cases hh
case mpr
α : Type u_1
β : Type ?u.8604
xs✝ : List1.IndView α
ys : List1 α
x : α
xs : List1.IndView α
y head✝ : α
tail✝ : List α
hh : y = x
ht : (List1.cons head✝ tail✝).toIndView = xs
⊢ List1.cons x xs.toList1.toList = List1.cons y (List1.cons head✝ tail✝).toList
case mpr.refl
α : Type u_1
β : Type ?u.8604
xs✝ : List1.IndView α
ys : List1 α
x : α
xs : List1.IndView α
head✝ : α
tail✝ : List α
ht : (List1.cons head✝ tail✝).toIndView = xs
⊢ List1.cons x xs.toList1.toList = List1.cons x (List1.cons head✝ tail✝).toList