RelIso.ofUniqueOfRefl

{α : Type u_1} →
  {β : Type u_2} →
    (r : α → α → Prop) → (s : β → β → Prop) → [Std.Refl r] → [Std.Refl s] → [Unique α] → [Unique β] → r ≃r s

Two reflexive relations on a unique type are isomorphic.

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