assumption
case intro.intro
ι : Type u_2
F : Type u_1
inst✝¹ : UnaryModalOperator ι F
inst✝ : DecidableEq F
i : ι
n : ℕ
p q : F
s t : Set F
h : s ⊆ Set.premultimop i n t
w✝ : F
h₁ : w✝ ∈ Set.premultimop i n t
hp : (mop i)^[n] w✝ ∈ Set.multimop i n s
⊢ (mop i)^[n] w✝ ∈ t
no goals