Theorem: LO.Modal.Standard.Formula.Kripke.Satisfies.box_def (Logic/Modal/Standard/Kripke/Semantics.lean)

State before:
α : Type u_1
M : Model α
w : M.World
p q : Formula α
⊢ Satisfies M w (□p) ↔ ∀ (w' : M.Frame.World), w ≺ w' → Satisfies M w' p
Tactic:
simp [Satisfies]
State after:
no goals