exact ‹m < step n›
case c
ℕ : Type
inst✝³ : Core ℕ
inst✝² : Induction ℕ
inst✝¹ : Addition ℕ
inst✝ : Sign ℕ
order_inst : Order ℕ
n✝ m : ℕ
motive : ℕ → Prop := fun n => AA.OneOfThree (n < m) (n ≃ m) (n > m)
n : ℕ
ih : AA.OneOfThree (n < m) (n ≃ m) (n > m)
b✝ : n ≃ m
this✝² : m ≃ n
this✝¹ : m ≤ n
this✝ : step m ≤ step n
this : m < step n
⊢ step n > m
no goals