simp [of_fraction]
case refine_2.inl
d a b : ℕ
inst✝ : NeZero d
help : ∀ (i j : Fin 3), i ≤ j → i = 0 ∨ i = j ∨ i = 1 ∧ j = 2
j : Fin (Nat.succ 2)
hij : 0 ≤ j
⊢ of_fraction d a b 0 ≤ of_fraction d a b j
no goals