minneapolis, Canada.

    2010: Flow Chart voted Picture of the Day by the citizens of New Minneapolis, Canada.

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