∀ {α : Type u_1} [inst : Field α] [inst_1 : LinearOrder α] [inst_2 : IsStrictOrderedRing α] {β : Type u_2}
  [inst_3 : DivisionRing β] {abv : β → α} [inst_4 : IsAbsoluteValue abv] (x y : β),
  CauSeq.Completion.ofRat (x / y) = CauSeq.Completion.ofRat x / CauSeq.Completion.ofRat y