Combining Texts
Ideas for
'works', 'Symbolic Reasoning' and 'Foundations without Foundationalism'
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9 ideas
4. Formal Logic / A. Syllogistic Logic / 1. Aristotelian Logic
13643
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Aristotelian logic is complete [Shapiro]
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4. Formal Logic / F. Set Theory ST / 3. Types of Set / a. Types of set
13651
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A set is 'transitive' if contains every member of each of its members [Shapiro]
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4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set
21548
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The null class is the class with all the non-existents as its members [MacColl, by Lackey]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / j. Axiom of Choice IX
13647
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Choice is essential for proving downward Löwenheim-Skolem [Shapiro]
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4. Formal Logic / F. Set Theory ST / 5. Conceptions of Set / a. Sets as existing
13631
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Are sets part of logic, or part of mathematics? [Shapiro]
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4. Formal Logic / F. Set Theory ST / 5. Conceptions of Set / e. Iterative sets
13654
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It is central to the iterative conception that membership is well-founded, with no infinite descending chains [Shapiro]
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13640
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Russell's paradox shows that there are classes which are not iterative sets [Shapiro]
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13666
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Iterative sets are not Boolean; the complement of an iterative set is not an iterative sets [Shapiro]
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4. Formal Logic / F. Set Theory ST / 6. Ordering in Sets
13653
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'Well-ordering' of a set is an irreflexive, transitive, and binary relation with a least element [Shapiro]
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