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Results tagged with lo.logic
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user 202
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.
3
votes
2
answers
172
views
Real-closed fields minus existentials for Presburger-like power and multiplication?
I was reading these slides by John Harrison, and was struck by the comment at the end about the universal fragment of real-closed fields needing nothing more than the axioms for an (ordered) integral …
- 177
3
votes
1
answer
1k
views
Proving inequalities over algebraic structures
I've been looking at proof techniques in formal systems like Coq and Agda recently, and encountered the newring tactic described here for proving equalities over arbitrary (semi)rings. It does this by …
- 177