Template:Selected anniversaries/January 24: Difference between revisions
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File:Cosmos-954 debris.png|link=Kosmos 954 (nonfiction)|1978: Soviet satellite [[Kosmos 954 (nonfiction)|Kosmos 954]], with a nuclear reactor on board, burns up in Earth's atmosphere, scattering radioactive debris over Canada's Northwest Territories. Only 1% is recovered. | File:Cosmos-954 debris.png|link=Kosmos 954 (nonfiction)|1978: Soviet satellite [[Kosmos 954 (nonfiction)|Kosmos 954]], with a nuclear reactor on board, burns up in Earth's atmosphere, scattering radioactive debris over Canada's Northwest Territories. Only 1% is recovered. | ||
||Karol Borsuk (d. January 24, 1982) was a Polish mathematician. His main interest was topology. Borsuk introduced the theory of absolute retracts (ARs) and absolute neighborhood retracts (ANRs), and the cohomotopy groups, later called Borsuk–Spanier cohomotopy groups. He also founded Shape theory. He has constructed various beautiful examples of topological spaces, e.g. an acyclic, 3-dimensional continuum which admits a fixed point free homeomorphism onto itself; also 2-dimensional, contractible polyhedra which have no free edge. His topological and geometric conjectures and themes stimulated research for more than half a century. | |||
||1988 – Werner Fenchel, German-Danish mathematician and academic (b. 1905) | ||1988 – Werner Fenchel, German-Danish mathematician and academic (b. 1905) | ||
Revision as of 21:29, 27 November 2017
1201: Canterbury scrying engine retrofitted with Gnomon algorithm routines.
1569: Astronomer Tycho Brahe uses Gnomon algorithm functions make improved astronomical observations.
1961: Goldsboro B-52 crash: A bomber carrying two H-bombs breaks up in mid-air over North Carolina. The uranium core of one weapon remains lost.
1972: New evidence suggests that The Eel Escapes Hydrolab is based on actual events.
1978: Soviet satellite Kosmos 954, with a nuclear reactor on board, burns up in Earth's atmosphere, scattering radioactive debris over Canada's Northwest Territories. Only 1% is recovered.
2016: John Hoyland's Lebanon stolen in broad daylight by supervillain Gnotilus.
2016: Cognitive scientist and artificial intelligence researcher Marvin Minsky dies.
2016: Advances in zero-knowledge proof theory "are central to the problem of mathematical reliability," says mathematician and crime-fighter Alice Beta.