FirstOrder.Language.Theory.iff_iff_imp_and_imp

∀ {L : FirstOrder.Language} {T : L.Theory} {α : Type w} {n : ℕ} {φ ψ : L.BoundedFormula α n},
  T.Iff φ ψ ↔ T.Imp φ ψ ∧ T.Imp ψ φ

Defined in: Mathlib.ModelTheory.Equivalence
Cited by: 3 results in Mathlib
Foundations: Depth 27 from the axioms · uses propext, Classical.choice, Quot.sound

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