fact: Definition monotone_function {X₁ X₂ : hSet} (R₁ : PartialOrder X₁) (R₂ : PartialOrder X₂) : UU := ∑ (f : X₁ → X₂), is_monotone R₁ R₂ f.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.OrderTheory.Posets.Basics