no goals
α : Type u_1
β : Type ?u.46111
l l₁ l₂ l₃ : List α
a b : α
m n : ℕ
⊢ tails [] = reverse (map reverse (inits (reverse [])))
simp
no goals
α : Type u_1
β : Type ?u.46111
l✝ l₁ l₂ l₃ : List α
a✝ b : α
m n : ℕ
a : α
l : List α
⊢ tails (a :: l) = reverse (map reverse (inits (reverse (a :: l))))
simp [tails_eq_inits l, append_left_inj]