Combining Texts
Ideas for
'The Fixation of Belief', 'Structures and Structuralism in Phil of Maths' and 'Principles of Theoretical Logic'
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2 ideas
4. Formal Logic / C. Predicate Calculus PC / 1. Predicate Calculus PC
17750
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The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / a. Axioms for sets
10166
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ZFC set theory has only 'pure' sets, without 'urelements' [Reck/Price]
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