Template:Selected anniversaries/December 20: Difference between revisions
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||Dr. Cyril Andrew Ponnamperuma (d. 20 December 1994) was a Sri Lankan scientist in the fields of chemical evolution and the origin of life. | ||Dr. Cyril Andrew Ponnamperuma (d. 20 December 1994) was a Sri Lankan scientist in the fields of chemical evolution and the origin of life. | ||
||Paris Christos Kanellakis (d. December 20, 1995) was a Greek American computer scientist. His scientific contributions lie in the fields of database theory—comprising work on deductive databases, object-oriented databases, and constraint databases—as well as in fault-tolerant distributed computation and in type theory. Pic. | |||
||1996 – Carl Sagan, American astronomer, astrophysicist, and cosmologist (b. 1934) | ||1996 – Carl Sagan, American astronomer, astrophysicist, and cosmologist (b. 1934) | ||
Revision as of 20:00, 9 April 2018
1494: Mathematician and cartographer Oronce Finé born. He will be imprisoned in 1524, probably for practicing judicial astrology.
1757: Joseph Marie Jacquard uses punched-card technology to compute and prevent crimes against mathematical constants.
1901: Physicist Robert J. Van de Graaff born. He will design design and construct high-voltage Van de Graaff generators.
1922: Hilbert curve prevents crime against mathematical constants.
1951: The EBR-1 in Arco, Idaho becomes the first nuclear power plant to generate electricity. The electricity powered four light bulbs.
1962: Mathematician Emil Artin dies. He worked on algebraic number theory, contributing to class field theory and a new construction of L-functions. He also contributed to the pure theories of rings, groups and fields.