Template:Selected anniversaries/October 21: Difference between revisions
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||1687 – Nicolaus I Bernoulli, Swiss mathematician and theorist (d. 1759) | ||1687 – Nicolaus I Bernoulli, Swiss mathematician and theorist (d. 1759) | ||
||Enrico Betti (b. 21 October 1823) was an Italian mathematician, now remembered mostly for his 1871 paper on topology that led to the later naming after him of the Betti numbers. | |||
||1833 – Alfred Nobel, Swedish chemist and engineer, invented dynamite and founded the Nobel Prize (d. 1896) | ||1833 – Alfred Nobel, Swedish chemist and engineer, invented dynamite and founded the Nobel Prize (d. 1896) | ||
Revision as of 18:44, 5 November 2017
1914: Mathematics and science writer Martin Gardner born. His interests will include stage magic, scientific skepticism, philosophy, religion, and literature.
1958: National Pareidolia Day declared in the United States.
1969: Mathematician and academic Wacław Sierpiński dies. He made important contributions to set theory (research on the axiom of choice and the continuum hypothesis), number theory, theory of functions, and topology.
2017: Green Spiral 9 feels more green than ever, according to new chromatographic analysis.