assumption
t : Th
Δ : Ctx
b : Lex (ℕ × ℕ)
i j : ℕ
lem : lindenbaumSequence t Δ (i, j) ≤ lindenbaumSequence t Δ (i, j + 1)
a✝ : Form
h₁ : a✝ ∈ lindenbaumSequence t Δ (i, j + 1)
⊢ a✝ ∈ lindenbaumSequence t Δ (i, j + 1)
no goals