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Results tagged with lo.logic
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user 100473
first-order and higher-order logic, model theory, set theory, proof theory, computability theory, formal languages, definability, interplay of syntax and semantics, constructive logic, intuitionism, philosophical logic, modal logic, completeness, Gödel incompleteness, decidability, undecidability, theories of truth, truth revision, consistency.
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Number of ZFC proofs and are meta-proofs valid ZFC proofs [closed]
How many proofs in the language of ZFC are there? I would say countably infinite, since every proof is a finite sequence of symbols over a finite alphabet (e.g. ASCII).
Consider the proof in https:// …
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