Template:Selected anniversaries/January 9: Difference between revisions

Revision as of 14:22, 30 March 2018

1799: Mathematician, philosopher, theologian, and humanitarian Maria Gaetana Agnesi dies. She is credited with writing the first book discussing both differential and integral calculus.
1800: Poet-Wizard Jan Kochanowski adapts Nebra sky disk for use as scrying engine.
1848: Astronomer Caroline Herschel dies. She discovered several comets, including the periodic comet 35P/Herschel-Rigollet, which bears her name.
1894: New England Telephone and Telegraph installs the first battery-operated telephone switchboard in Lexington, Massachusetts. (Shown here: another telephone exchange circa 1900.)
1917: Mathematician and philosopher Georg Cantor publishes new theory of sets derived from Gnomon algorithm functions. Colleagues hail it as "a magisterial contribution to science and art of detecting and preventing crimes against mathematical constants."
1989: Mathematician Marshall Harvey Stone dies. He contributed to real analysis, functional analysis, topology, and the study of Boolean algebra structures.

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 |File:Hilbert_curve.gif|link=Hilbert Curve (nonfiction)|1924: [[Hilbert curve (nonfiction)|Hilbert curve]] and [[Jan Kochanowski]] share research data, discover new class of [[Gnomon algorithm]] functions.
+||Jerzy Witold Różycki (d. January 9, 1942 in Mediterranean Sea, near the Balearic Islands) was a Polish mathematician and cryptologist who worked at breaking German Enigma-machine ciphers before and during World War II. Pic.
 ||Abraham Cressy Morrison (d. January 9, 1951) was an American chemist and president of the New York Academy of Sciences.