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Theorem first_order.language.substructure.skolem₁_reduct_is_elementary

Modification history

2022-05-05 22:29
src/model_theory/skolem.lean
feat(model_theory/skolem): Downward Löwenheim–Skolem (#13723) …
Modified first_order.language.substructure.skolem₁_reduct_is_elementaryView on Github →
2022-04-13 10:56
src/model_theory/skolem.lean
feat(model_theory/skolem, satisfiability): A weak Downward Loewenheim Skolem (#13141) …
Added first_order.language.substructure.skolem₁_reduct_is_elementaryView on Github →