∀ {α : Type u} {β : Type v} {γ : Type w} {δ : Type x} [inst : Preorder β] [inst_1 : Preorder γ] {f : α → β} {s : Set α}
  {a : α} [inst_2 : Preorder δ] {op : β → γ → δ},
  Relator.LiftFun (fun x1 x2 => x1 ≤ x2) (Relator.LiftFun (fun x1 x2 => x1 ≤ x2) fun x1 x2 => x1 ≤ x2) op op →
    IsMinOn f s a → ∀ {g : α → γ}, IsMinOn g s a → IsMinOn (fun x => op (f x) (g x)) s a