have : n > 1 ∨ n ≃ 1 := ge_split this
ℕ : Type
inst✝⁵ : Core ℕ
inst✝⁴ : Induction ℕ
inst✝³ : Addition ℕ
inst✝² : Sign ℕ
inst✝¹ : Order ℕ
inst✝ : Multiplication ℕ
n m : ℕ
x✝ : n * m ≃ 1
this✝ : Positive (n * m)
left✝ : Positive n
right✝ : Positive m
this : n ≥ 1
⊢ n ≃ 1 ∧ m ≃ 1
ℕ : Type
inst✝⁵ : Core ℕ
inst✝⁴ : Induction ℕ
inst✝³ : Addition ℕ
inst✝² : Sign ℕ
inst✝¹ : Order ℕ
inst✝ : Multiplication ℕ
n m : ℕ
x✝ : n * m ≃ 1
this✝¹ : Positive (n * m)
left✝ : Positive n
right✝ : Positive m
this✝ : n ≥ 1
this : n > 1 ∨ n ≃ 1
⊢ n ≃ 1 ∧ m ≃ 1