exact AA.OneOfThree.third ‹Negative (n——m)›
ℕ : Type
inst✝ : Natural ℕ
n m : ℕ
natOrderTri : AA.ExactlyOneOfThree (n < m) (n ≃ m) (n > m)
a✝ : n < m
this : Negative (n——m)
⊢ AA.OneOfThree (n——m ≃ 0) (Positive (n——m)) (Negative (n——m))
no goals