Template:Selected anniversaries/May 15: Difference between revisions

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File:Thomas Fincke.jpg|link=Thomas Fincke (nonfiction)|1579: Mathematician and physicist [[Thomas Fincke (nonfiction)|Thomas Fincke]] invents new type of [[scrying engine]] which pre-visualizes tangents and secants. He will use the engine to detect and expose [[crimes against mathematical constants]].


File:Johannes Kepler 1610.jpg|link=Johannes Kepler (nonfiction)|1618: [[Johannes Kepler (nonfiction)|Johannes Kepler]] confirms his previously rejected discovery of the third law of planetary motion (he first discovered it on March 8 but soon rejected the idea after some initial calculations were made).
File:Johannes Kepler 1610.jpg|link=Johannes Kepler (nonfiction)|1618: [[Johannes Kepler (nonfiction)|Johannes Kepler]] confirms his previously rejected discovery of the third law of planetary motion (he first discovered it on March 8 but soon rejected the idea after some initial calculations were made).
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||1993: Herbert Grötzsch dies ... mathematician. He was born in Döbeln and died in Halle. Grötzsch worked in graph theory. He was the discoverer and eponym of the Grötzsch graph, a triangle-free graph that requires four colors in any graph coloring, and Grötzsch's theorem, the result that every triangle-free planar graph requires at most three colors. Pic.
||1993: Herbert Grötzsch dies ... mathematician. He was born in Döbeln and died in Halle. Grötzsch worked in graph theory. He was the discoverer and eponym of the Grötzsch graph, a triangle-free graph that requires four colors in any graph coloring, and Grötzsch's theorem, the result that every triangle-free planar graph requires at most three colors. Pic.


File:Three Kings.jpg|link=Three Kings (nonfiction)|2017: ''[[Three Kings (nonfiction)|Three Kings]]'' voted Picture of the Day by the citizens of [[New Minneapolis, Canada]].
File:Greedy colorings.svg|link=Greedy coloring (nonfiction)|2019: New study says that [[Greedy coloring (nonfiction)|Greedy coloring algorithms]] "have been systematically corrupted by a consortium of [[math criminals]] including [[Anarchimedes]] and [[Forbidden Ratio]]." (Source: [[APTO]] crime report.)


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Revision as of 23:47, 26 January 2022

  • 1618: Johannes Kepler confirms his previously rejected discovery of the third law of planetary motion (he first discovered it on March 8 but soon rejected the idea after some initial calculations were made).

    1618: Johannes Kepler confirms his previously rejected discovery of the third law of planetary motion (he first discovered it on March 8 but soon rejected the idea after some initial calculations were made).

  • 1801: Mathematician Joseph Ludwig Raabe born. He will discover Raabe's ratio test, which determines the convergence or divergence of an infinite series, in some cases.

    1801: Mathematician Joseph Ludwig Raabe born. He will discover Raabe's ratio test, which determines the convergence or divergence of an infinite series, in some cases.

  • 1836: Astronomer Francis Baily observes "Baily's beads" during an annular eclipse.

    1836: Astronomer Francis Baily observes "Baily's beads" during an annular eclipse.

  • 1864: Asclepius Myrmidon Prepares for Emergency Field Surgery incorporated into army medical manuals on both sides of the American Civil War.

    1864: Asclepius Myrmidon Prepares for Emergency Field Surgery incorporated into army medical manuals on both sides of the American Civil War.

  • 1973: Cryptologist Laurance Safford born. Safford established the Naval cryptologic organization after World War I, and headed the effort more or less constantly until shortly after the Japanese attack on Pearl Harbor.

    1973: Cryptologist Laurance Safford born. Safford established the Naval cryptologic organization after World War I, and headed the effort more or less constantly until shortly after the Japanese attack on Pearl Harbor.

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