Theorem: LO.Modal.Standard.Kripke.CanonicalModel.frame_def (Logic/Modal/Standard/Kripke/Completeness.lean)

State before:
α : Type u_1
inst✝³ : DecidableEq α
inst✝² : Inhabited α
L : DeductionParameter α
inst✝¹ : L.Normal
inst✝ : Inhabited (MCT L)
Ω₁ Ω₂ : (CanonicalModel L).Frame.World
⊢ (CanonicalModel L).Frame.Rel Ω₁ Ω₂ ↔ □''⁻¹Ω₁.theory ⊆ Ω₂.theory
Tactic:
rfl
State after:
no goals