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- Subcountability abstract "In constructive mathematics, a collection is subcountable if there exists a partial surjection from the natural numbers onto it. The name derives from the intuitive sense that such a collection is "no bigger" than the counting numbers. The concept is trivial in classical set theory, where a set is subcountable if and only if it is finite or countably infinite. Constructively it is consistent to assert the subcountability of some uncountable collections such as the real numbers. Indeed there are models of the constructive set theory CZF in which all sets are subcountable and models of IZF in which all sets with apartness relations are subcountable.".
- Subcountability wikiPageID "15036487".
- Subcountability wikiPageRevisionID "582355341".
- Subcountability hasPhotoCollection Subcountability.
- Subcountability subject Category:Constructivism_(mathematics).
- Subcountability comment "In constructive mathematics, a collection is subcountable if there exists a partial surjection from the natural numbers onto it. The name derives from the intuitive sense that such a collection is "no bigger" than the counting numbers. The concept is trivial in classical set theory, where a set is subcountable if and only if it is finite or countably infinite. Constructively it is consistent to assert the subcountability of some uncountable collections such as the real numbers.".
- Subcountability label "Subcountability".
- Subcountability sameAs m.03h5gth.
- Subcountability sameAs Q7630981.
- Subcountability sameAs Q7630981.
- Subcountability wasDerivedFrom Subcountability?oldid=582355341.
- Subcountability isPrimaryTopicOf Subcountability.