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In mathematical logic, Russell's paradox (also known as Russell's antinomy) is a set-theoretic paradox published by the British philosopher and mathematician, Bertrand Russell, in 1901. [ 1 ] [ 2 ] Russell's paradox shows that every set theory that contains an unrestricted comprehension principle leads to contradictions. [ 3 ]
Russell & Company of Massillon, Ohio, are best known for manufacturing farm and railroad machinery in the late 19th and early 20th centuries. They built 18,000 steam tractors and stationary engines and 22,000 threshing machines .
R — H.C. Russell (double stars) Raab (open star clusters) RAFGL — Revised Air Force Geophysical Laboratory (four color infrared sky survey) Raymond — (telescopic asterisms) RBC — Revised Bologna Catalogue (for example: globular cluster RBC EXT8 in Messier 31; the Andromeda Galaxy) RBS — Rosat Bright Survey (bright X-ray sources)
Russell supervised the preparation of the portion of the Astrographic Catalogue undertaken by the Sydney observatory until his retirement. In 1888 he was elected president of the newly formed Australasian Association for the Advancement of Science and in 1891 became vice-chancellor of the university of Sydney, but resigned within a year on ...
The Hertzsprung–Russell diagram (abbreviated as H–R diagram, HR diagram or HRD) is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities and their stellar classifications or effective temperatures.
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