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15. Special subset collections
15.1 Moore's collections
Definition (Moore's subset collection (1908)). In a nonempty set E, a Moore's subset collection, denoted , is a collection of nonempty subsets of E containing E and stable at ensemblistic intersections of nonempty members (Moore, 1908) (p. 267 of , p. 244 of , p. 145 and...
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Special subset collections
Rings and sigma-rings of subsets
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