apply xs_ih ys_tl h1_right
α β : Type
inst✝ : DecidableEq α
f : α → β
v xs_hd : α
xs_tl : List α
xs_ih : ∀ (ys : List β), v ∉ xs_tl → updateListITE f xs_tl ys v = f v
ys_hd : β
ys_tl : List β
c1 : ¬v = xs_hd
h1_left : v ≠ xs_hd
h1_right : v ∉ xs_tl
⊢ updateListITE f xs_tl ys_tl v = f v
no goals