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Theorem first_order.language.Theory.semantically_equivalent_not_not

Modification history

2022-02-22 20:21
src/model_theory/terms_and_formulas.lean
refactor(model_theory/terms_and_formulas): Improvements to basics of first-order formulas (#12091) …
Deleted first_order.language.Theory.semantically_equivalent_not_notView on Github →
2022-02-16 11:53
src/model_theory/terms_and_formulas.lean
feat(model_theory/terms_and_formulas): Define satisfiability and semantic equivalence of formulas (#11928) …
Added first_order.language.Theory.semantically_equivalent_not_notView on Github →