S (set theory)
http://dbpedia.org/resource/S_(set_theory) an entity of type: Work
S is an axiomatic set theory set out by George Boolos in his 1989 article, "Iteration Again". S, a first-order theory, is two-sorted because its ontology includes “stages” as well as sets. Boolos designed S to embody his understanding of the “iterative conception of set“ and the associated iterative hierarchy. S has the important property that all axioms of Zermelo set theory Z, except the axiom of extensionality and the axiom of choice, are theorems of S or a slight modification thereof.
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S (set theory)
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31080143
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1081892912
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S is an axiomatic set theory set out by George Boolos in his 1989 article, "Iteration Again". S, a first-order theory, is two-sorted because its ontology includes “stages” as well as sets. Boolos designed S to embody his understanding of the “iterative conception of set“ and the associated iterative hierarchy. S has the important property that all axioms of Zermelo set theory Z, except the axiom of extensionality and the axiom of choice, are theorems of S or a slight modification thereof.
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9253