Relator.LiftFun

{α : Sort u₁} →
  {β : Sort u₂} → {γ : Sort v₁} → {δ : Sort v₂} → (α → β → Prop) → (γ → δ → Prop) → (α → γ) → (β → δ) → Prop

The binary relations R : α → β → Prop and S : γ → δ → Prop induce a binary relation on functions LiftFun : (α → γ) → (β → δ) → Prop.

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