Combining Texts
Ideas for
'Set Theory and related topics (2nd ed)', 'Substitutional Classes and Relations' and 'Events as property exemplifications'
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2 ideas
4. Formal Logic / F. Set Theory ST / 3. Types of Set / e. Equivalence classes
8920
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Equivalence relations are reflexive, symmetric and transitive, and classify similar objects [Lipschutz]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / p. Axiom of Reducibility
18130
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Axiom of Reducibility: there is always a function of the lowest possible order in a given level [Russell, by Bostock]
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