change lindenbaumSequence t Δ (i, a) ≤ lindenbaumSequence t Δ (i, b)
t : Th
Δ : Ctx
i a b : ℕ
h₁ : a ≤ b
⊢ (fun j => lindenbaumSequence t Δ (i, j)) a ≤ (fun j => lindenbaumSequence t Δ (i, j)) b
t : Th
Δ : Ctx
i a b : ℕ
h₁ : a ≤ b
⊢ lindenbaumSequence t Δ (i, a) ≤ lindenbaumSequence t Δ (i, b)