ext n
α β α' β' : Type
γ : β → Type
⊢ zeroSeq = propagate Empty.elim (fun x x => (Empty.elim, false)) Empty.elim
case h
α β α' β' : Type
γ : β → Type
n : ℕ
⊢ zeroSeq n = propagate Empty.elim (fun x x => (Empty.elim, false)) Empty.elim n