α : Type u_1
β : Type ?u.47694
l✝ l₁ l₂ l₃ : List α
a b : α
m n : ℕ
l : List α
⊢ map reverse (reverse (map reverse (tails (reverse l)))) = reverse (tails (reverse l))
α : Type u_1
β : Type ?u.47694
l✝ l₁ l₂ l₃ : List α
a b : α
m n : ℕ
l : List α
⊢ map reverse (inits l) = reverse (tails (reverse l))
rw [inits_eq_tails l]
no goals
α : Type u_1
β : Type ?u.47694
l✝ l₁ l₂ l₃ : List α
a b : α
m n : ℕ
l : List α
⊢ map reverse (reverse (map reverse (tails (reverse l)))) = reverse (tails (reverse l))
simp [reverse_involutive.comp_self, reverse_map]