case h.h.h.h
α : Type u_1
f : Nat
n : α
l : List α
⊢ insertNth f n l = insertNthTR f n l
⊢ @insertNth = @insertNthTR
funext α f n l
no goals
case h.h.h.h
α : Type u_1
f : Nat
n : α
l : List α
⊢ insertNth f n l = insertNthTR f n l
simp [insertNthTR, insertNthTR_go_eq]