Template:Selected anniversaries/October 21: Difference between revisions
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||1558 – Julius Caesar Scaliger, Italian physician and scholar (b. 1484) | ||1558 – Julius Caesar Scaliger, Italian physician and scholar (b. 1484) | ||
||1687 | File:Nicolaus I Bernoulli.jpg|link=Nicolaus I Bernoulli (nonfiction)|1687: Mathematician and theorist [[Nicolaus I Bernoulli (nonfiction)|Nicolaus I Bernoulli]] born. He will introduce a successful resolution to the [[St. Petersburg paradox (nonfiction)|St. Petersburg paradox]]. | ||
||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. | ||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. | ||
Revision as of 16:11, 14 November 2017
1687: Mathematician and theorist Nicolaus I Bernoulli born. He will introduce a successful resolution to the St. Petersburg paradox.
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.