∀ {ι : Type u_1} {α : Type u_2} {β : Type u_3} [inst : AddCommGroup α] [inst_1 : PartialOrder α] [IsOrderedAddMonoid α]
  [inst_3 : PartialOrder β] {s : Set ι} {f : ι → α} {g : ι → β}, AntivaryOn (-f) g s = MonovaryOn f g s