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Skolem's Paradox
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High Quality Content by WIKIPEDIA articles! In mathematical logic and philosophy, Skolem's paradox is a seeming contradiction that arises from the downward Löwenheim-Skolem theorem. Thoralf Skolem (1922) was the first to discuss the seemingly contradictory aspects of the theorem, and to discover the relativity of set-theoretic notions now known as non-absoluteness. Although it is not an actual antinomy like Russell's paradox, the result is typically called a paradox, and was described as a "paradoxical state of affairs" by Skolem (1922: p. 295). Skolem's paradox is that every countable axiomatisation of set theory in first-order logic, if it is consistent, has a model that is countable. This appears contradictory because it is possible to prove, from those same axioms, a sentence which intuitively says that there exist sets that are not countable. Thus the seeming contradiction is that a model which is itself countable, and which contains only countable sets, satisfies the first order sentence that intuitively states "there are uncountable sets".
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786131168048
- Editor Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
- EAN 9786131168048
- Format Fachbuch
- Titel Skolem's Paradox
- Herausgeber Betascript Publishing
- Anzahl Seiten 88
- Genre Mathematik
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